Indirect Dark Matter Searches: a Review Eric Charles SLAC National Lab.
|
|
- David Evans
- 6 years ago
- Views:
Transcription
1 Indirect Dark Matter Searches: a Review Eric Charles SLAC National Lab. 13 eme Recontres de Vietnam: Exploring the Dark Universe 24 July 2017, Quy Nhon, Vietnam
2 Outline 2 I. Review / Context: indirect detection of dark matter II. Indirect dark matter searches A. Astrophysical dark matter signals B. Astrophysical backgrounds C. Summary of current search status D. Focus on Galactic center GeV excess & dwarf spheroidal galaxies III. Summary and prospects
3 3 I. REVIEW / CONTEXT: INDIRECT DETECTION OF DARK MATTER
4 Evidence for / Salient Features of Dark Matter Comprises majority of mass in Galaxies Missing mass on Galaxy Cluster scale Zwicky (1937) Almost collisionless Bullet Cluster Clowe+(2006) Large halos around Galaxies Rotation Curves Rubin+(1980) Non-Baryonic Big-Bang Nucleosynthesis, CMB Acoustic Oscillations WMAP(2010), Planck(2015) 4
5 Evidence for / Salient Features of Dark Matter All of the evidence for dark Large halos around Galaxies Rotation Curves matter is astrophysical! Rubin+(1980) Comprises majority of mass in Galaxies Missing mass on Galaxy Cluster scale Zwicky (1937) Almost collisionless Bullet Cluster Clowe+(2006) Non-Baryonic Big-Bang Nucleosynthesis, CMB Acoustic Oscillations WMAP(2010), Planck(2015) 5
6 Cosmological Constraints on Dark Matter 6 Λ-CDM Concordance Fits Adapted from Kowalski+ (2008) DM Candidates by Mass & Cross Section Park+ (2007) No Standard Model particle matches the known properties of dark matter Many candidate particles have been proposed: In this talk I will focus on WIMPs Current experiments are also sensitive to signals from axion-like particles, primordial black holes and gravitinos & other exotica
7 Indirect Detection of WIMPs 7 This Talk & Thursday PM Session Fermi-LAT, IACTs, HAWC Tuesday AM Session: Brunner & Scott Afternoon Sessions: Cirelli & others AMS-02, DAMPE, CALET Also, consider cosmological effects of annihilation/ decay products on environment: e.g., Shirasaki + (2016PhRvD..94f3522S), Slatyer + (2017PhRvD..95b3010S).
8 Gamma-Ray Telescopes 8 Imaging Atmospheric Cerenkov Telescopes Fermi Large Area Telescope High Altitude Water Cerenkov
9 9 II. INDIRECT DARK MATTER SEARCHES
10 DM Structures are Present on Many Scales Zoom Sequence of DM Structure on 100 Mpc Scales We can probe DM by looking for signal contributions from halos: On cosmological scales (left) In the Milky Way virial radius (~300 kpc = ~1 MLY, right) (Visible size of MW = ~ 20 kpc) Milky Way-like Halo and Several Sub-Halos Left: Boylan-Kolchin+ 2009MNRAS B Right: Springel+ 2008MNRAS S 10
11 Dark Matter as Seen From Earth 11 Satellites Galactic Center Milky Way Halo Galaxy Clusters Isotropic contributions Dark Matter simulation: Pieri+ 2011PhRvD..83b3518P
12 The Key Formula for WIMP Searches 12 Particle Physics Astrophysics (J-Factor) dn /de [MeV 1 ] e + e µ + µ + W + W gg dn/de for 200 GeV DM b b t t s s c c Energy [GeV] 200 GeV J [GeV 2 cm 5 sr 1 ]] J-factor for the Galactic Center NFW gnfw 1.2 gnfw 1.4 Burkert Isothermal Einasto Angular Sep. [deg] Note: J-factor includes distance, i.e., J-factor would decrease by four if a point-like source were twice as far away Note: the key factor of 1/m χ 2 is b/c we express the J-factor as a function of mass density (which we can measure), not number density
13 WIMP Dark Matter as a Thermal Relic 13 DM Density v. Temperature Small cross-section: freeze out too early, too many WIMPs Freeze out Feng (2010) Large cross-section: freeze out too late, too few WIMPs The calculation of the thermal-averaged cross-section <σv> needed to obtain the relic density is robust and gives <σv> ~ cm 3 s -1 At that cross-section we are probing the entire class of particle models that would generate GeV-to-TeV dark matter
14 Searches for Dark Matter with γ rays 14??? γ-ray Sky Galactic Point Sources Isotropic
15 Astrophysical Backgrounds (GeV) Diffuse Backgrounds: Cosmic-ray interactions with interstellar matter and radiation fields Source Backgrounds: Pulsars Blazars and Active Galactic Nuclei Supernova Remnants Galaxies (starburst galaxies) Unresolved Sources 15
16 Improvement of Source Catalogs as a Function of Instrument Sensitivity (S) 16 Flux falls as 1 / d 2 Volume grows as r 3 The number of cataloged sources increases faster than sqrt(t) For a population of objects with the same intrinsic brightness uniformly distributed in space: N ( Flux > S ) scales as S -1.5 The total unresolved flux decreases linearly with S
17 Unresolved Sources 17 These two images contain roughly the same number of γ rays, but in the top left they are truly randomly distributed, in the bottom right they are produced by individual sources that we can not resolve.
