Aldo Morselli INFN Roma Tor Vergata

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1 Astrophysics in the MeV range Aldo Morselli INFN Roma Tor Vergata 17th Lomonosov Conference on Elementary Particle Physics Moscow State University, Moscow, August, 2015 Aldo Morselli, INFN Roma Tor Vergata 1

2 MAGIC HESS Veritas CTA Cosmic rays: about 10 Myears in the Galaxy (6-7 g/cm2) ARGO-JBJ Milagro HAWC LHAASO Atmosphere 40 km 23 Xo Source γ" ν" High Montain Detectors Cherencov Detectors Particle Accelerators further acceleration? Cosmic Rays creation acceleration injection Propagation Modulation Space experiments ~ 400 km Direct detection Balloons ~ 40 km ~3 g/cm 2 residual atmosphere Extensive Air Shower Detectors Particle Astrophysics Experiments (future in red) Fermi PAMELA AGILE AMS Cream KASCADE Grande DECOR AUGER NEMO ANTARES IceCube Km3 Underground, Under-ice, Underwater Dampe Gamma-400 HERD AstroGam Pangu Aldo Morselli, INFN Roma Tor Vergata 2

3 The Low Energy frontier Aldo Morselli, INFN Roma Tor Vergata 3

4 coverage of the electromagnetic spectrum 4 total external reflection Cerenkov mirror telescopes grazing incidence coded apertures Compton scattering pair tracking air sub-mm/ir UV x-rays gamma-rays water Aldo Morselli, INFN Roma Tor Vergata 4

5 Aldo Morselli, INFN Roma Tor Vergata 5

6 the MeV energy range: the last frontier mostly unexplored crucial energy range: transition from quasi-thermal (Comptonized) to nonthermal processes. Aldo Morselli, INFN Roma Tor Vergata 6

7 1-100 MeV unexplored domain for Dark Matter searches Galactic compact stars and nucleosynthesis Cosmic rays Relativistic jets, microquasars Blazars Gamma-Ray Bursts Solar physics and Terrestrial Gamma-Ray Flashes Aldo Morselli, INFN Roma Tor Vergata 7

8 Neutralino WIMPs Assume χ present in the Galactic halo χ is its own antiparticle => can annihilate in galactic halo producing gamma-rays, antiprotons, positrons. Antimatter not produced in large quantities through standard processes (secondary production through p + p --> anti p + X) So, any extra contribution from exotic sources (χ χ annihilation) is an interesting signature ie: χ χ --> anti p + X Produced from (e. g.) χ χ --> q / g / gauge boson / Higgs boson and subsequent decay and/ or hadronisation. Aldo Morselli, INFN Roma Tor Vergata 8

9 Annihilation channels Aldo Morselli, INFN Roma Tor Vergata 9

10 Differential yield for each annihilation channel Quite distinctive spectrum (no power-law) solid lines are the total yields, while the dashed lines are components not due to π 0 decays WIMP mass=200gev A.Cesarini, F.Fucito, A.Lionetto, A.Morselli, P.Ullio, Astroparticle Physics, 21, 267, 2004 [astro-ph/ ] Aldo Morselli, INFN Roma Tor Vergata 10

11 Differential yield for b bar for different neutralino mass neutralino mass A.Cesarini, F.Fucito, A.Lionetto, A.Morselli, P.Ullio, Astroparticle Physics, 21, , 2004 [astro-ph/ ] Aldo Morselli, INFN Roma Tor Vergata 11

12 Differential yield for b bar for different neutralino mass Low energy range is very important also for high mass neutralino search neutralino mass A.Cesarini, F.Fucito, A.Lionetto, A.Morselli, P.Ullio, Astroparticle Physics, 21, , 2004 [astro-ph/ ] Aldo Morselli, INFN Roma Tor Vergata 12

13 log ρ(r) r -1 r -3 log (r) High DM density at the Galactic center Aldo Morselli, INFN Roma Tor Vergata 13

14 Sun Annihilation radiation from the GC Aldo Morselli, INFN Roma Tor Vergata 14

15 Milky Way Dark Matter Profiles All profiles are normalized to the local density 0.3 GeV cm 3 at the Sun s location r 8.5 kpc A.Lapi, A.Paggi, A.Cavaliere, A.Lionetto, A.Morselli, V.Vitale. A&A 510, A90 (2010) [arxiv: ] Aldo Morselli, INFN Roma Tor Vergata 15

