2008MNRAS.391.1384F

Query : 2008MNRAS.391.1384F

2008MNRAS.391.1384F - Mon. Not. R. Astron. Soc., 391, 1384-1402 (2008/December-2)

Deep MERLIN 5GHz radio imaging of supernova remnants in the M82 starburst.

FENECH D.M., MUXLOW T.W.B., BESWICK R.J., PEDLAR A. and ARGO M.K.

Abstract (from CDS):

The results of an extremely deep, 8-d long observation of the central kpc of the nearby starburst galaxy M82 using Multi-Element Radio Linked Interferometer Network (MERLIN) at 5GHz are presented. The 17µJy/beam rms noise level in the naturally weighted image makes it the most sensitive high-resolution radio image of M82 made to date. Over 50 discrete sources are detected, the majority of which are supernova remnants, but with 13 identified as Hii regions. Sizes, flux densities and radio brightnesses are given for all of the detected sources, which are all well resolved with a majority showing shell or partial shell structures. Those sources within the sample which are supernova remnants have diameters ranging from 0.3 to 6.7pc, with a mean size of 2.9pc.

From a comparison with previous MERLIN 5-GHz observations made in 1992 July, which gives a 9.75-yr timeline, it has been possible to measure the expansion velocities of 10 of the more compact sources, eight of which have not been measured before. These derived expansion velocities range between 2200 and 10500km/s.


Abstract Copyright: © 2008 The Authors. Journal compilation © 2008 RAS

Journal keyword(s): Hii regions - supernova remnants - galaxies: individual: M82 - galaxies: ISM - galaxies: starburst

VizieR on-line data: <Available at CDS (J/MNRAS/391/1384): table2.dat>

Nomenclature: Table 2: [FMB2008] SS.ss+SS.s N=55.

CDS comments: Numbering 'NN' in Table 2, col(1) is not used in Simbad.

Simbad objects: 24

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Number of rows : 24
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 NAME LMC G 05 23 34.6 -69 45 22     0.4     ~ 19090 0
2 SN 1993J SN* 09 55 24.77476 +69 01 13.7026   10.8 12.0     SNIIb 1507 1
3 M 81 Sy2 09 55 33.1726556496 +69 03 55.062505368   7.89 6.94     ~ 4725 3
4 [FBM2010] 39.10+57.3 SNR 09 55 47.880 +69 40 43.72           ~ 24 0
5 [FMB2008] 39.77+56.9 SNR 09 55 48.55 +69 40 43.3           ~ 10 0
6 [FBM2010] 41.30+59.6 SNR 09 55 50.050 +69 40 45.92           ~ 24 0
7 CXOM82 J095550.9+694044 HXB 09 55 50.690 +69 40 43.76           ~ 96 0
8 [FBM2010] 42.80+61.2 SNR 09 55 51.550 +69 40 47.54           ~ 12 0
9 [FBM2010] 43.31+59.2 SNR 09 55 52.030 +69 40 45.42           ~ 32 0
10 [MPW94] 43.55+60.0 Rad 09 55 52.2 +69 40 46           ~ 3 0
11 M 82 AGN 09 55 52.430 +69 40 46.93 9.61 9.30 8.41     ~ 6156 6
12 NAME 44.0+59.5 SNR 09 55 52.730 +69 40 45.78           ~ 45 1
13 [FBM2010] 44.28+59.3 SNR 09 55 52.990 +69 40 45.49           ~ 18 0
14 [FBM2010] 44.51+58.2 SNR 09 55 53.230 +69 40 44.36           ~ 19 0
15 [FBM2010] 45.17+61.2 SNR 09 55 53.880 +69 40 47.43 20.412 20.009 19.315   18.763 ~ 28 0
16 [FBM2010] 45.24+65.2 SNR 09 55 53.960 +69 40 51.29           ~ 17 0
17 [FBM2010] 45.42+64.7 SNR 09 55 54.130 +69 40 53.58           ~ 19 0
18 [FBM2010] 45.89+63.9 SNR 09 55 54.5322387360 +69 40 49.332992124           ~ 16 0
19 [FBM2010] 46.52+63.9 SNR 09 55 55.220 +69 40 50.01           ~ 20 0
20 [FBM2010] 46.70+67.1 SNR 09 55 55.410 +69 40 53.17           ~ 20 0
21 3C 286 Sy1 13 31 08.2883506368 +30 30 32.960091564   17.51 17.25     ~ 4558 2
22 Mrk 668 BLL 14 07 00.39441712 +28 27 14.6901341   16.13 15.35 10.29   ~ 826 3
23 IC 1127 SyG 15 34 57.22396 +23 30 11.6084   14.76 13.88     ~ 3090 4
24 NAME Cas A SNR 23 23 26.0 +58 48 41     14.30     ~ 3033 1

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