What Gravitational Lensing tells us
|
|
- Hillary Cannon
- 5 years ago
- Views:
Transcription
1 What Gravitational Lensing tells us Catherine Heymans Institute for Astronomy, University of Edinburgh Six Six things lensing has has told told us us about Dark Matter How How lensing works First First results from from CFHTLenS
2 1: Dark Matter exists Dark Matter collisionless Galaxies Hot Baryonic Gas (large interaction cross section) Clowe, Bradac Catherine Heymanset al 2006 Darkness Visible 4th Aug 2010
3 2: Dark Matter is ~Cold, not TeVeS LRGs R Reyes et al 2010 with neutrinos E G (R) = DM Mass(< R) β Clustering of galaxies in annuli R = Ω m f(z)
4 3: Dark Matter can not be explained by MACHOs microlensing result EROS collaboration: Afonso et al 2003
5 4: Dark Matter halos have CDM NFW profiles Projected scaled surface mass density A similar analysis can also probe the shape of DM haloes NFW Leauthard et al in prep Modeling needs to include baryonic component
6 5: Dark Matter can be mapped at high resolution
7 6: Dark Matter Simon, Heymans et al 2010 can be seen in 3D With photometric redshifts we can reconstruct the matter density in 3D
8 6: Dark Matter Simon, Heymans et al 2010 can be seen in 3D With photometric redshifts we can reconstruct the matter density in 3D Simon, Heymans et al 2010
9 lensed background galaxy z = 1.55 Gravitational Lensing lens galaxy z = 0.168
10 Weak Gravitational Lensing The intervening dark matter lenses the light from distant galaxies.
11
12 <e i source > = circle Before lensing galaxies are randomly oriented*
13 Weak Gravitational Lensing : cosmic shear The lensing effect distorts or shears the images of background galaxies. Dark Matter Galaxies It is the only method that is directly sensitive to mass on large scales irrespective of its state or nature Lensed galaxies align
14 Dark Matter changes the shapes of galaxies by ~1% Telescopes change the shapes of galaxies by ~10% GREAT10: Kitching et al 2010 We need to understand our instrumentation to a higher precision than ever before
15 CFHTLenS Area: 171 sq degrees from CFHTLS-Wide Survey Multi-colour depth: ugriz, to i=24.7 (7 sigma extended source) Accurate shear and photometric redshift measurements for ~16 gals per sq arcmin Median redshift: zm = 0.75
16 The CFHTLenS Team A survey an order of magnitude larger than anything before requires an analysis an order of magnitude better than anything before UBC L. Van Waerbeke (PI) J. Benjamin M. Milkeraitis S.Vafaei Waterloo M Hudson B. Gillis Oxford L. Miller Edinburgh C. Heymans (PI) T. Kitching E. Grocutt Bonn T. Erben K. Holhjem P. Simon Naples L. Fu IAP Y. Mellier C. Bonnett R. Gavazzi Munich M. Kilbinger Tohoku J. Coupon Leiden H.Hildebrandt H. Hoekstra K. Kuijken T. Schrabback E. Semboloni M. Velander E. van Uitert M. Smit JPL/Caltech B. Rowe
17 CFHTLenS
18 VVDS Deep 72 sq degrees 49 sq degrees 25 sq degrees 25 sq degrees VIPERS DEEP2 Catherine Heymans VVDS Wide Darkness Visible 4th Aug 2010
19 New Bayesian Model fitting method + bayesian photometric redshift method 1: Create galaxy model forward FFT, multiply, inverse FFT 3: Convolve galaxy and PSF Compare data and model to maximise likelihood Data + lensing quality data reduction pipeline 2: Select PSF model Reference: Miller et al 2007, Catherine Heymans Kitching et al 2008 Darkness Visible 4th Aug 2010
20 Gaussianised Photometric Redshifts Gaussianised method i < 24 z phot z phot Standard method i < 24 σz = σz = outlier = 10.1% outlier = 4.9% z spec z spec Reference: Kuijken 2008, Hildebrandt et al 2009 PSF Catherine Heymans Kernel = Result Darkness Visible 4th Aug 2010
21 Systematics tests Goal: zero systematics for all field Reality: systematics exist and we require a cosmology-free statistic to reject data with significant systematics Current field rejection rate is 40% Catherine Heymans Darkness Visible 4th Aug 2010
22 Euclid/LSST ADEPT The Dark Energy Quest DES PS1 VST-KIDS BOSS CFHTLenS Wiggle-Z Catherine Heymans Number of spectra Number of galaxies Big-BOSS BAO Lensing Darkness Visible 4th Aug 2010
23 Conclusions Lensing is a unique technique that can directly probe dark matter It has provided concrete evidence for the existence of CDM CFHTLenS is the largest deep cosmological survey for lensing: we see DM spanning degree scales Future: VST-KIDS, DES, Euclid, LSST
Catherine Heymans. Observing the Dark Universe with the Canada- France Hawaii Telescope Lensing Survey
Observing the Dark Universe with the Canada- France Hawaii Telescope Lensing Survey Catherine Heymans Institute for Astronomy, University of Edinburgh The intervening dark matter lenses the light from
More informationAre VISTA/4MOST surveys interesting for cosmology? Chris Blake (Swinburne)
Are VISTA/4MOST surveys interesting for cosmology? Chris Blake (Swinburne) Yes! Probes of the cosmological model How fast is the Universe expanding with time? How fast are structures growing within it?