16 Different spatial behaviour for decaying or annihilating dark matter The angular profile of the gamma-ray signal is shown, as function of the angle to the centre of the galaxy for a Navarro-Frenk-White (NFW) halo distribution for decaying DM, solid (red) line, compared to the case of self-annihilating DM, dashed (blue) line Aldo Morselli, INFN Roma Tor Vergata 16

17 The Galactic Center with Fermi-LAT Fermi LAT GeV Aldo Morselli, INFN Roma Tor Vergata 17

18 Spectrum (E> 400 MeV, 7 x7 region centered on the Galactic Center analyzed with binned likelihood analysis ) data (stat. error) preliminary best diffuse model and isotropic emission 12 Fermi 1 year catalog sources V.Vitale, A.Morselli, Fermi Coll. NIM A630 (2011) 147, arxiv: Aldo Morselli, INFN Roma Tor Vergata 18

19 The GeV excess 7 x7 region centered on the Galactic Center 11 months of data, E >400 MeV, front-converting events analyzed with binned likelihood analysis )! The systematic uncertainty of the effective area (blue area) of the LAT is ~10% at 100 MeV, decreasing to 5% at 560 MeV and increasing to 20% at 10 GeV V.Vitale, A.Morselli, Fermi Coll. NIM A630 (2011) 147, arxiv: Aldo Morselli, INFN Roma Tor Vergata 19

20 the GALACTIC CENTER : any hints of Dark Matter? the beginning of the history Possible Evidence For Dark Matter Annihilation In The Inner Milky Way From The Fermi Gamma Ray Space Telescope Lisa Goodenough, Dan Hooper arxiv: Oct 2009 Indirect Search for Dark Matter from the center of the Milky Way with the Fermi-Large Area Telescope Vincenzo Vitale, Aldo Morselli, the Fermi/LAT Collaboration Proceedings of the 2009 Fermi Symposium, 2-5 November 2009, econf Proceedings C arxiv: Dec 2009 Search for Dark Matter with Fermi Large Area Telescope: the Galactic Center V.Vitale, A.Morselli, the Fermi/LAT Collaboration Nuclear Instruments and Methods in Physics Research A 630 (2011) (Available online 23 June 2010) Dark Matter Annihilation in The Galactic Center As Seen by the Fermi Gamma Ray Space Telescope Dan Hooper, Lisa Goodenough. (21 March 2011 ). 21 pp. Published in Phys.Lett. B697 (2011) On The Origin Of The Gamma Rays From The Galactic Center Dan Hooper, Tim Linden. Oct pp. Published in Phys.Rev. D84 (2011) Detection of a Gamma-Ray Source in the Galactic Center Consistent with Extended Emission from Dark Matter Annihilation and Concentrated Astrophysical Emission Kevork N. Abazajian, Manoj Kaplinghat (UC, Irvine). Jul pp. Published in Phys.Rev. D86 (2012) Dark Matter and Pulsar Model Constraints from Galactic Center Fermi-LAT Gamma Ray Observations Chris Gordon, Oscar Macías (Canterbury U.). Jun 24, pp. Published in Phys.Rev. D88 (2013) The Characterization of the Gamma-Ray Signal from the Central Milky Way: A Compelling Case for Annihilating Dark Matter Tansu Daylan, Douglas P. Finkbeiner, Dan Hooper, Tim Linden, Stephen K. N. Portillo, Nicholas L. Rodd, Tracy R. Slatyer. Feb 26, pp. e-print: arxiv: [astro-ph.he] Aldo Morselli, INFN Roma Tor Vergata 20

21 The GeV excess A lot of activity outside the Fermi collaboration with claims of evidence for dark matter in the Galactic Center i.e. Calore et al, arxiv: v1 Aldo Morselli, INFN Roma Tor Vergata 21

22 Galactic Center and Dark Matter arxiv: Se non è vero è ben trovato ( If it is not true, it is well conceived ) arxiv: Aldo Morselli, INFN Roma Tor Vergata 22