18 Dark Matter Search Strategies 18 Satellites Low background and good source id, but low statistics Galactic Center Good statistics, but source confusion/diffuse background Milky Way Halo Large statistics, but diffuse background Spectral Lines Little or no astrophysical uncertainties, good source id, but low sensitivity because of expected small branching ratio Galaxy Clusters Low background, but low statistics Isotropic contributions Large statistics, but astrophysics, Galactic diffuse background Dark Matter simulation: Pieri+ 2011PhRvD..83b3518P
19 Search Strategies (against the γ-ray Sky) Galactic Center Satellites Low background and good Good statistics, but source source id, but low statistics confusion/diffuse background Spectral Lines Milky Way Halo Large statistics, but diffuse background Isotropic contributions Little or no astrophysical uncertainties, good source id, but low sensitivity because of expected small branching ratio 19 Galaxy Clusters Low background, but low statistics Large statistics, but astrophysics, Galactic diffuse background LAT 7 Year Sky > 1 GeV
20 Summary of Results from Indirect-Detection DM Searches as of Fall 2015 χχ -> bb channel 20 LAT limits from other targets shown in gray
21 A Sample of Published Results from Indirect DM Searches with LAT Data 21 h vi [cm 3 s 1 ] Representative Results for Different Search Targets for the b-quark Channel b b MW Halo: Ackermann+ (2013) MW Center: Gomez-Vargas+ (2013) dsphs: Ackermann+ (2015) Unid. Sat.: Bertoni+ (2015) Virgo: Ackermann+ (2015) Isotropic: Ajello+ (2015) X-Correl.: Cuoco+ (2015) APS: Gomez-Vargas+ (2013) Daylan+ (2014) Gordon & Macias (2013) Thermal Relic Cross Section (Steigman+ 2012) Calore+ (2014) Abazajian+ (2014) m [GeV]
22 Summary of Dark Matter Searches with Fermi 22 Comparison of measured upper limits on annihilation of dark matter in dwarf satellite galaxies with annihilation interpretation of the GC excess
23 The Milky Way Galactic Halo Recent papers: Gordon & Macias 2013PhRvD..88h3521G, Abazajian+ 2014PhRvD..90b3526A Calore+ 2015PhRvD..91f3003C, Daylan+ 2016PDU D, Ajello+ [LAT Clb] 2016ApJ A Talks by Moulin, Weniger, Gonthier The goal is to look for DM in the inner Galaxy Because of the large astrophysical foregrounds, we must first understand the γray emission from the Galaxy and from known source classes 23
24 Galactic Center GeV Excess 24 Ackermann et al. (2017) The presence for an γ-ray excess with respect to the modeled diffuse emission at the Galactic center at a few GeV is well established However, the characteristics (and the interpretation) of the excess depend on the modeling of the astrophysical fore/background
25 Galactic Center Excess as Unresolved Sources 25 In 2016, two groups analyzed the Galactic center excess statistically and found that it appears to consist of numerous unresolved point sources, not the sort of smooth halo we would expect from a dark matter signal.
26 Tip of the γ-ray Pulsar iceberg Positions of γ-ray Pulsars Abdo+ 2013ApJS A 26 Positions of γ-ray Pulsars Calore+ 2016ApJ C Measuring the γ-ray pulsar luminosity function is difficult for several reasons including: sample incompleteness, differences in beaming between radio and gamma emission, large variations in detection efficiency across the sky, difficult of blind searches for γ-ray pulsations, increased radio pulse dispersion towards the Galactic center In short, rough agreement that there are ~ Galactic disk γ-ray pulsars (with Lγ > 1033 erg / s) and that Luminosity function is reasonable well modelled by a power-law with index ~1.2 to 1.3
27 Pulsar Candidates in the Galactic Bulge 27 Positions of γ-ray pulsar candidates in the 2FIG source list Ajello (Fermi-LAT) arxiv: Identified Pulsars 3FGL Sources New Sources
28 Confirmation of Bulge Population of Pulsar-Like Sources 28 Ajello (Fermi-LAT) arxiv: Pulsar-like sources as a function of distance from GC Preliminary Recent analysis confirms findings of Lee et al. and Bartels et al., and finds strong independent evidence that the unresolved sources are indeed pulsars. Most important open question: are these young pulsar (τ ~ few Myr) or recycled pulsars in binary systems (τ ~ few Gyr)
29 Known Satellites of the Milky Way Segue 1 Keck Observatory 29 Recent papers: Ackermann+ [LAT Clb] 2015PhRvL.115w1301A, Drlica-Wagner+ [LAT + DES Clbs] 2015ApJ...809L...4D Albert+ [LAT Clb] 2017ApJ A Geringer-Sameth+ 2015PhRvL.115h1101G Talks by Geringer-Sameth, Robles Look for γ-ray emission from Dwarf spheroidal galaxies (dsphs), which are the most dark matter dominated objects known This is a moderate-signal, low-background search strategy
30 Dwarf Spheroidal Satellites of the Milky Way 30 The Milky Way is surrounded by small satellite galaxies Close to Earth (25 kpc to 250 kpc) Optical Luminosities range from 10 3 to 10 7 L Astrophysically inactive Most dark matter dominated objects known 30 kpc
31 Rapidly Growing Number of Known Dwarf Galaxies 31 DES Year 2 Data: Drlica-Wagner+, 2015ApJ D DECam DES Year 1 Data: Bechtol+: 2015ApJ B Koposov+: 2015ApJ K SDSS Advent of deep, digital survey era in optical astronomy has led to the discovery of numerous new Milky Way-satellite dwarf galaxies. LSST & other surveys will continue to find new dwarf galaxies after the Fermi mission.
