Interaction rayons cosmiques - MIS le contexte hautes énergies
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1 Interaction rayons cosmiques - MIS le contexte hautes énergies Guillaume Dubus remerciements à Pierrick Martin Atelier Astrochimie IPAG novembre 2011 Institut de Planétologie et d Astrophysique de Grenoble 1
2 Diffuse -ray emission interaction of with radiation and matter above 1 GeV (ionisation below) CR F M cloud m p q 4πd 2 q : emissivity for local CR spectrum/density q (>E t ) GeV E t 1.5 atom 1 s 1 > 100 MeV, 2 years Fermi/LAT collaboration 2
3 Diffuse -ray emission interaction of with radiation and matter CR local emissivity qhi residual: isotropic background Fermi/LAT 2009, ApJ, 703 > 100 MeV, 2 years Fermi/LAT collaboration 3
4 Diffuse -ray emission interaction of with radiation and matter measure XCO CR qco/xco=qh2=2qhi emissivity at! energies Fermi/LAT 2010, ApJ, 710 Fermi/LAT 2009, ApJ, 703 > 100 MeV, 2 years Fermi/LAT collaboration 4
5 Diffuse -ray emission interaction of with radiation and matter residuals: dark gas not traced by HI, CO? Fermi/LAT 2010 (1FGL) > 100 MeV, 2 years Fermi/LAT collaboration 5
6 Diffuse -ray emission interaction of with radiation and matter HESS Nature 2006 model smoothed CS map Point sources subtracted GC molecular clouds Tsuboi et al pp interactions (electrons lose energy < 100 yr) -ray spectrum implies CR spectrum Γ"2.3 harder than local and enhanced by factor 3-9 active source in past # 10 kyr to fill this region 6
7 -ray emission from galaxies Fermi/LAT 2010, A&A, 523, L2 7
8 Supernova remnant shells Particle acceleration to 100 TeV E -2 Index ~ 2.0 Cutoff or break at ~20 TeV Index constant across SNR RX J HESS 2007 A&A 464 8
9 SNR & Galactic Cosmic Rays Atoyan+Dermer 2011 Tycho SNR 2 zone leptonic Giordano+ 2011, ArXiv Warren VERITAS 2011, ApJ, 730 9
10 SNR molecular cloud interaction Gabici Nicholas W28 HESS 2008, A&A, 481, Fermi/LAT 2010, ApJ, 718 escaping H CR interacting with nearby molecular clouds Local CR density enhancement factor shocked/unshocked clouds (?) 10
11 SNR molecular cloud interaction Gabici Nicholas W28 HESS 2008, A&A, 481, Fermi/LAT 2010, ApJ, 718 escaping H CR interacting with nearby molecular clouds Local CR density enhancement factor shocked/unshocked clouds (?) 11
12 SNR molecular cloud interaction Gabici Nicholas W28 HESS 2008, A&A, 481, Fermi/LAT 2010, ApJ, 718 escaping H CR interacting with nearby molecular clouds Local CR density enhancement factor shocked/unshocked clouds (?) 12
13 SNR molecular cloud interaction Gabici Nicholas W28 HESS 2008, A&A, 481, Fermi/LAT 2010, ApJ, 718 escaping H CR interacting with nearby molecular clouds Local CR density enhancement factor shocked/unshocked clouds (?) 13
14 SNR molecular cloud interaction H reaccelerated Uchiyama W51C Fiasson [HESS] Gabici escaping H Fermi/LAT 2009, ApJ,
15 SNR molecular cloud interaction + H3 H,H2 low energy cloud chemistry Fiasson [HESS] W51C high energy H 15
16 SNR molecular cloud interaction H3 + H,H2 low energy cloud chemistry Ceccarelli W51C Fiasson [HESS] x100 normal CR ionisation weird cloud chemistry? OH maser trace also CR? Frail
17 Cherenkov Telescope Array angular resolution improved factor 3 sensitivity improved by factor 10 P. Martin, J. Knödlseder, M. Renaud, G. Dubus etc 17
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