More informationWeak Lensing. Alan Heavens University of Edinburgh UK
Weak Lensing Alan Heavens University of Edinburgh UK Outline History Theory Observational status Systematics Prospects Weak Gravitational Lensing Coherent distortion of background images Shear, Magnification,
More informationWeak Lensing: Status and Prospects
Weak Lensing: Status and Prospects Image: David Kirkby & the LSST DESC WL working group Image: lsst.org Danielle Leonard Carnegie Mellon University Figure: DES Collaboration 2017 for LSST DESC June 25,
More informationLensing with KIDS. 1. Weak gravitational lensing
Lensing with KIDS studying dark matter and dark energy with light rays Konrad Kuijken Leiden Observatory Outline: 1. Weak lensing introduction 2. The KIDS survey 3. Galaxy-galaxy lensing (halos) 4. Cosmic
More informationCosmic shear analysis of archival HST/ACS data
1 Patrick Simon 2,1 Thomas Erben 1 Peter Schneider 1 Jan Hartlap 1 Catherine Heymans 3 Phil Marshall 4,5 Chris Fassnacht 6 Eric Morganson 4 Marusa Bradac 4,5 Hendrik Hildebrandt 1 Marco Hetterscheidt 1
More informationWeak lensing measurements of Dark Matter Halos around galaxies
Weak lensing measurements of Dark Matter Halos around galaxies Rachel Mandelbaum Carnegie Mellon University 1 Image credits: NASA, ESA, S. Beckwith (STScI), the HUDF Team 2 Image credit: ESA/Planck 3 The
More informationWarm dark matter with future cosmic shear data
Workshop CIAS Meudon, Tuesday, June 7, 2011 Warm dark matter with future cosmic shear data Katarina Markovic (University Observatory Munich) markovic@usm.lmu.de in collaboration with Jochen Weller and
More informationCosmology and Large Scale Structure
Cosmology and Large Scale Structure Alexandre Refregier PASCOS13 Taipei 11.22.2013 Matter Baryons Dark Matter Radiation Inflation Dark Energy Gravity Measuring the Dark Universe Geometry Growth of structure
More informationGravitational Lensing. Y. Mellier - IAP
Gravitational Lensing Y. Mellier - IAP Gravitational deflection of light Source D LS Lens D OS D OL Observer Gravitational deflection of light Source Projected gravitational potential D LS Lens D Angular
More informationWeak Gravitational Lensing
Weak Gravitational Lensing Sofia Sivertsson October 2006 1 General properties of weak lensing. Gravitational lensing is due to the fact that light bends in a gravitational field, in the same fashion as
More informationarxiv: v1 [astro-ph.co] 7 Mar 2013
Mon. Not. R. Astron. Soc. 000, 000 000 (0000) Printed 8 March 2013 (MN LATEX style file v2.2) arxiv:1303.1808v1 [astro-ph.co] 7 Mar 2013 CFHTLenS tomographic weak lensing cosmological parameter constraints:
More informationStudying the Dark Side of the Universe with. Tim Schrabback. Leiden Observatory Dresden, February 12th, 2009
Studying the Dark Side of the Universe with Tim Schrabback Leiden Observatory Dresden, February 12th, 2009 Roadmap 1. Cosmology: Our changing view of the dark Universe 2. Seeing the invisible with gravitational
More informationÉnergie noire Formation des structures. N. Regnault C. Yèche
Énergie noire Formation des structures N. Regnault C. Yèche Outline Overview of DE probes (and recent highlights) Hubble Diagram of supernovae Baryon accoustic oscillations Lensing Matter clustering (JLA)
More informationApproximate Bayesian computation: an application to weak-lensing peak counts
STATISTICAL CHALLENGES IN MODERN ASTRONOMY VI Approximate Bayesian computation: an application to weak-lensing peak counts Chieh-An Lin & Martin Kilbinger SAp, CEA Saclay Carnegie Mellon University, Pittsburgh
More informationCFHTLenS: combined probe cosmological model comparison using 2D weak gravitational lensing
MNRAS 430, 2200 2220 (2013) doi:10.1093/mnras/stt041 CFHTLenS: combined probe cosmological model comparison using 2D weak gravitational lensing Martin Kilbinger, 1,2,3,4 Liping Fu, 5 Catherine Heymans,
More informationFisher Matrix Analysis of the Weak Lensing Spectrum
Fisher Matrix Analysis of the Weak Lensing Spectrum Manuel Rabold Institute for Theoretical Physics, University of Zurich Fisher Matrix Analysis of the Weak Lensing Spectrum Manuel Rabold Aarhus University,
More informationDark Energy. Cluster counts, weak lensing & Supernovae Ia all in one survey. Survey (DES)