32 Example γ-ray Count Maps for a dsph Galaxy 32 Albert+ (LAT & DES) 2017ApJ A NFW scale radius PSF containment (68%,98%)
33 Trials Effect: Most dsphs Lie Inside Expectation Bands 33 Significance v. DM mass for dsphs targets for the ττ and bb annihilation channels Albert+ (LAT & DES) 2017ApJ A Here we have highlighted the 4 dsphs that fall outside the 95% containment band for any DM particle mass Note: these are NOT the 4 dsphs with the highest J-factors
34 No Correlation Between J-factor and dsph Signal 34 Flux and <σv> upper limits v. J-factor for dsphs targets Albert+ (LAT & DES) 2017ApJ A Here we plotted the Flux (left) and <σv> (right) upper limits versus J- factor to emphasize that we are not seeing excesses from many of the highest J-factor dsphs
35 Joint Fitting Results from dsphs 35 Upper limits from joint analysis of all dsphs Albert+ (LAT & DES) 2017ApJ A Stacked analysis of dsphs is well within the expectation band for null hypothesis and is in mild tension with DM interpretations of GC excess
36 III. SUMMARY 36
37 Looking Forward 37 Large Synoptic Survey Telescope (LSST) Cerenkov Telescope Array (CTA) Existing experiments (Fermi, IACTs, HAWC) will continue to push sensitivity at thermal relic cross section to higher masses (see talk by Moulin). New optical survey (e.g., LSST) telescopes are coming online that will find more dark matter targets and better quantify the dark matter in existing targets. New ground-based high-energy γ-ray telescope array (CTA) that will search for γ rays from dark matter annihilation to much higher energies than Fermi (see talk by Knödlseder).
38 Dark Matter Sensitivity, circa Comparison of Projected Limits with Direct-Detection and Collider Limits Conversion of direct detection and collider limits following EFT methodology of Bauer+ 2015PDU B Charles+ [Fermi-LAT Clb] 2016PhR C
Probing Dark Matter with Cosmic Messengers
Probing Dark Matter with Cosmic Messengers Andrea Albert Los Alamos National Lab 3rd KMI International Symposium January 6, 2017 Outline Indirect Detection Overview evidence for dark matter dark matter
More informationRecent Searches for Dark Matter with the Fermi-LAT
Recent Searches for Dark Matter with the Fermi-LAT on behalf of the Fermi-LAT Collaboration CETUP* DM Workshop Deadwood, SD 7 July 2016 A One-Slide History of Dark Matter Particle Physics Astrophysics
More informationIndirect dark matter detection and the Galactic Center GeV Excess
Image Credit: Springel et al. 2008 Indirect dark matter detection and the Galactic Center GeV Excess Jennifer Siegal-Gaskins Caltech Image Credit: Springel et al. 2008 Jennifer Siegal-Gaskins Caltech Image
More informationConstraining Galactic dark matter in the Fermi-LAT sky with photon counts statistics
Constraining Galactic dark matter in the Fermi-LAT sky with photon counts statistics Moriond Cosmology 2018 Silvia Manconi (University of Turin & INFN) March 20, 2018 In collaboration with: Hannes Zechlin,
More informationthe CTA Consortium represented by Aldo Morselli
The Dark Matter Programme of the Cherenkov Telescope Array the CTA Consortium represented by Aldo Morselli INFN Roma Tor Vergata 1 CTA PROJECT Next generation ground based Gamma-ray observatory Open observatory
More informationThe Galactic Center Excess. Kevork N. Abazajian
The Galactic Center Excess Kevork N. Abazajian WIMP Annihilation gamma rays in the Galactic Center? Model Data Abazajian & Kaplinghat 2012 Canonical Weakly-Interacting Massive-Particle (WIMP) Cold Dark
More informationGamma rays from Galactic pulsars: high- and lowlatitude
Francesca Calore Gamma rays from Galactic pulsars: high- and lowlatitude emission Conca Specchiulla, 8th September 2014 based on: F. Calore, M. Di Mauro & F. Donato, arxiv:1406.2706 F. Calore, I. Cholis
More informationMattia Di Mauro Eric Charles, Matthew Wood
Characterizing the population of pulsars in the Galactic bulge with the Fermi Large Area Telescope ArXiv:1705.00009 Submitted to ApJ Mattia Di Mauro Eric Charles, Matthew Wood On behalf of the Fermi-LAT
More informationConstraints on dark matter annihilation cross section with the Fornax cluster
DM Workshop@UT Austin May 7, 2012 Constraints on dark matter annihilation cross section with the Fornax cluster Shin ichiro Ando University of Amsterdam Ando & Nagai, arxiv:1201.0753 [astro-ph.he] Galaxy
More informationUsing the Fermi-LAT to Search for Indirect Signals from Dark Matter Annihilation
Using the Fermi-LAT to Search for Indirect Signals from Dark Matter Annihilation Tim Linden UC - Santa Cruz Representing the Fermi-LAT Collaboration with acknowledgements to: Brandon Anderson, Elliott
More informationAndrea Albert (The Ohio State University) on behalf of The Fermi LAT Collaboration. HEP Seminar University of Virginia 12/05/12
Indirect Searches for Dark Matter with the Fermi Large Area Telescope Andrea Albert (The Ohio State University) on behalf of The Fermi LAT Collaboration HEP Seminar University of Virginia 12/05/12 Outline
More informationIndirect dark matter searches with the Cherenkov Telescope Array
