2011ApJ...741...44K

Query : 2011ApJ...741...44K

2011ApJ...741...44K - Astrophys. J., 741, 44 (2011/November-1)

Fermi large area telescope observations of the Cygnus Loop supernova remnant.

KATAGIRI H., TIBALDO L., BALLET J., GIORDANO F., GRENIER I.A., PORTER T.A., ROTH M., TIBOLLA O., UCHIYAMA Y. and YAMAZAKI R.

Abstract (from CDS):

We present an analysis of the gamma-ray measurements by the Large Area Telescope onboard the Fermi Gamma-ray Space Telescope in the region of the supernova remnant (SNR) Cygnus Loop (G74.0-8.5). We detect significant gamma-ray emission associated with the SNR in the energy band 0.2-100 GeV. The gamma-ray spectrum shows a break in the range 2-3 GeV. The gamma-ray luminosity is ∼1x1033 erg/s between 1 and 100 GeV, much lower than those of other GeV-emitting SNRs. The morphology is best represented by a ring shape, with inner/outer radii 0°.7±0°.1 and 1°.6±0°.1. Given the association among X-ray rims, Hα filaments, and gamma-ray emission, we argue that gamma rays originate in interactions between particles accelerated in the SNR and interstellar gas or radiation fields adjacent to the shock regions. The decay of neutral pions produced in nucleon-nucleon interactions between accelerated hadrons and interstellar gas provides a reasonable explanation for the gamma-ray spectrum.

Abstract Copyright: ∼

Journal keyword(s): acceleration of particles - cosmic rays - gamma rays: ISM - ISM: individual: Cygnus Loop - ISM: supernova remnants

Simbad objects: 11

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Number of rows : 11
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 Fermi bn100116897 gB 20 20 +14.4           ~ 42 0
2 NAME Cyg Complex reg 20 32 +45.0           ~ 667 0
3 PSR J2043+2740 Psr 20 43 43.5 +27 40 56           ~ 137 0
4 1FGL J2049.1+3142 gam 20 49 10 +31 42.9           ~ 4 0
5 NAME Cyg Loop SNR 20 51.0 +30 40           ~ 964 0
6 1FGL J2055.2+3144 gam 20 55 12 +31 44.3           ~ 5 0
7 PSR J2055+25 Psr 20 55 48.948 +25 39 58.93           ~ 58 0
8 1FGL J2057.4+3057 gam 20 57 30 +30 57.9           ~ 5 0
9 QSO J2115+295 Bla 21 15 29.41345155 +29 33 38.3669390     19.5 19.26   ~ 201 1
10 RX J2116.1+3339 BLL 21 16 14.5182410521 +33 39 20.425133154           ~ 64 1
11 Fermi bn081024891 gB 21 31 36.00 +21 12 14.4           ~ 91 0

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