Dark Energy Cluster counts, weak lensing & Supernovae Ia all in one survey Survey (DES) What is it? The DES Collaboration will build and use a wide field optical imager (DECam) to perform a wide area,
More informationMILANO OAB: L. Guzzo, S. de la Torre,, E. Majerotto, U. Abbas (Turin), A. Iovino; MILANO IASF (data reduction center): B. Garilli, M. Scodeggio, D.
MILANO OAB: L. Guzzo, S. de la Torre,, E. Majerotto, U. Abbas (Turin), A. Iovino; MILANO IASF (data reduction center): B. Garilli, M. Scodeggio, D. Bottini, P. Franzetti, P. Memeo, M. Polletta, L. Tasca;
More informationThe State of Tension Between the CMB and LSS
The State of Tension Between the CMB and LSS Tom Charnock 1 in collaboration with Adam Moss 1 and Richard Battye 2 Phys.Rev. D91 (2015) 10, 103508 1 Particle Theory Group University of Nottingham 2 Jodrell
More informationWhere do Luminous Red Galaxies form?
Where do Luminous Red Galaxies form? The clustering of galaxies 2dF Galaxy Redshift Survey Redshift Distance (billions of light yrs) You are here The clustering of galaxies... encodes cosmological / astrophysical
More informationCosmology with the ESA Euclid Mission
Cosmology with the ESA Euclid Mission Andrea Cimatti Università di Bologna Dipartimento di Astronomia On behalf of the Euclid Italy Team ESA Cosmic Vision 2015-2025 M-class Mission Candidate Selected in
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 informationWeighing the Giants:
Weighing the Giants: Accurate Weak Lensing Mass Measurements for Cosmological Cluster Surveys Anja von der Linden Tycho Brahe Fellow DARK Copenhagen + KIPAC, Stanford IACHEC, May 14, 2014 1 Hello! Copenhagen
More informationScience from overlapping lensing / spec-z surveys. Chris Blake (Swinburne)
Science from overlapping lensing / spec-z surveys Chris Blake (Swinburne) Probes of the cosmological model How fast is the Universe expanding with time? How fast are structures growing within it? Redshift-space
More informationLarge-Scale Filaments From Weak Lensing
Large-Scale Filaments From Weak Lensing by Seth Epps A thesis presented to the University of Waterloo in fulfillment of the thesis requirement for the degree of Master of Science in Physics Waterloo, Ontario,
More informationThe Dark Sector ALAN HEAVENS
The Dark Sector ALAN HEAVENS INSTITUTE FOR ASTRONOMY UNIVERSITY OF EDINBURGH AFH@ROE.AC.UK THIRD TRR33 WINTER SCHOOL PASSO DEL TONALE (ITALY) 6-11 DECEMBER 2009 Outline Dark Matter Dark Energy Dark Gravity
More informationControlling intrinsic alignments in weak lensing statistics
Controlling intrinsic alignments in weak lensing statistics Benjamin Joachimi, Peter Schneider joachimi@astro.uni-bonn.de Bonn University, Germany ADA6, Monastir, Tunisia May 6th 2010 Outline Intrinsic
More informationCosmic shear and cosmology
Cosmic shear and cosmology Overview Second-order cosmic shear statistics Shear tomography (2 1/2 D lensing) Third-order cosmic shear statistics 3D lensing Peak statistics Shear-ratio geometry test (Flexion)
More informationBayesian galaxy shape measurement for weak lensing surveys III. Application to the Canada France Hawaii Telescope Lensing Survey
MNRAS 429, 2858 2880 (2013) doi:10.1093/mnras/sts454 Bayesian galaxy shape measurement for weak lensing surveys III. Application to the Canada France Hawaii Telescope Lensing Survey L. Miller, 1 C. Heymans,
More informationBAO errors from past / future surveys. Reid et al. 2015, arxiv:
BAO errors from past / future surveys Reid et al. 2015, arxiv:1509.06529 Dark Energy Survey (DES) New wide-field camera on the 4m Blanco telescope Survey started, with first year of data in hand Ω = 5,000deg
More informationEUCLID Cosmology Probes
EUCLID Cosmology Probes Henk Hoekstra & Will Percival on behalf of the EUCLID The presented document is Proprietary information of the. This document shall be used and disclosed by the receiving Party
More informationExtending Robust Weak Lensing Masses to z~1. Douglas Applegate, Tim Schrabback & the SPT-Lensing Team
Extending Robust Weak Lensing Masses to z~1 Douglas Applegate, Tim Schrabback & the SPT-Lensing Team 1 SPT Lensing Team Bonn Tim Schrabback Douglas Applegate Fatimah Raihan Chicago Brad Benson Lindsay