Indirect dark matter searches with the Cherenkov Telescope Array Jennifer Gaskins GRAPPA, University of Amsterdam for the CTA Consortium For more details, please see: arxiv:1508.06128 Carr et al. 2015
More informationCross-Correlation of Cosmic Shear and Extragalactic Gamma-ray Background
Cross-Correlation of Cosmic Shear and Extragalactic Gamma-ray Background Masato Shirasaki (Univ. of Tokyo) with Shunsaku Horiuchi (UCI), Naoki Yoshida (Univ. of Tokyo, IPMU) Extragalactic Gamma-Ray Background
More informationSearching for Dark Matter Annihilation from Milky Way Dwarf Spheroidal Galaxies. Present status and future prospects
Searching for Dark Matter Annihilation from Milky Way Dwarf Spheroidal Galaxies. Present status and future prospects Aldo Morselli INFN Roma Tor Vergata CTA in the quest for Dark Matter and exotic phenomena
More informationLatest Results on Dark Matter and New Physics Searches with Fermi. Simona Murgia, SLAC-KIPAC on behalf of the Fermi-LAT Collaboration
Latest Results on Dark Matter and New Physics Searches with Fermi Simona Murgia, SLAC-KIPAC on behalf of the Fermi-LAT Collaboration TeV Particle Astrophysics 2009 SLAC, July 13-16 2009 DM and New Physics
More informationSPATIAL UNIFORMITY OF THE GALACTIC GAMMA-RAY EXCESS. Manoj Kaplinghat, UC Irvine
SPATIAL UNIFORMITY OF THE GALACTIC GAMMA-RAY EXCESS Manoj Kaplinghat, UC Irvine Bas Observed Extended Counts Source Model THE GALACTIC CENTER EXCESS 0.69 0.95 GeV 0.95 1.29 GeV 1.29 1.76 GeV 1.76 2.40
More informationSearching for Dark Matter in the Galactic Center with Fermi LAT: Challenges
Searching for Dark Matter in the Galactic Center with Fermi LAT: Challenges Simona Murgia University of California, Irvine Debates on the Nature of Dark Matter Sackler 2014 19-22 May 2014 arxiv:0908.0195
More informationFermi: Highlights of GeV Gamma-ray Astronomy
Fermi: Highlights of GeV Gamma-ray Astronomy Dave Thompson NASA GSFC On behalf of the Fermi Gamma-ray Space Telescope Large Area Telescope Collaboration Neutrino Oscillation Workshop Otranto, Lecce, Italy
More informationSearch Results and Prospects from Atmospheric Cherenkov Telescopes. Andrew W Smith University of Marland, College Park / NASA GSFC
Search Results and Prospects from Atmospheric Cherenkov Telescopes Andrew W Smith University of Marland, College Park / NASA GSFC From P5 report (Cosmic Frontier) Arrenberg et al. Indirect Detection probes
More informationThe Inner Region of the Milky Way Galaxy in High Energy Gamma Rays
The Inner Region of the Milky Way Galaxy in High Energy Gamma Rays Simona Murgia, SLAC-KIPAC for the Fermi LAT Collaboration Dark Matter Signatures in the Gamma-ray Sky Austin, Texas 7-8 May 2012 arxiv:0908.0195
More informationDark matter annihilation and decay factors in the Milky Way s dwarf spheroidal galaxies
Dark matter annihilation and decay factors in the Milky Way s dwarf spheroidal galaxies Vincent Bonnivard bonnivard@lpsc.in2p3.fr TAUP 2015 07/09/15 Collaborators: D. Maurin, C. Combet, M. G. Walker, A.
More informationHighlights from the Fermi Symposium
Highlights from the Fermi Symposium Aldo Morselli INFN Roma Tor Vergata 1 The LAT at 2 Years and 17 days from the 3 rd!!! 11 June 2008 2 Fermi is Making a Major Impact Science, December 2009 Breakthrough
More informationAnnihilation Phenomenology. Christoph Weniger. GRAPPA, University of Amsterdam
Annihilation Phenomenology Christoph Weniger GRAPPA, University of Amsterdam Thursday 26th March 2015, Effective Field Theories and Dark Matter, Mainz 1 Overview Galactic center excess & PCA Best fit DM
More informationThe Inner Region of the Milky Way Galaxy in High Energy Gamma Rays
The Inner Region of the Milky Way Galaxy in High Energy Gamma Rays Simona Murgia, SLAC-KIPAC for the Fermi LAT Collaboration UCLA Dark Matter 2012 Marina del Rey 22-24 February 2012 arxiv:0908.0195 Gamma
More informationInstituto de Fisica Teórica, IFT-CSIC Madrid. Marco Taoso. DM and the Galactic Center GeV excess
Instituto de Fisica Teórica, IFT-CSIC Madrid Marco Taoso DM and the Galactic Center GeV excess Frontier Objects in Astrophysics and Particle Physics Vulcano Workshop 26-05- 2016 How and where to look for
More informationHunting for Dark Matter in Anisotropies of Gamma-ray Sky: Theory and First Observational Results from Fermi-LAT
Hunting for Dark Matter in Anisotropies of Gamma-ray Sky: Theory and First Observational Results from Fermi-LAT Eiichiro Komatsu (Texas Cosmology Center, Univ. of Texas at Austin) MPA Seminar, September
More informationA New View of the High-Energy γ-ray Sky with the Fermi Telescope
A New View of the High-Energy γ-ray Sky with the Fermi Telescope Aurelien Bouvier KIPAC/SLAC, Stanford University On behalf of the Fermi collaboration SNOWPAC, 2010 The Fermi observatory Launch: June 11
More informationCTA as a γ-ray probe for dark matter structures: Searching for the smallest clumps & the largest clusters
CTA as a γ-ray probe for dark matter structures: Searching for the smallest clumps & the largest clusters Moritz Hütten (MPP Munich) for the CTA consortium "The extreme Universe viewed in very-highenergy
More informationDark Matter in the Galactic Center
