2012ApJ...749L..35U

Query : 2012ApJ...749L..35U

2012ApJ...749L..35U - Astrophys. J., 749, L35 (2012/April-3)

Fermi large area telescope discovery of GeV gamma-ray emission from the vicinity of SNR W44.

UCHIYAMA Y., FUNK S., KATAGIRI H., KATSUTA J., LEMOINE-GOUMARD M., TAJIMA H., TANAKA T. and TORRES D.F.

Abstract (from CDS):

We report the detection of GeV γ-ray emission from the molecular cloud complex that surrounds the supernova remnant (SNR) W44 using the Large Area Telescope on board Fermi. While the previously reported γ-ray emission from SNR W44 is likely to arise from the dense radio-emitting filaments within the remnant, the γ-ray emission that appears to come from the surrounding molecular cloud complex can be ascribed to the cosmic rays (CRs) that have escaped from W44. The non-detection of synchrotron radio emission associated with the molecular cloud complex suggests the decay of π0 mesons produced in hadronic collisions as the γ-ray emission mechanism. The total kinetic energy channeled into the escaping CRs is estimated to be Wesc∼ (0.3-3)x1050 erg, in broad agreement with the conjecture that SNRs are the main sources of Galactic CRs.

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Journal keyword(s): acceleration of particles - cosmic rays - ISM: supernova remnants - radiation mechanisms: non-thermal

Simbad objects: 13

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Number of rows : 13
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 SNR G006.4-00.1 SNR 18 00 31.2011719 -23 25 48.001099           ~ 782 1
2 CO 034.20+00.10 MoC 18 53 23 +01 13.8           ~ 4 0
3 CO 035.00+00.30 MoC 18 53 53 +02 00.7           ~ 2 0
4 PSR B1853+01 Psr 18 56 10.65 +01 13 21.3           ~ 211 1
5 SNR G034.6-00.5 SNR 18 56 10.650 +01 13 21.30           ~ 1034 2
6 CO 035.50-00.10 MoC 18 56 34 +02 13.7           ~ 2 0
7 CO 034.60-00.70 MoC 18 57 12 +01 09.8           ~ 2 0
8 CO 034.80-00.60 MoC 18 57 12 +01 26.6           ~ 5 0
9 EGR J1856+0235 gam 18 57 37.16 +02 12 33.6           ~ 32 0
10 PSR B1855+02 Psr 18 57 43.65400 +02 12 41.0000           ~ 65 0
11 SNR G035.6-00.4 SNR 18 57 55 +02 13.0           ~ 56 1
12 CO 035.10-00.70 MoC 18 58 07 +01 36.6           ~ 2 0
13 HESS J1858+020 gam 18 58 20.0 +02 05 24           ~ 45 0

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