More informationDiving into precision cosmology and the role of cosmic magnification
Diving into precision cosmology and the role of cosmic magnification Jose Luis Bernal Institute of Cosmos Science - Barcelona University ICC Winter Meeting 2017 06/02/2017 Jose Luis Bernal (ICCUB) ICC
More informationCosmology with weak-lensing peak counts
Durham-Edinburgh extragalactic Workshop XIV IfA Edinburgh Cosmology with weak-lensing peak counts Chieh-An Lin January 8 th, 2018 Durham University, UK Outline Motivation Why do we study WL peaks? Problems
More informationProbing the Universe Using a Mostly Virtual Survey: The Garching-Bonn Deep Survey
Probing the Universe Using a Mostly Virtual Survey: The Garching-Bonn Deep Survey Marco Hetterscheidt Patrick Simon Thomas Erben Peter Schneider Mischa Schirmer Jörg P. Dietrich,8 Hendrik Hildebrandt Oliver
More informationarxiv: v1 [astro-ph.co] 30 Oct 2012
Mon. Not. R. Astron. Soc. 000, 1 24 (2011) Printed 1 November 2012 (MN LATEX style file v2.2) Bayesian Galaxy Shape Measurement for Weak Lensing Surveys -III. Application to the Canada-France-Hawaii Telescope
More informationMapping the dark universe with cosmic magnification
Mapping the dark universe with cosmic magnification 张鹏杰 Zhang, Pengjie 中科院上海天文台 Shanghai Astronomical Observatory (SHAO) Chinese Academy of Sciences All the hard works are done by my student Yang Xinjuan
More informationarxiv: v2 [astro-ph.co] 29 Aug 2016
Mon. Not. R. Astron. Soc. 000, 1 21 (2014) Printed 4 September 2018 (MN LATEX style file v2.2) arxiv:1603.07722v2 [astro-ph.co] 29 Aug 2016 RCSLenS: The Red Cluster Sequence Lensing Survey H. Hildebrandt,
More informationDark Matter & Dark Energy. Astronomy 1101
Dark Matter & Dark Energy Astronomy 1101 Key Ideas: Dark Matter Matter we cannot see directly with light Detected only by its gravity (possible future direct detection in the lab) Most of the matter in
More informationSome issues in cluster cosmology
Some issues in cluster cosmology Tim McKay University of Michigan Department of Physics 1/30/2002 CFCP Dark Energy Workshop 1 An outline Cluster counting in theory Cluster counting in practice General
More informationRefining Photometric Redshift Distributions with Cross-Correlations
Refining Photometric Redshift Distributions with Cross-Correlations Alexia Schulz Institute for Advanced Study Collaborators: Martin White Introduction Talk Overview Weak lensing tomography can improve
More informationShape Measurement: An introduction to KSB
Shape Measurement: An introduction to KSB Catherine Heymans Institute for Astronomy, University of Edinburgh, UK DUEL Weak Lensing School September 2009 at the end of the week you ll be able to... Use
More informationThe Formation and Evolution of Galaxy Clusters
Distant Clusters of Galaxies Ringberg, October, 2005 The Formation and Evolution of Galaxy Clusters Simon D.M. White Max Planck Institute for Astrophysics Bennett et al 2003 > 105 near-independent 5 temperature
More informationBackground Picture: Millennium Simulation (MPA); Spectrum-Roentgen-Gamma satellite (P. Predehl 2011)
By Collaborators Alex Kolodzig (MPA) Marat Gilfanov (MPA,IKI), Gert Hütsi (MPA), Rashid Sunyaev (MPA,IKI) Publications Kolodzig et al. 2013b, A&A, 558, 90 (ArXiv : 1305.0819) Hüsti et al. 2014, submitted
More informationStudy of environment in galaxy surveys
Post-doc Days DIFA+INAF(Bo) 5-6 February 2015 Study of environment in galaxy surveys Olga Cucciati Universita' di Bologna - DIFA INAF-Osservatorio Astronomico di Bologna My Gelmini countdown: 1 year and
More informationThe shapes of faint galaxies: A window unto mass in the universe
Lecture 15 The shapes of faint galaxies: A window unto mass in the universe Intensity weighted second moments Optimal filtering Weak gravitational lensing Shear components Shear detection Inverse problem:
More informationThe Power. of the Galaxy Power Spectrum. Eric Linder 13 February 2012 WFIRST Meeting, Pasadena
The Power of the Galaxy Power Spectrum Eric Linder 13 February 2012 WFIRST Meeting, Pasadena UC Berkeley & Berkeley Lab Institute for the Early Universe, Korea 11 Baryon Acoustic Oscillations In the beginning...