Dark Matter in the Galactic Center Tim Linden University of Chicago along with: Eric Carlson, Ilias Cholis, Dan Hooper, Manoj Kaplinghat, Stefano Profumo, Jennifer Siegal-Gaskins, Tracy Slatyer, Hai-Bo
More informationAstroparticle Anomalies
Astroparticle Anomalies Current Hints of Possible Dark Matter Signals Sheldon Campbell University of California, Irvine What is this talk really about? Isn t discussion of low-significance anomalies just
More informationDark Matter Electron Anisotropy: A universal upper limit
Seminari teorici del venerdì Enrico Borriello Università degli Studi di Napoli Federico II & INFN Sezione di Napoli Dark Matter Electron Anisotropy: A universal upper limit Based on Borriello, Maccione,
More informationThe Characterization of the Gamma-Ray Excess from the Central Milky Way
The Characterization of the Gamma-Ray Excess from the Central Milky Way Tim Linden along with: Tansu Daylan, Doug Finkbeiner, Dan Hooper, Stephen Portillo, Tracy Slatyer, Ilias Cholis 1402.6703 1407.5583
More informationThe Characterization of the Gamma-Ray Excess from the Central Milky Way
The Characterization of the Gamma-Ray Excess from the Central Milky Way Tim Linden along with: Tansu Daylan, Doug Finkbeiner, Dan Hooper, Stephen Portillo, Tracy Slatyer, Ilias Cholis 1402.6703 1407.5583
More informationThe VERITAS Dark M atter and Astroparticle Programs. Benjamin Zitzer For The VERITAS Collaboration
The VERITAS Dark M atter and Astroparticle Programs Benjamin Zitzer For The VERITAS Collaboration Introduction to VERITAS Array of four IACTs in Southern AZ, USA Employs ~100 Scientists in five countries
More informationIndirect Detection of Dark Matter with Gamma Rays
Indirect Detection of Dark Matter with Gamma Rays Simona Murgia SLAC-KIPAC University of California, Irvine on behalf of the Fermi LAT Collaboration Dark Attack 212 Ascona, Switzerland 15-2 July 212 WIMP
More informationEmmanuel Moulin! on behalf of the CTA Consortium!!! Rencontres de Moriond 2013! Very High Energy Phenomena in the Universe! March 9-16, La Thuile,
Emmanuel Moulin! on behalf of the CTA Consortium!!! Rencontres de Moriond 2013! Very High Energy Phenomena in the Universe! March 9-16, La Thuile, Italy Emmanuel Moulin CTA meeting, Zürich 2009 1 Core-energy
More informationMattia Di Mauro. Fermi-LAT point source population studies and origin of the Fermi-LAT gamma-ray background. Trieste, May, 3, 2016
Fermi-LAT point source population studies and origin of the Fermi-LAT gamma-ray background Mattia Di Mauro On behalf of the Fermi- LAT Collaboration 1 Trieste, May, 3, 2016 THE ISOTROPIC GAMMA RAY BACKGROUND
More informationDM subhalos: The obser vational challenge
DM subhalos: The obser vational challenge Hannes-S. Zechlin and Dieter Horns Inst. f. Experimentalphysik, Universität Hamburg, Germany July 26th, 2012 DM subhalos in the Milky Way concordance cosmology
More informationM. Lattanzi. 12 th Marcel Grossmann Meeting Paris, 17 July 2009
M. Lattanzi ICRA and Dip. di Fisica - Università di Roma La Sapienza In collaboration with L. Pieri (IAP, Paris) and J. Silk (Oxford) Based on ML, Silk, PRD 79, 083523 (2009) and Pieri, ML, Silk, MNRAS
More informationSignal Model vs. Observed γ-ray Sky
Signal Model vs. Observed γ-ray Sky Springel+, Nature (2008) Two main dark matter signal components: 1. galactocentric diffuse 2. small structures Observed sky modeled with bremsstrahlung π 0 decay up-scattered
More informationTesla Jeltema. Assistant Professor, Department of Physics. Observational Cosmology and Astroparticle Physics
Tesla Jeltema Assistant Professor, Department of Physics Observational Cosmology and Astroparticle Physics Research Program Research theme: using the evolution of large-scale structure to reveal the fundamental
More informationIndirect searches for dark matter with the Fermi LAT instrument
Indirect searches for dark matter with the Fermi LAT instrument M. Nicola Mazziotta INFN-Bari mazziotta@ba.infn.it 2nd international workshop on HERD Beijing Dec 2-3, 2013 Indirect Dark Matter Search +
More informationThe Cherenkov Telescope Array
The Cherenkov Telescope Array Gamma-ray particle astrophysics Dark Matter Space time Cosmic rays...? Gamma-ray particle astrophysics Dark Matter Space time Cosmic rays...? Particle Dark Matter Direct Detection
More informationarxiv: v1 [astro-ph.he] 28 Jun 2016
Revisiting the constraints on annihilating dark matter by radio observational data of M31 Man Ho Chan The Education University of Hong Kong arxiv:1606.08537v1 [astro-ph.he] 28 Jun 2016 (Dated: October
More informationConstraining Dark Matter annihilation with the Fermi-LAT isotropic gamma-ray background
Constraining Dark Matter annihilation with the Fermi-LAT isotropic gamma-ray background Fiorenza Donato @ Physics Dept., Un. Torino The gamma-ray sky - Minneapolis, October 10, 2013 Plan of my talk What
More informationDark Matter Annihilations in the Galactic Center
Dan Hooper (Fermilab/University of Chicago) Debates on the Nature of Dark Matter, Harvard/CfA May 21, 2014 Dark Matter Annihilations in the Galactic Center This talk is based on: T. Daylan, D. Finkbeiner,
More informationAstro2020 Science White Paper Prospects for the detection of synchrotron halos around middle-age pulsars
