2012A&A...546A..21R


C.D.S. - SIMBAD4 rel 1.7 - 2020.10.23CEST02:35:14

2012A&A...546A..21R - Astronomy and Astrophysics, volume 546A, 21-21 (2012/10-1)

An extended source of GeV gamma rays coincident with the supernova remnant HB 21.

REICHARDT I., DE ONA-WILHELMI E., RICO J. and YANG R.

Abstract (from CDS):

We analyze 3.5 years of public Fermi/LAT data around the position of the supernova remnant HB21, where four point-like sources from the 2nd Fermi/LAT catalog are located. We determine that the gamma-ray source is produced by a single extended source. We model the observed morphology as a uniform circle. The spectral energy distribution is best described by a curved power law, with a maximum at 413±11MeV. We divide the circle into three regions defined by previously identified shocked molecular clouds, and find that one of these regions has a softer spectrum. The >3GeV gamma-ray emission of the soft spectrum region is bow-shaped and coincident with the supernova remnant shell seen at radio wavelengths. We suggest that the gamma-ray emission from HB21 can be understood as a combination of emission from shocked/illuminated molecular clouds, one of them coincident with the supernova remnant shell itself.

Abstract Copyright:

Journal keyword(s): acceleration of particles - ISM: supernova remnants - ISM: clouds - gamma rays: general - gamma rays: ISM - rays cosmic

Simbad objects: 17

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Number of rows : 17

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2020
#notes
1 SNR G180.0-01.7 SNR 05 39 00.000 +27 50 00.00           ~ 216 2
2 IC 443 SNR 06 18 02.7 +22 39 36           ~ 1110 1
3 3C 391.0 Rad 18 49 23.3 -00 55 38           ~ 320 2
4 SNR G034.6-00.5 SNR 18 56 10.650 +01 13 21.30           ~ 831 2
5 W 49b SNR 19 11 09.000 +09 06 24.00           ~ 398 1
6 SNR G049.1-00.1 SNR 19 23 19.300 +14 09 21.00           ~ 243 0
7 3C 418.0 QSO 20 38 37.0346600 +51 19 12.661988   21.30 20.00 18.9   ~ 273 0
8 2FGL J2041.5+5003 gam 20 41 30 +50 04.0           ~ 7 0
9 2FGL J2043.3+5105 gam 20 43 21 +51 05.9           ~ 7 0
10 SNR G089.0+04.7 SNR 20 45.0 +50 35           ~ 197 0
11 NAME Cyg Loop SNR 20 51.0 +30 40           ~ 827 0
12 [TFL90] C MoC 20 51 +50.0           ~ 6 0
13 [TFL90] B MoC 20 51 +50.4           ~ 6 0
14 2FGL J2051.8+5054 gam 20 51 49 +50 54.4           ~ 9 0
15 [TFL90] A MoC 20 52 +51.0           ~ 6 0
16 Ass Cyg OB 7 As* 21 08 +47.6           ~ 194 0
17 NAME Cas A SNR 23 23 24.000 +58 48 54.00           ~ 2439 1

    Equat.    Gal    SGal    Ecl

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2020.10.23-02:35:14

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