More informationDark Matter. Homework 3 due. ASTR 433 Projects 4/17: distribute abstracts 4/19: 20 minute talks. 4/24: Homework 4 due 4/26: Exam ASTR 333/433.
Dark Matter ASTR 333/433 Today Clusters of Galaxies Homework 3 due ASTR 433 Projects 4/17: distribute abstracts 4/19: 20 minute talks 4/24: Homework 4 due 4/26: Exam Galaxy Clusters 4 distinct measures:
More informationImaging the Dark Universe with Euclid
Imaging the Dark Universe with Simon Lilly (ETH Zurich) on behalf of Alexandre Refregier (CEA Saclay) for the Imaging Consortium Conference ESTEC 17/11/09 1 Science Objectives Outstanding questions in
More informationCosmology on the Beach: Experiment to Cosmology
Image sky Select targets Design plug-plates Plug fibers Observe! Extract spectra Subtract sky spec. Cosmology on the Beach: Experiment to Cosmology Fit redshift Make 3-D map Test physics! David Schlegel!1
More informationMeasuring Neutrino Masses and Dark Energy
Huitzu Tu UC Irvine June 7, 2007 Dark Side of the Universe, Minnesota, June 5-10 2007 In collaboration with: Steen Hannestad, Yvonne Wong, Julien Lesgourgues, Laurence Perotto, Ariel Goobar, Edvard Mörtsell
More informationarxiv: v2 [astro-ph.co] 7 Jan 2013
Mon. Not. R. Astron. Soc., 1 18 (29) Printed 8 January 213 (MN LATEX style file v2.2) CFHTLenS: Combined probe cosmological model comparison using 2D weak gravitational lensing arxiv:1212.3338v2 [astro-ph.co]
More informationWeak Lensing: a Probe of Dark Matter and Dark Energy. Alexandre Refregier (CEA Saclay)
Weak Lensing: a Probe of Dark Matter and Dark Energy Alexandre Refregier (CEA Saclay) SLAC August 2004 Concordance ΛCDM Model Outstanding questions: initial conditions (inflation?) nature of the dark matter
More informationModern Cosmology / Scott Dodelson Contents
Modern Cosmology / Scott Dodelson Contents The Standard Model and Beyond p. 1 The Expanding Universe p. 1 The Hubble Diagram p. 7 Big Bang Nucleosynthesis p. 9 The Cosmic Microwave Background p. 13 Beyond
More informationBasic BAO methodology Pressure waves that propagate in the pre-recombination universe imprint a characteristic scale on
Precision Cosmology With Large Scale Structure, Ohio State University ICTP Cosmology Summer School 2015 Lecture 3: Observational Prospects I have cut this lecture back to be mostly about BAO because I
More informationAstronomical image reduction using the Tractor
the Tractor DECaLS Fin Astronomical image reduction using the Tractor Dustin Lang McWilliams Postdoc Fellow Carnegie Mellon University visiting University of Waterloo UW / 2015-03-31 1 Astronomical image
More informationElliptical galaxies as gravitational lenses
Elliptical galaxies as gravitational lenses Raphaël Gavazzi UC Santa Barbara R. Gavazzi, Séminaire IAP, 22/12/06, 1 Outline Issues on Early-Type Galaxies (ETGs) Gravitational lensing, the basics SLACS:
More informationMapping Baryonic & Dark Matter in the Universe
Mapping Baryonic & Dark Matter in the Universe Jean-Paul KNEIB Laboratoire d Astrophysique de Marseille, France A. Leauthaud, R. Massey, J. Rhodes, the COSMOS team, and many others Outline Motivation Basics
More informationEuclid and MSE. Y. Mellier IAP and CEA/SAp.