Astro2020 Science White Paper Prospects for the detection of synchrotron halos around middle-age pulsars Thematic Areas: Planetary Systems Star and Planet Formation Formation and Evolution of Compact Objects
More informationSearching for spectral features in the g-ray sky. Alejandro Ibarra Technische Universität München
Searching for spectral features in the g-ray sky Alejandro Ibarra Technische Universität München Oslo 5 November 2014 Outline Motivation Indirect dark matter searches with gamma-rays. Overcoming backgrounds
More informationHigh-Energy GammaRays toward the. Galactic Centre. Troy A. Porter Stanford University
High-Energy GammaRays toward the Galactic Centre Troy A. Porter Stanford University Fermi LAT 5-Year Sky Map > 1 GeV Galactic Plane Galactic Centre Point Sources Diffuse γ-ray emission produced by cosmic
More informationIndirect Dark Matter Detection with Dwarf Galaxies
Indirect Dark Matter Detection with Dwarf Galaxies Neelima Sehgal KIPAC-SLAC/Stanford SnowPAC, Utah 2010 Rouven Essig, NS, Louis Strigari, arxiv: 0902.4750, PRD 80, 023506 (2009) Rouven Essig, NS, Louis
More informationRuling out dark matter interpretation of the galactic GeV excess by gamma-ray data of galaxy clusters
www.nature.com/scientificreports Received: 3 August 07 Accepted: 8 October 07 Published: xx xx xxxx OPEN Ruling out dark matter interpretation of the galactic GeV excess by gamma-ray data of galaxy clusters
More informationTesting a DM explanation of the positron excess with the Inverse Compton scattering
Testing a DM explanation of the positron excess with the Inverse Compton scattering Gabrijela Zaharijaš Oskar Klein Center, Stockholm University Work with A. Sellerholm, L. Bergstrom, J. Edsjo on behalf
More informationNon-detection of the 3.55 kev line from M31/ Galactic center/limiting Window with Chandra
Non-detection of the 3.55 kev line from M31/ Galactic center/limiting Window with Chandra Meng Su (MIT)! Pappalardo/Einstein fellow!! In Collaboration with Zhiyuan Li (NJU)!! 15 Years of Science with Chandra!
More informationConstraints on Light WIMPs from Isotropic Diffuse γ-ray Emission
Constraints on Light WIMPs from Isotropic Diffuse γ-ray Emission Michel H.G. Tytgat Université Libre de Bruxelles Belgium Rencontres de Moriond: EW Interactions and Unified Theories March 2011 There are
More informationSpectra of Cosmic Rays
Spectra of Cosmic Rays Flux of relativistic charged particles [nearly exactly isotropic] Particle density Power-Law Energy spectra Exponent (p, Nuclei) : Why power laws? (constraint on the dynamics of
More informationDark Matter ASTR 2120 Sarazin. Bullet Cluster of Galaxies - Dark Matter Lab
Dark Matter ASTR 2120 Sarazin Bullet Cluster of Galaxies - Dark Matter Lab Mergers: Test of Dark Matter vs. Modified Gravity Gas behind DM Galaxies DM = location of gravity Gas = location of most baryons
More informationGalactic Novae Simulations for the Cherenkov Telescope Array
Galactic Novae Simulations for the Cherenkov Telescope Array REU Final Presentation August 4, 2017 Colin Adams Primary Mentors: Brian Humensky, Deivid Ribeiro Outline Introduction Why and how do we study
More informationThe High-Energy Interstellar Medium
The High-Energy Interstellar Medium Andy Strong MPE Garching on behalf of Fermi-LAT collaboration Cosmic Ray Interactions: Bridging High and Low Energy Astrophysics Lorentz Centre Workshop March 14-18
More informationThe Cherenkov Telescope Array (CTA)
The Cherenkov Telescope Array (CTA) The CTA Consortium1, represented by Andreas Reisenegger2 1 2 see http://www.cta observatory.org/consortium_authors/authors_2018_01.html for full author list Instituto
More informationUpdate on the Two Smoking Gun" Fermi LAT Searches for Dark Matter- Milky Way Dwarfs and Lines
Update on the Two Smoking Gun" Fermi LAT Searches for Dark Matter- Milky Way Dwarfs and Lines Elliott Bloom KIPAC-SLAC, Stanford University On Behalf of the Fermi-LAT Collaboration What We are Learning
More informationStructure of Dark Matter Halos
Structure of Dark Matter Halos Dark matter halos profiles: DM only: NFW vs. Einasto Halo concentration: evolution with time Dark matter halos profiles: Effects of baryons Adiabatic contraction Cusps and
More informationDark Matter. Jaan Einasto Tartu Observatory and ICRANet 16 December Saturday, December 15, 12
Dark Matter Jaan Einasto Tartu Observatory and ICRANet 16 December 2012 Local Dark Matter: invisible matter in the Galaxy in Solar vicinity Global Dark Matter: invisible matter surrounding galaxies Global
More informationProspects for indirect dark matter detection with Fermi and IACTs
Prospects for indirect dark matter detection with Fermi and IACTs Francesc Ferrer Washington University in St. Louis TeV Particle Astrophysics, SLAC, July 2009 Signals of Dark Matter (DM) at γ ray telescopes
More informationVery High-Energy Gamma- Ray Astrophysics
Very High-Energy Gamma- Ray Astrophysics David A. Williams Santa Cruz Institute for Particle Physics UC Santa Cruz Quarknet July 12, 2013 Detecting High Energy Gamma Rays High Sensitivity HESS, MAGIC,
More informationCLUMPY: A public code for γ-ray and ν signals from dark matter structures.