23 The GeV excess : Other explanations exist past activity of the Galactic center (e.g. Petrovic et al., arxiv: , Carlson & Profumo arxiv: ) Population of millisecond Pulsars around the Galactic Center ( e.g. Hooper et al. arxiv: , Yuan and Zhang arxiv: v1 Lee et al. arxiv: ) Series of Leptonic Cosmic-Ray Outbursts Cholis et al. arxiv: Different diffusion coefficent in the GC region.. How to discriminate between different hypotesis? Aldo Morselli, INFN Roma Tor Vergata 23

24 The Fermi LAT 2FGL Inner Galactic Region August 4, 2008, to July 31, MeV to 100 GeV energy range Fermi Coll. ApJS (2012) 199, 31 arxiv: Aldo Morselli, INFN Roma Tor Vergata 24

25 ARE WE SEEING DARK MATTER WITH THE FERMI-LAT IN A REGION AROUND THE MILKY WAY CENTER? Maybe yes, but we can t be sure as far as we don t understand the background at the level needed for disentangle a DM-induced γ-ray flux in this interesting region. It would be really very nice to have a new experiment with better angular resolution at energies below 100 MeV Aldo Morselli, INFN Roma Tor Vergata 25

26 Constraints from the inner Galaxy Optimized ROI for each profile Einasto NFW JCAP 10 (2013) 029 [arxiv: ] NFWc Burkert Aldo Morselli, INFN Roma Tor Vergata 26

27 Constraints from the inner Galaxy 3 σ upper limits on the annihilation cross-section for different channels and halo profiles No assumption on background very robust result JCAP 10 (2013) 029 arxiv: Aldo Morselli, INFN Roma Tor Vergata 27

28 Low energy lines limits and implications for gravitino dark matter in the µνssm excluded Excluded region JCAP 10(2014) 023,[arXiv: ] Aldo Morselli, INFN Roma Tor Vergata 28

29 New Low Energy Line Search Modeling effective area background emission not masking known point sources: because the broad PSF of the LAT at low energies. Excluded region This Analysis is Systematics Limited JCAP 10(2014) 023,[arXiv: ] To improve this search better energy and angular resolutions at energies below 100 MeV are needed Aldo Morselli, INFN Roma Tor Vergata 29

30 Dwarf spheroidal galaxies (dsph) : promising targets for DM detection Aldo Morselli, INFN Roma Tor Vergata 30

31 Dwarf Spheroidal Galaxies upper-limits No detection by Fermi with 11 months of data. 95% flux upper limits are placed for several possible annihilation final states. Flux upper limits are combined with the DM density inferred by the stellar data (*) for a subset of 8 dsph (based on quality of stellar data) to extract constraints on < v> vs WIMP mass for specific DM models (*) stellar data from the Keck observatory (by Martinez, Bullock, Kaplinghat) Fermi Coll. ApJ 712 (2010) [arxiv: ] Aldo Morselli, INFN Roma Tor Vergata 31

32 Dwarf Spheroidal Galaxies combined analysis robust constraints including J-factor uncertainties from the stellar data statistical analysis NFW. For cored dark matter profile, the J-factors for most of the dsphs would either increase or not change much Fermi Lat Coll., PRL 107, (2011) [arxiv: ] Aldo Morselli, INFN Roma Tor Vergata 32

33 Dwarf Spheroidal Galaxies upper-limits 15 Dwarfs 4-year data 500 MeV to 500GeV M.Ackermann et al., [Fermi Coll.] Phys.Rev.D 89, (2014)[arXiv: ] Aldo Morselli, INFN Roma Tor Vergata 33

34 Dwarf Spheroidal Galaxies upper-limits (6 years ) 6-year data 500 MeV to 500GeV 15 Dwarfs M.Ackermann et al., [Fermi Coll.] PRL Accepted [arxiv: ] Aldo Morselli, INFN Roma Tor Vergata 34

35 Dwarf Spheroidal Galaxies upper-limits (6 years ) Astrogam range M.Ackermann et al., [Fermi Coll.] PRL Accepted [arxiv: ] Aldo Morselli, INFN Roma Tor Vergata 35

36 Upper limits from AMS antiprotons and Fermi LAT for different halo profiles Jin et al., arxiv: Fermi data from M.Ackermann et al., [Fermi Coll.] PRL accepted [arxiv: ] Aldo Morselli, INFN Roma Tor Vergata 36