Euclid and MSE Y. Mellier IAP and CEA/SAp www.euclid-ec.org Euclid and MSE CFHT Users Meeting, Nice 02 May, 2016 Euclid Primary Objectives: the Dark Universe Understand The origin of the Universe s accelerating
More informationBrief update (3 mins/2 slides) on astrophysics behind final project
Nov 1, 2017 Brief update (3 mins/2 slides) on astrophysics behind final project Evidence for Dark Matter Next Wed: Prelim #2, similar to last one (30 mins). Review especially lecture slides, PEs and non-project
More informationExamining Dark Energy With Dark Matter Lenses: The Large Synoptic Survey Telescope. Andrew R. Zentner University of Pittsburgh
Examining Dark Energy With Dark Matter Lenses: The Large Synoptic Survey Telescope Andrew R. Zentner University of Pittsburgh 1 Overview The contents of the Universe The accelerating Universe and Dark
More informationWL and BAO Surveys and Photometric Redshifts
WL and BAO Surveys and Photometric Redshifts Lloyd Knox University of California, Davis Yong-Seon Song (U Chicago) Tony Tyson (UC Davis) and Hu Zhan (UC Davis) Also: Chris Fassnacht, Vera Margoniner and
More informationToday. Gravitational Lenses 11/19/2013. Astronomy Picture of the Day
ASTR 1020: Stars & Galaxies November 15, 2013 Reading for Monday: Chapter 23, section 23.1-23.3. MasteringAstronomy homework on Galaxy Evolution is due tonight at midnight. Exam 3 is on Wednesday, Nov.
More informationarxiv: v1 [astro-ph.co] 11 Dec 2015
Mon. Not. R. Astron. Soc. 000, 000 000 (0000) Printed 24 July 2018 (MN LaT E X style file v2.2) arxiv:1512.03625v1 [astro-ph.co] 11 Dec 2015 RCSLenS: A new estimator for large-scale galaxy-matter correlations
More informationExploring Dark Matter through Gravitational Lensing. Exploring the Dark Universe Indiana University June 2007
Exploring Dark Matter through Gravitational Lensing Exploring the Dark Universe Indiana University 28-29 June 2007 What is a Gravitational Lens? A gravitational lens is formed when the light from a distant,
More informationGravitational lensing
Gravitational lensing Martin White UC Berkeley Collaborators: Alexandre Amblard Henk Hoekstra Masahiro Takada Shirley Ho Dragan Huterer Ludo van Waerbeke Chris Vale Outline What and why? Background and
More informationAn Introduction to the Dark Energy Survey
An Introduction to the Dark Energy Survey A study of the dark energy using four independent and complementary techniques Blanco 4m on Cerro Tololo Galaxy cluster surveys Weak lensing Galaxy angular power
More informationRADIO-OPTICAL-cmb SYNERGIES. Alkistis Pourtsidou ICG Portsmouth
RADIO-OPTICAL-cmb SYNERGIES Alkistis Pourtsidou ICG Portsmouth Image credit: Hayden Planetarium, 2014 New Frontiers in Observational Cosmology [Planck 2015] 95% of our Universe is very strange - new physics!
More informationTMT and Space-Based Survey Missions
TMT and Space-Based Survey Missions Daniel Stern Jet Propulsion Laboratory/ California Institute of Technology 2014 California Institute of Technology TMT Science Forum 2014 July 17 Outline Summary of
More informationObservational Cosmology
Astr 102: Introduction to Astronomy Fall Quarter 2009, University of Washington, Željko Ivezić Lecture 15: Observational Cosmology 1 Outline Observational Cosmology: observations that allow us to test
More informationGravitational Lensing with Euclid
Gravitational Lensing with Euclid Y. Mellier on behalf of the Euclid Consortium www.euclid-ec.org Gravitational Lensing with Euclid GravLens, Leiden, JUL 15 2016 Euclid Top Level Science Requirements Sector
More informationWeak Lensing (and other) Measurements from Ground and Space Observatories
Weak Lensing (and other) Measurements from Ground and Space Observatories Gary Bernstein CfCP Workshop 12/16/01 1. Present State of the Art: New Results from the CTIO Weak Lensing Survey. Mike Jarvis GMB,
More informationDark Matter: Finding the Invisible
Dark Matter: Finding the Invisible Laura Storch Boston University WR150 LA Image courtesy of Hubble Deep Field Overview: Dark Matter: -Why do we think it exists? -Observational evidence -What are its properties?