CLUMPY: A public code for γ-ray and ν signals from dark matter structures. Moritz Hütten, DESY Zeuthen for the CLUMPY developers: Vincent Bonnivard, Moritz Hütten, Emmanuel Nezri, Aldée Charbonnier, Céline
More informationGamma Ray Physics in the Fermi era. F.Longo University of Trieste and INFN
Gamma Ray Physics in the Fermi era F.Longo University of Trieste and INFN Vulcano, May 22, 2018 F.Longo et al. -- 1 Gamma-ray astrophysics above 100 MeV AGILE Fermi 2 Picture of the day, Feb. 28, 2011,
More informationDark Matter - II. Workshop Freudenstadt shedding (Cherenkov) light on dark matter. September 30, 2015
Dark Matter - II GRK 1694: Elementarteilchenphysik bei höchster Energie und höchster Präzision Workshop Freudenstadt 2015 September 30, 2015 Guido Guido Drexlin, Drexlin, Institut Institut für für für
More informationInterstellar gamma rays. New insights from Fermi. Andy Strong. on behalf of Fermi-LAT collaboration. COSPAR Scientific Assembly, Bremen, July 2010
Interstellar gamma rays New insights from Fermi Andy Strong on behalf of Fermi-LAT collaboration COSPAR Scientific Assembly, Bremen, July 2010 Session E110: ' The next generation of ground-based Cerenkov
More informationIsotropic diffuse and extragalactic γ-ray background: emission from extragalactic sources vs dark matter annihilating particles
Journal of Physics: Conference Series PAPER OPEN ACCESS Isotropic diffuse and extragalactic γ-ray background: emission from extragalactic sources vs dark matter annihilating particles To cite this article:
More informationPERSPECTIVES of HIGH ENERGY NEUTRINO ASTRONOMY. Paolo Lipari Vulcano 27 may 2006
PERSPECTIVES of HIGH ENERGY NEUTRINO ASTRONOMY Paolo Lipari Vulcano 27 may 2006 High Energy Neutrino Astrophysics will CERTAINLY become an essential field in a New Multi-Messenger Astrophysics What is
More informationDiffuse Gamma-Ray Emission
Diffuse Gamma-Ray Emission Debbijoy Bhattacharya Manipal Centre for Natural Sciences (MCNS) Manipal University 5 Sept 2014 Observational Gamma-Ray Astronomy Atmospheric Window 00 11 00 11 Figure: Atmospheric
More informationA New Method for Characterizing Unresolved Point Sources: applications to Fermi Gamma-Ray Data
A New Method for Characterizing Unresolved Point Sources: applications to Fermi Gamma-Ray Data Ben Safdi Massachusetts Institute of Technology 2015 B.S., S. Lee, M. Lisanti, and B.S., S. Lee, M. Lisanti,
More informationDark matter indirect searches: Multi-wavelength and anisotropies
Journal of Physics: Conference Series PAPER OPEN ACCESS Dark matter indirect searches: Multi-wavelength and anisotropies To cite this article: Shin ichiro Ando 2016 J. Phys.: Conf. Ser. 718 022002 Related
More informationCMB constraints on dark matter annihilation
CMB constraints on dark matter annihilation Tracy Slatyer, Harvard University NEPPSR 12 August 2009 arxiv:0906.1197 with Nikhil Padmanabhan & Douglas Finkbeiner Dark matter!standard cosmological model:
More informationSearching for dark matter annihilation lines with HESS II. Knut Dundas Morå for the HESS collaboration
Searching for dark matter annihilation lines with HESS II Knut Dundas Morå for the HESS collaboration Outline Indirect Dark Matter detection Dark Matter signatures Dark Matter distributions Fermi Line
More informationDARK MATTER. Martti Raidal NICPB & University of Helsinki Tvärminne summer school 1
DARK MATTER Martti Raidal NICPB & University of Helsinki 28.05.2010 Tvärminne summer school 1 Energy budget of the Universe 73,4% - Dark Energy WMAP fits to the ΛCDM model Distant supernova 23% - Dark
More informationEGRET Excess of diffuse Galactic Gamma Rays as a Trace of the Dark Matter Halo
EGRET Excess of diffuse Galactic Gamma Rays as a Trace of the Dark Matter Halo Indirect Search for Dark Matter W. de Boer 1, I. Gebauer 1, A.V. Gladyshev 2, D. Kazakov 2, C. Sander 1, V. Zhukov 1 1 Institut
More informationThe Fermi GeV excess and beyond: New techniques for indirect DM searches
The Fermi GeV excess and beyond: New techniques for indirect DM searches Christoph Weniger GRAPPA @ UvA (University of Amsterdam) 13th Rencontres du Vietnam Exploring the Dark Universe 27th July 2017 Overview
More informationThe γ-ray Milky Way above 10 GeV: Distinguishing Sources from Diffuse Emission
The γ-ray Milky Way above 10 GeV: Distinguishing Sources from Diffuse Emission, a C. Deil, a A. Donath, a R. Terrier b a Max-Planck-Institut für Kernphysik, P.O. Box 103980, D 69029 Heidelberg, Germany
More informationResolving the Extragalactic γ-ray Background
Resolving the Extragalactic γ-ray Background Marco Ajello Clemson University On behalf of the Fermi-LAT collab. (with a few additions by Jack) Ackermann+2015, ApJ, 799, 86 Ajello+2015, ApJL, 800,27 Ackermann+2016,
More informationImpact of substructures on predictions of dark matter annihilation signals
Impact of substructures on predictions of dark matter annihilation signals Julien Lavalle Institute & Dept. of Theoretical Physics, Madrid Aut. Univ. & CSIC DESY Theory Astroparticle, Hamburg 16 V 2011
More informationRecent highlights from VERITAS
Recent highlights from VERITAS K. Ragan McGill University RICAP 2011, Rome, 26-May-2011 K. Ragan VERITAS RICAP '11 1 Outline Very high-energy (VHE) gamma-ray astrophysics Ground-based observations with
More informationRecent Results on Dark Matter Searches with Fermi. Simona Murgia, SLAC-KIPAC on behalf of the Fermi-LAT Collaboration
Recent Results on Dark Matter Searches with Fermi Simona Murgia, SLAC-KIPAC on behalf of the Fermi-LAT Collaboration KITP-UCSB 8 December 2009 The Observatory Observe the gamma-ray sky in the 20 MeV to
More informationSEARCH FOR AXION- LIKE PARTICLE SIGNATURES IN GAMMA-RAY DATA
SEARCH FOR AXION- LIKE PARTICLE SIGNATURES IN GAMMA-RAY DATA MANUEL MEYER, JAN CONRAD, MIGUEL SANCHEZ-CONDE DECEMBER 11, 2015 GAMMA RAYS AND DARK MATTER 2015 OBERGURGL, AUSTRIA MANUEL.MEYER@FYSIK.SU.SE
More informationConstraining dark matter signal from a combined analysis of Milky Way satellites using the Fermi-LAT arxiv: v1 [astro-ph.
