Gamma Ray Physics in the Fermi era. F.Longo University of Trieste and INFN

Transcription

1 Gamma Ray Physics in the Fermi era F.Longo University of Trieste and INFN Vulcano, May 22, 2018 F.Longo et al. -- 1

2 Gamma-ray astrophysics above 100 MeV AGILE Fermi 2 Picture of the day, Feb. 28, 2011, NASA-HEASARC

3 Gamma Ray detectors F.Longo et al. -- 3

4 Science topics in HE γ-ray Astrophysics High Energy Cosmic Rays Sources Particle Acceleration mechanisms Highest power gamma-ray sources The propagation of Cosmic Rays The diffuse emission The nature of Dark Matter Multimessenger connections The EM counterparts of GWs F.Longo et al. -- 4

5 EGRET Gamma-ray Sources F.Longo et al. -- 5

6 Solar Flares F.Longo et al. -- 6

7 Solar Flares F.Longo et al. -- 7

8 Supernova Remnants F.Longo et al. -- 8

9 Pulsar Wind Nebulae F.Longo et al. -- 9

10 Pulsars F.Longo et al

11 Pulsars F.Longo et al

12 Active Galactic Nuclei F.Longo et al

13 Active Galactic Nuclei F.Longo et al

14 Gamma-ray Bursts F.Longo et al

15 Gamma Ray Bursts Prompt Emission (GRB ) Delayed Emission (GRB ) F.Longo et al

16 Dark Matter F.Longo et al

17 Dark Matter (?) F.Longo et al

18 EGRET EGRET MeV - 30 GeV - AGN, GRB, Unidentified Sources, Diffuse Bkg 18 F.Longo et al

19 Fermi LAT F.Longo et al

20 The Fermi Observatory LAT GBM NaI Detector GBM BGO Detector F.Longo et al

21 Overview of LAT γ Precision Si-strip Tracker (TKR) 18 XY tracking planes. Single-sided silicon strip detectors (228 µm pitch) Measure the photon direction; gamma ID. Tracker Hodoscopic CsI Calorimeter(CAL) Array of 1536 CsI(Tl) crystals in 8 layers. Measure the photon energy; image the shower. Segmented Anticoincidence Detector (ACD) 89 plastic scintillator tiles. Reject background of charged cosmic rays; segmentation removes self-veto effects at high energy. Electronics System Includes flexible, robust hardware trigger and software filters. ACD [surrounds 4x4 array of TKR towers] e + e Calorimeter Systems work together to identify and measure the flux of cosmic gamma rays with energy 20 MeV - >300 GeV. F.Longo et al

22 Fermi Launch Launch from Cape Canaveral Air Station 11 June 2008 at 12:05PM EDT Circular orbit, 565 km altitude (96 min period), 25.6 deg inclination. F.Longo et al

23 10 th Fermi Anniversary F.Longo et al

24 10 th Fermi Anniversary F.Longo et al

25 10 th Fermi Anniversary F.Longo et al

26 Fermi Highlights and Discoveries GRBs e + e - spectrum Blazars) Radio Galaxies) Starburst Galaxies (4) Globular Clusters (11) Fermi Bubbles LMC & SMC Novae SNRs & PWN (68) γ-ray binaries (6) Pulsars: isolated, binaries, & MSPs (122) Sun: flares & CR interactions TGFs Unidentified Sources)

27 The full sky map F.Longo et al

28 1 FGL catalog Abdo, A. A. et al F.Longo et al

29 2 FGL catalog Nolan, P. L. et al F.Longo et al

30 3 FGL catalog Acero, F. et al F.Longo et al

31 Other catalogs F.Longo et al

32 The Galactic Model Acero et al F.Longo et al

33 The Galactic Background Abdo, A. A. et al F.Longo et al

34 Publications F.Longo et al

35 Data Analysis Software F.Longo et al

36 Publications F.Longo et al

37 Solar Flares Ackermann, M. et al F.Longo et al

38 Supernova Remnants Ackermann et al F.Longo et al

39 Pulsars Clark, C. J. et al F.Longo et al

40 Pulsars Ackermann, M. et al F.Longo et al

41 Pulsar Wind Nebulae Buehler, R. et al F.Longo et al

42 Gamma Ray Novae Abdo, A. A. et al F.Longo et al

43 Gamma Ray Novae Ackermann, M. et al F.Longo et al

44 The Fermi Bubbles Ackermann, M. et al. 2014b F.Longo et al

45 Active Galactic Nuclei Cheung, C.C. et al F.Longo et al

46 Active Galactic Nuclei Ackermann, M. et al F.Longo et al

47 Active Galactic Nuclei Ackermann, M. et al F.Longo et al

48 Extragalactic Background Light Ackermann, M. et al F.Longo et al

49 Searches for Dark Matter Ackermann, M. et al F.Longo et al

50 Searches(for(Dark(Ma.er( Albert, A. et al F.Longo et al

51 Gamma Ray Bursts Ackermann, M. et al. 2014a F.Longo et al

52 Search for EM counterparts of GW Ajello, M. et al F.Longo et al

53 Multimessenger Astrophysics Kadler, M. et al F.Longo et al

54 Multimessenger Astrophysics F.Longo et al

55 GBM/LAT Onboard Triggers 5 5

56 Fast response F.Longo et al

57 Conclusions (I) Fermi is an astroparticle mission exploring the high energy to very high energy gammaray sky. Results from its first 10 years of operations raised significant interest in a broad community of scientists that includes astrophysicists, particle physicists and quantum field theorists. F.Longo et al

58 Conclusions (II) F.Longo et al