37 Upper limits from Fermi LAT, Antares, IceCube, Magic IceCube 79 Galactic Center Pamela/Fermi/AMS positron excess Pamela positron excess positron excess Fermi Lat Dwarfs limit Antares Coll. arxiv: IceCube Coll. arxiv: Aldo Morselli, INFN Roma Tor Vergata 37

38 ATLAS-Fermi Results Atlas Fermi Atlas Atlas Coll. JHEP 1304 (2013) 075 arxiv: Aldo Morselli, INFN Roma Tor Vergata 38

39 Complementarity and Searches for Dark Matter in the pmssm Direct Search LHC CTA Cahill-Rowley et al. arxiv: Aldo Morselli, INFN Roma Tor Vergata 39

40 Dwarf Spheroidal Galaxies upper-limits (6 years ) Astrogam range - M.Ackermann et al., [Fermi Coll.] PRL Accepted [arxiv: ] Aldo Morselli, INFN Roma Tor Vergata 40

41 2015: An interesting start DES Year 1 Survey Found 8 new dwarf candidates! figure in DES discovery paper LAT Collaboration DES Collaboration agreement Feb first joint paper Search for Gamma-Ray Emission from DES Dwarf Spheroidal Galaxy Candidates with Fermi-LAT Data arxiv: analysis of observations of 8 new Dwarf Spheroidal Galaxies found by DES: Bechtol, et al. arxiv: also found by Koposov, et al. arxiv: Aldo Morselli, INFN Roma Tor Vergata 41

42 New DES Dwarf Spheroidal Galaxy Candidates (Reticulum II) A.Drlica-Wagner et al. [Fermi and DES Coll.] ApJ Letters 2015,809,L4 [arxiv: ] Aldo Morselli, INFN Roma Tor Vergata 42

43 New DES Dwarf Spheroidal Galaxy Candidates Scroll down for video! Based on arxiv: and arxiv: Aldo Morselli, INFN Roma Tor Vergata 43

44 New DES Dwarf Spheroidal Galaxy Candidates A.Drlica-Wagner et al. [Fermi and DES Coll.] ApJ Letters 2015,809,L4 [arxiv: ] Aldo Morselli, INFN Roma Tor Vergata 44

45 New DES Dwarf Spheroidal Galaxy Candidates ( Reticulum II ) A.Drlica-Wagner et al. [Fermi and DES Coll.] ApJ Letters 2015,809,L4 [arxiv: ] Aldo Morselli, INFN Roma Tor Vergata 45

46 Power~ 400 W Weight Tracker ~110 Kg Weight Calorimeter ~60 Kg Total weight ~ 600 Kg Gamma-light project Aldo Morselli, INFN Roma Tor Vergata 46

47 GAMMA$LIGHT) First'proposed'in'2012'for'the'ESA'Call'of'Small'Scien:fic' Missions.' sensi:vity'in'the'range'10$100)mev.' Very)high)level)of)readiness)(AGILE,)Fermi))heritage).' New)astrophysics)in'the'range'below'100'MeV'for'both' Galac:c'and'extragalac:c'sources' Aldo Morselli, INFN Roma Tor Vergata 47

48 GAMMA-LIGHT: the instrument (total weight: 260 kg) Silicon'Tracker'with'analog)readout)and' ))))no)heavy)absorber)(10'mev' '1'GeV)' ' CsI'Calorimeter'(200'keV' '200'MeV)' ' An:coincidence' ' Data'Handling' Aldo Morselli, INFN Roma Tor Vergata 48

49 Gamma-light Simulation Aldo Morselli, INFN Roma Tor Vergata 49

50 Gamma-Light Point Spread Function (angular resolution) AGILE 30 0 GAMMA-LIGHT 30 0 Fermi LAT ( Front + Back) Fermi LAT front P7v6 A.Morselli et al., Nuclear Physics B Proc. Supp (2013) [arxiv: ] Aldo Morselli, INFN Roma Tor Vergata 50

