1999MNRAS.308L..23S

Query : 1999MNRAS.308L..23S

1999MNRAS.308L..23S - Mon. Not. R. Astron. Soc., 308, L23-L27 (1999/September-3)

X-ray-luminous radio supernovae in the centre of M 82 ?

STEVENS I.R., STRICKLAND D.K. and WILLS K.A.

Abstract (from CDS):

We investigate the X-ray emission from the central regions of the prototypical starburst galaxy M82. Previous observations have shown a bright central X-ray point source, with suggestions as to its nature including a low-luminosity active galactic nucleus or an X-ray binary. A new analysis of ROSAT HRI observations finds four X-ray point sources in the central kiloparsec of M82, and we identify radio counterparts for the two brightest X-ray sources. The counterparts are probably young radio supernovae (SNe) and are amongst the most luminous and youthful SNe in M82. We therefore suggest that we are seeing X-ray emission from young SNe in M82, and in particular that the brightest X-ray source is associated with the radio source 41.95+57.5. We discuss the implications of these observations for the evolution of X-ray-luminous SNe.

Abstract Copyright: 1999 Blackwell Science Ltd

Journal keyword(s): supernova remnants - galaxies: individual: M82 - galaxies: starburst - galaxies: stellar content - X-rays: galaxies

Nomenclature: Table 2: [SSW99] XN (Nos X1-X4).

CDS comments: Table 2: radio counterpart = [MPW94]

Simbad objects: 16

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Number of rows : 16
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 SK 160 HXB 01 17 05.1457288392 -73 26 36.014808156 12.23 13.00 13.15   13.17 O9.7Ia+ 918 0
2 SN 1986J SN* 02 22 31.33 +42 19 56.4   18.4 18.4     SNII 331 1
3 SN 1978K SN* 03 17 38.620 -66 33 03.40   13.0       SNII 214 1
4 IC 443 SNR 06 17 00.0000000 +22 34 11.998901           ~ 1314 1
5 SN 1993J SN* 09 55 24.77476 +69 01 13.7026   10.8 12.0     SNIIb 1507 1
6 [SSW99] X1 X 09 55 46.4 +69 40 20           ~ 1 0
7 CXOM82 J095550.9+694044 HXB 09 55 50.690 +69 40 43.76           ~ 96 0
8 [FBM2010] 43.31+59.2 SNR 09 55 52.030 +69 40 45.42           ~ 32 0
9 M 82 AGN 09 55 52.430 +69 40 46.93 9.61 9.30 8.41     ~ 6156 6
10 NAME 44.0+59.5 SNR 09 55 52.730 +69 40 45.78           ~ 45 1
11 [SSW99] X4 X 09 56 01.7 +69 41 11           ~ 1 0
12 SN 1988Z SN* 10 51 50.10 +16 00 00.5   16.8       SNIIn 385 1
13 SN 1979C SN* 12 22 58.58 +15 47 52.7   11.6       SNIIL 609 1
14 NGC 4449 EmG 12 28 11.118 +44 05 36.81 10.11 9.98 9.64 9.45   ~ 1192 1
15 NAME Lupus SN SNR 15 02 22.1 -42 05 49           ~ 1407 1
16 SN 1980K SN* 20 35 30.07 +60 06 23.7   11.6       SNIIL 482 1

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