More informationBaryon Acoustic Oscillations and Beyond: Galaxy Clustering as Dark Energy Probe
Baryon Acoustic Oscillations and Beyond: Galaxy Clustering as Dark Energy Probe Yun Wang Univ. of Oklahoma II Jayme Tiomno School of Cosmology August 6-10, 2012 Plan of the Lectures Lecture I: Overview
More informationConstraining Fundamental Physics with Weak Lensing and Galaxy Clustering. Roland de Pu+er JPL/Caltech COSMO- 14
Constraining Fundamental Physics with Weak Lensing and Galaxy Clustering Roland de Pu+er JPL/Caltech COSMO- 14 Galaxy Clustering: - 3D maps of galaxies - > 3D power spectrum P(k,mu) - BOSS: V = 4.4 (h-
More informationBaryon Acoustic Oscillations Part I
Baryon Acoustic Oscillations Part I Yun Wang (on behalf of the Euclid collaboration) ESTEC, November 17, 2009 Outline Introduction: BAO and galaxy clustering BAO as a standard ruler BAO as a robust dark
More informationIntroducing DENET, HSC, & WFMOS
RESCEU & JSPS core-tocore program DENET Summer School Dark energy in the universe September 1-4, 2007 Introducing DENET, HSC, & WFMOS Yasushi Suto Department of Physics, The University of Tokyo 1 International
More informationEuclid. Mapping the Geometry of the Dark Universe. Y. Mellier on behalf of the. Euclid Consortium.
Mapping the Geometry of the Dark Universe Y. Mellier on behalf of the http://www.euclid-ec.org Instrument Overall WP Breakdown VG :1 The ESA mission: scientific objectives Understand the origin of the
More informationDark Matter. Galaxy Counts Redshift Surveys Galaxy Rotation Curves Cluster Dynamics Gravitational Lenses ~ 0.3 Ω M Ω b.
Dark Matter Galaxy Counts Redshift Surveys Galaxy Rotation Curves Cluster Dynamics Gravitational Lenses Ω M ~ 0.3 2 1 Ω b 0.04 3 Mass Density by Direct Counting Add up the mass of all the galaxies per
More informationFeb-2015 Hervé Dole, IAS - M2NPAC Advanced Cosmology - Dole/Joyce/Langer 1. problem?
Hervé Dole introduction to the structured universe why is the night sky dark? 1. why galaxy formation is a problem? 2. how to adress these problems? 3. overview of observation facts 4. overview of structure
More informationPhysics of the Universe: Gravitational Lensing. Chris Fassnacht UC Davis
Physics of the Universe: Gravitational Lensing Chris Fassnacht UC Davis The motivation The big question: What is dark energy? More specifically Obtain independent measurements of cosmological parameters
More informationChapter 16 Dark Matter, Dark Energy, & The Fate of the Universe
16.1 Unseen Influences Chapter 16 Dark Matter, Dark Energy, & The Fate of the Universe Dark Matter: An undetected form of mass that emits little or no light but whose existence we infer from its gravitational
More informationShear Power of Weak Lensing. Wayne Hu U. Chicago
Shear Power of Weak Lensing 10 3 N-body Shear 300 Sampling errors l(l+1)c l /2π εε 10 4 10 5 Error estimate Shot Noise θ y (arcmin) 200 100 10 6 100 1000 l 100 200 300 θ x (arcmin) Wayne Hu U. Chicago
More informationCross-Correlation of CFHTLenS Galaxy Catalogue and Planck CMB Lensing
Cross-Correlation of CFHTLenS Galaxy Catalogue and Planck CMB Lensing A 5-month internship under the direction of Simon Prunet Adrien Kuntz Ecole Normale Supérieure, Paris July 08, 2015 Outline 1 Introduction
More informationToday: Start Ch. 18: Cosmology. Homework # 5 due next Wed. (HW #6 is online)
Today: Start Ch. 18: Cosmology Homework # 5 due next Wed. (HW #6 is online) Dark Matter! A rotation curve is a graph of how fast a something is rotating, as a function of distance from the center.! We
More informationWeak Gravitational Lensing. Gary Bernstein, University of Pennsylvania KICP Inaugural Symposium December 10, 2005
Weak Gravitational Lensing Gary Bernstein, University of Pennsylvania KICP Inaugural Symposium December 10, 2005 astrophysics is on the 4th floor... President Amy Gutmann 215 898 7221 Physics Chair Tom