51 Effective area Fermi LAT ( Front + Back) Fermi LAT ( Front) GAMMA-LIGHT 30 0 AGILE 30 0 COMPTEL Kalman reconstruction, assumed bkg rejection eff A.Morselli et al., Nuclear Physics B Proc. Supp (2013) [arxiv: ] Aldo Morselli, INFN Roma Tor Vergata 51

52 ESA)M$4)Call) quite)different)from)previous)medium$sized)mission) Calls)(Solar)Orbiter,)EUCLID,)PLATO);) total)esa)budget:)450)meuro.) guidelines)for)an) ESA$only )mission:) Payload)mass:)300)kg;) total)spacecrax)mass:)800)kg.) Aldo Morselli, INFN Roma Tor Vergata 52

53 ESA)M$4)Call) idea)of)) marriage )with)a)compton)telescope) sensizve)in)the)range)))))))))))))))))))))))))))))))200)kev) )10) MeV.) ) possible)merging)with)the)astro$mev)group.) ) Science,)Instrument,)Community.) ' Aldo Morselli, INFN Roma Tor Vergata 53

54 the) MeV$GeV )concept) range))200)kev) )100)MeV:)new)window.) ) sensizvity)(conznuum)and)lines))be^er)than)integral,) COMPTEL,)AGILE)and)FERMI)by)a)factor)10$20.) ) Two)opZons)under)consideraZons:) One)single)instrument)for)Compton)and)pair) Two)instruments)on)board)the)same)spacecraX) ' Aldo Morselli, INFN Roma Tor Vergata 54

55 ASTROGAM) Aldo Morselli, INFN Roma Tor Vergata 55

56 ASTROGAM a unified proposal from the entire gamma-ray community heritage CLAIRE M1/M2 (2007) M3 (2010) S1 (2012) M4 NCT GRI DUAL CAPSITT COMPTEL GRIPS I GRIPS II ASTROGAM AGILE 2007 FERMI 2008 Gamma-Light Aldo Morselli, INFN Roma Tor Vergata 56

57 An instrument that combine two detection techniques AC system Tracker Calorimeter Aldo Morselli, INFN Roma Tor Vergata 57

58 ASTROGAM Silicon Tracker 58 70'layers'of'6 6'double'sided'Si'strip'detectors'=' 2520'DSSDs''' Each'DSSD'has'a'total'area'of' 'cm 2,'a' thickness'of'400'µm,'a'strip'width'of'100'µm'and' pitch'of'240'µm'(384'strips'per'side),'and'a'guard' ring'of'1.5'mm' Spacing'of'the'Si'layers:'7.5'mm' D'ladders' 322'560'electronic'channels' DSSD'strips'connected'to'ASICs' (32'channels'each)'through'a' pitch'adapter'(dc'coupling)' (72'per'DSSD'side)'' 10'080'ASICs'total' Si'strip' bounding'in' bonding'in'the'agile'si'tracker' Aldo Morselli, INFN Roma Tor Vergata 58

59 Angular resolution (degree) ASTROGAM Angular Resolution COMPTEL ASTROGAM Compton Pair Fermi/LAT Gamma-ray energy (MeV) Aldo Morselli, INFN Roma Tor Vergata 59

60 ASTROGAM view of the Galactic Center Region MeV Fermi PSF Pass7 rep v15 source 2 years, Sources from 3 years Fermi catalog, template ring model for diffuse with Gomez Vargas Aldo Morselli, INFN Roma Tor Vergata 60

61 ASTROGAM view of the Galactic Center Region MeV Fermi PSF Pass7 rep v15 source Sources from two years Fermi catalog, template ring model for diffuse with Gomez Vargas Aldo Morselli, INFN Roma Tor Vergata 61

62 Galactic Center Region GeV Fermi PSF Pass7 rep v15 source Sources from two years Fermi catalog, template ring model for diffuse with Gomez Vargas Aldo Morselli, INFN Roma Tor Vergata 62

63 Galactic Center Region GeV Fermi PSF Pass7 rep v15 source Sources from two years Fermi catalog, template ring model for diffuse with Gomez Vargas Aldo Morselli, INFN Roma Tor Vergata 63

64 ASTROGAM positron annihilation total galactic 511 kev flux sensitivity [ph/cm 2 s 1 ] ASTROGAM Aldo Morselli, INFN Roma Tor Vergata 64

