Interaction rayons cosmiques - MIS le contexte hautes énergies Guillaume Dubus remerciements à Pierrick Martin Atelier Astrochimie IPAG 24-25 novembre 2011 Institut de Planétologie et d Astrophysique de Grenoble 1
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 ) 10 25 0.1 GeV E t 1.5 atom 1 s 1 > 100 MeV, 2 years Fermi/LAT collaboration 2
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
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
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
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. 1999 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
-ray emission from galaxies Fermi/LAT 2010, A&A, 523, L2 7
Supernova remnant shells Particle acceleration to 100 TeV E -2 Index ~ 2.0 Cutoff or break at ~20 TeV Index constant across SNR RX J1713.7-3946 HESS 2007 A&A 464 8
SNR & Galactic Cosmic Rays Atoyan+Dermer 2011 Tycho SNR 2 zone leptonic Giordano+ 2011, ArXiv Warren+ 2005 VERITAS 2011, ApJ, 730 9
SNR molecular cloud interaction Gabici+ 2009 Nicholas+ 2011 W28 HESS 2008, A&A, 481, Fermi/LAT 2010, ApJ, 718 escaping H CR interacting with nearby molecular clouds Local CR density enhancement factor 10-30 shocked/unshocked clouds (?) 10
SNR molecular cloud interaction Gabici+ 2009 Nicholas+ 2011 W28 HESS 2008, A&A, 481, Fermi/LAT 2010, ApJ, 718 escaping H CR interacting with nearby molecular clouds Local CR density enhancement factor 10-30 shocked/unshocked clouds (?) 11
SNR molecular cloud interaction Gabici+ 2009 Nicholas+ 2011 W28 HESS 2008, A&A, 481, Fermi/LAT 2010, ApJ, 718 escaping H CR interacting with nearby molecular clouds Local CR density enhancement factor 10-30 shocked/unshocked clouds (?) 12
SNR molecular cloud interaction Gabici+ 2009 Nicholas+ 2011 W28 HESS 2008, A&A, 481, Fermi/LAT 2010, ApJ, 718 escaping H CR interacting with nearby molecular clouds Local CR density enhancement factor 10-30 shocked/unshocked clouds (?) 13
SNR molecular cloud interaction H reaccelerated Uchiyama+ 2010 W51C Fiasson+ 2009 [HESS] Gabici+ 2009 escaping H Fermi/LAT 2009, ApJ, 706 14
SNR molecular cloud interaction + H3 H,H2 low energy cloud chemistry Fiasson+ 2009 [HESS] W51C high energy H 15
SNR molecular cloud interaction H3 + H,H2 low energy cloud chemistry Ceccarelli+ 2011 W51C Fiasson+ 2009 [HESS] x100 normal CR ionisation weird cloud chemistry? OH maser trace also CR? Frail 2011 16
Cherenkov Telescope Array angular resolution improved factor 3 sensitivity improved by factor 10 P. Martin, J. Knödlseder, M. Renaud, G. Dubus etc 17