More informationCosmology on small scales: Emulating galaxy clustering and galaxy-galaxy lensing into the deeply nonlinear regime
Cosmology on small scales: Emulating galaxy clustering and galaxy-galaxy lensing into the deeply nonlinear regime Ben Wibking Department of Astronomy Ohio State University with Andres Salcedo, David Weinberg,
More informationFundamental cosmology from the galaxy distribution. John Peacock Hiroshima 1 Dec 2016
Fundamental cosmology from the galaxy distribution John Peacock Subaru @ Hiroshima 1 Dec 2016 What we learn from LSS Fundamental: Astrophysical: Matter content (CDM, baryons, neutrino mass) Properties
More informationNeutrinos and cosmology
Neutrinos and cosmology Yvonne Y. Y. Wong RWTH Aachen LAUNCH, Heidelberg, November 9--12, 2009 Relic neutrino background: Temperature: 4 T,0 = 11 Origin of density perturbations? 1 /3 T CMB, 0=1.95 K Number
More informationAspects of large-scale structure. John Peacock UniverseNet Mytilene Sept 2007
Aspects of large-scale structure John Peacock UniverseNet Mytilene Sept 2007 WMAP 2003 2dFGRS cone diagram: 4-degree wedge 220,000 redshifts 1997-2003 Simulating structure formation The Virgo consortium
More informationMoment of beginning of space-time about 13.7 billion years ago. The time at which all the material and energy in the expanding Universe was coincident
Big Bang Moment of beginning of space-time about 13.7 billion years ago The time at which all the material and energy in the expanding Universe was coincident Only moment in the history of the Universe
More informationThe gas-galaxy-halo connection
The gas-galaxy-halo connection Jean Coupon (University of Geneva) Collaborators: Miriam Ramos, Dominique Eckert, Stefano Ettori, Mauro Sereno, Keiichi Umetsu, Sotiria Fotopoulou, Stéphane Paltani, and
More informationWeak lensing calibrated scaling relations for galaxy groups and clusters in the COSMOS and CFHTLS fields
Weak lensing calibrated scaling relations for galaxy groups and clusters in the COSMOS and CFHTLS fields Kimmo Kettula COSMOS, CFHTLenS and XMM-CFHTLS collaborations 06/19/2014 1 Introduction Mass calibration
More informationWhat can Cosmology tell us about Gravity? Levon Pogosian Simon Fraser University
What can Cosmology tell us about Gravity? Levon Pogosian Simon Fraser University Rob Crittenden ICG, Portsmouth Kazuya Koyama ICG, Portsmouth Simone Peirone U. Leiden Alessandra Silvestri U. Leiden Marco
More informationarxiv: v1 [astro-ph.co] 16 Oct 2013
Nonlocal Gravity and Structure in the Universe Scott Dodelson 1, 2, 3 and Sohyun Park 4 1 Fermilab Center for Particle Astrophysics, Fermi National Accelerator Laboratory, Batavia, IL 60510-0500 2 Kavli
More informationPHY323:Lecture 7 Dark Matter with Gravitational Lensing
PHY323:Lecture 7 Dark Matter with Gravitational Lensing Strong Gravitational Lensing Theory of Gravitational Lensing Weak Gravitational Lensing Large Scale Structure Experimental Evidence for Dark Matter
More informationInvestigating Cluster Astrophysics and Cosmology with Cross-Correlation of Thermal Sunyaev-Zel dovich Effect and Weak Lensing
Investigating Cluster Astrophysics and Cosmology with Cross-Correlation of Thermal Sunyaev-Zel dovich Effect and Weak Lensing 2017/7/14 13th Rencontres du Vietnam: Cosmology Ken Osato Dept. of Physics,
More informationCFHTLenS: testing the laws of gravity with tomographic weak lensing and redshift-space distortions
MNRAS 429, 2249 2263 (2013) doi:10.1093/mnras/sts493 CFHTLenS: testing the laws of gravity with tomographic weak lensing and redshift-space distortions Fergus Simpson, 1 Catherine Heymans, 1 David Parkinson,
More informationCooking with Strong Lenses and Other Ingredients
Cooking with Strong Lenses and Other Ingredients Adam S. Bolton Department of Physics and Astronomy The University of Utah AASTCS 1: Probes of Dark Matter on Galaxy Scales Monterey, CA, USA 2013-July-17
More information