65 SNRs and the Origin and Propagation of CRs Bremsstrahlung AstroGam sensitivity neutral pion decay gamma-ray spectrum of SNRs W44. The red curve shows the expected Astrogam sensitivity for a 1-year effective time integration. Aldo Morselli, INFN Roma Tor Vergata 65

66 Active Galactic Nuclei The SEDs of many blazars (FSRQs) and non-blazar AGNs detected in γ- rays peak in the MeV range Total energy output feedback ASTROGAM Obsercations below 100 MeV are useful to distinguish leptonic and hadronic models AstroGam will detect more than 1000 AGNs (mostly FSRQs) Multi-epoch SEDs of the Flat Spectrum Radio Quasar 3C ASTROGAM will allow us to investigate daily (or sub-daily) SEDs during gamma-ray superflares. 5-σ differential sensitivity for an integration time of 48 hours. - Evolution ( Blazar sequence ) - Origin of UHECRs and HE neutrinos - MeV gamma-ray background Aldo Morselli, INFN Roma Tor Vergata 66

67 SN 2014J Type Ia supernova exploded on 2014 Jan 14 in the starburst galaxy M82 at D 3.5 Mpc nearest SN Ia in more than 40 years Detection with INTEGRAL of gamma-ray lines from 56 Co decay (T 1/2 =77 d) synthesis of 0.6 ± 0.1 M! of 56 Ni (Churazov et al. 2014, Nature, 28 Aug) and from 56 Ni decay (T 1/2 =6,1 d) ~20 d after explosion (Diehl et al. 2014, Science, 5 Sep); 56 Ni lines are broad and redshifted (!) (Isern et al., in prep.) INTEGRAL and NuSTAR observations can not be explained by current SN Ia explosion models (Burrows et al., in prep.) 847 kev 1238 kev Aldo Morselli, INFN Roma Tor Vergata 67

68 Aldo Morselli, INFN Roma Tor Vergata 68

69 AstroGam range Aldo Morselli, INFN Roma Tor Vergata 69

70 DM limit improvement estimate in 15 years with the composite likelihood approach ( ) Here we need a new experi ment Fermi CTA GC Halo 500 h Together Fermi and CTA will probe most of the space of WIMP models with thermal relic annihilation cross section Aldo Morselli, INFN Roma Tor Vergata 70

71 ASTROGAM 3.5 yr survey sensitivity ASTRO-H/SGD 3σ sensitivity for 100 ks exposure of an isolated point source COMPTEL and EGRET sensitivities accumulated during the whole duration of the CGRO mission (9 years) Fermi/LAT 5σ sensitivity for a high Galactic latitude source and after 1 year observation in survey mode ASTROGAM 5σ sensitivity for a high Galactic latitude source after 3.5 years in survey mode Aldo Morselli, INFN Roma Tor Vergata 71

72 ASTROGAM Complementary to CTA and SKA! Aldo Morselli, INFN Roma Tor Vergata 72

73 New gamma projects in space AstroGam 300 KeV- GeV (Proposal to ESA for M4 ) Gamma-light (Proposed to ESA but not approved ) Gamma-400 launch foreseen by MeV 3 TeV, an approved Russian γ-ray satellite. Energy resolution (100 GeV) 1 %. Effective area 0.4 m 2. Angular resolution (100 GeV) Science with Gamma-400 Workshop DAMPE: Satellite of similar performance as Gamma-400. An approved Chinese γ-ray satellite. Planned launch HERD: Instrument on the planned Chinese Space Station. Energy resolution (100 GeV) 1 %. Effective area 1-2 m2. Angular resolution (100 GeV) Planned launch around Shuang-Nan ZHANG Saturday PANGU: suggested as a candidate for the joint small mission between the European Space Agency (ESA) and the Chinese Academy of Science (CAS) Aldo Morselli, INFN Roma Tor Vergata 73

74 An instrument to complete the coverage of the electromagnetic spectrum 74 ASTROGAM total external reflection Cerenkov mirror telescopes grazing incidence coded apertures Compton scattering pair tracking air sub-mm/ir UV x-rays gamma-rays water Aldo Morselli, INFN Roma Tor Vergata 74

75 Conclusions Thank you! Aldo Morselli, INFN Roma Tor Vergata 75