Constraining dark matter signal from a combined analysis of Milky Way satellites using the Fermi-LAT arxiv:1102.5701v1 [astro-ph.he] 28 Feb 2011 Stockholm University E-mail: maja.garde@fysik.su.se On behalf
More informationAstrophysics with GLAST: dark matter, black holes and other astronomical exotica
Astrophysics with GLAST: dark matter, black holes and other astronomical exotica Greg Madejski Stanford Linear Accelerator Center and Kavli Institute for Particle Astrophysics and Cosmology (KIPAC) Outline:
More informationDark Matter Decay and Cosmic Rays
Dark Matter Decay and Cosmic Rays Christoph Weniger Deutsches Elektronen Synchrotron DESY in collaboration with A. Ibarra, A. Ringwald and D. Tran see arxiv:0903.3625 (accepted by JCAP) and arxiv:0906.1571
More informationDark Matter in the Universe
Dark Matter in the Universe NTNU Trondheim [] Experimental anomalies: WMAP haze: synchrotron radiation from the GC Experimental anomalies: WMAP haze: synchrotron radiation from the GC Integral: positron
More informationRobust estimate of the dark matter halo of the Milky-way's dwarf spheroidal galaxies
Robust estimate of the dark matter halo of the Milky-way's dwarf spheroidal galaxies Koji Ichikawa arxiv:1701.xxxxx arxiv:1608.01749 (submitted in MNRAS) MNRAS, 461, 2914 (1603.08046 [astroph.ga]) In collaboration
More informationGamma-ray emission at the base of the Fermi bubbles. Dmitry Malyshev, Laura Herold Erlangen Center for Astroparticle Physics
Gamma-ray emission at the base of the Fermi bubbles Dmitry Malyshev, Laura Herold Erlangen Center for Astroparticle Physics On behalf of the Fermi-LAT collaboration TeVPA 2018, Berlin Fermi bubbles surprise
More informationAn Auger Observatory View of Centaurus A
An Auger Observatory View of Centaurus A Roger Clay, University of Adelaide based on work particularly done with: Bruce Dawson, Adelaide Jose Bellido, Adelaide Ben Whelan, Adelaide and the Auger Collaboration
More informationProbing the nature of Dark matter with radio astronomy. Céline Boehm
Probing the nature of Dark matter with radio astronomy Céline Boehm IPPP, Durham LAPTH, Annecy SKA, Flic en Flac, May 2017 The DM Physics scale strong or weak / stable or decaying strong and stable Electromagnetic
More informationDark Matter and Dark Energy components chapter 7
Dark Matter and Dark Energy components chapter 7 Lecture 3 See also Dark Matter awareness week December 2010 http://www.sissa.it/ap/dmg/index.html The early universe chapters 5 to 8 Particle Astrophysics,
More informationNikolay Topchiev for the GAMMA-400 Collaboration High-energy gamma-ray studying with GAMMA-400
Nikolay Topchiev for the GAMMA-400 Collaboration High-energy gamma-ray studying with GAMMA-400 July 12-20, 2017, ICRC2017, Busan, Korea High-energy gamma-ray studying Distribution of 3033 discrete sources
More informationOn the scientific motivation for a wide field-of-view TeV gamma-ray observatory in the Southern Hemisphere
On the scientific motivation for a wide field-of-view TeV gamma-ray observatory in the Southern Hemisphere for the HAWC collaboration E-mail: miguel@psu.edu Observations of high energy gamma rays are an
More informationarxiv: v2 [astro-ph.co] 11 May 2017
Multi-frequency search for Dark Matter: the role of, CTA, and SKA arxiv:1704.08029v2 [astro-ph.co] 11 May 2017 School of Physics, University of the Witwatersrand, Johannesburg, South Africa E-mail: geoffrey.beck@wits.ac.za
More informationarxiv: v1 [astro-ph.he] 29 Jan 2015
arxiv:1501.07485v1 [astro-ph.he] 29 Jan 2015 Fitting the Fermi-LAT GeV excess: on the importance of the propagation of electrons from dark matter UPMC-CNRS, UMR7095, Institut d Astrophysique de Paris,
More informationWino dark matter breaks the siege
Wino dark matter breaks the siege Shigeki Matsumoto (Kavli IPMU) In collaboration with M. Ibe, K. Ichikawa, and T. Morishita 1. Wino dark matter (Motivation & Present limits) 2. Wino dark matter is really
More informationDark Matter searches with radio observations
Marco Taoso Dpt. of Physics and Astronomy UBC Vancouver Dark Matter searches with radio observations IDM 2012 Chicago, 23-27 July Search for DM with astrophysical observations Gamma- rays Microwave Radio
More informationRadio counterparts of gamma-ray pulsars
Radio counterparts of gamma-ray pulsars Lucas Guillemot, MPIfR Bonn guillemo@mpifr-bonn.mpg.de on behalf of the Fermi LAT Collaboration IAU Symposium 2012, Beijing 20/08/12 117 gamma-ray pulsars! 41 young
More information