2012A&A...539A..15G


Query : 2012A&A...539A..15G

2012A&A...539A..15G - Astronomy and Astrophysics, volume 539A, 15-15 (2012/3-1)

XMMU J0541.8-6659, a new supernova remnant in the Large Magellanic Cloud.

GRONDIN M.-H., SASAKI M., HABERL F., PIETSCH W., CRAWFORD E.J., FILIPOVIC M.D., BOZZETTO L.M., POINTS S. and SMITH R.C.

Abstract (from CDS):

The high sensitivity of the XMM-Newton instrumentation offers the opportunity to study faint and extended sources in the Milky Way and nearby galaxies such as the Large Magellanic Cloud (LMC) in detail. The ROSAT PSPC survey of the LMC has revealed more than 700 X-ray sources, among which there are 46 supernova remnants (SNRs) and candidates. We have observed the field around one of the most promising SNR candidates in the ROSAT PSPC catalogue, labelled [HP99] 456 with XMM-Newton, to determine its nature. We investigated the XMM-Newton data along with new radio-continuum, near infrared and optical data. In particular, spectral and morphological studies of the X-ray and radio data were performed. The X-ray images obtained in different energy bands reveal two different structures. Below 1.0keV the X-ray emission shows the shell-like morphology of an SNR with a diameter of ∼73pc, one of the largest known in the LMC. For its thermal spectrum we estimate an electron temperature of (0.49±0.12)keV assuming non-equilibrium ionisation. The X-ray images above 1.0keV reveal a less extended source within the SNR emission, located 1' west of the centre of the SNR and coincident with bright point sources detected in radio-continuum. This hard component has an extent of 0.9' (i.e. ∼13pc at a distance of ∼50kpc) and a non-thermal spectrum. The hard source coincides in position with the ROSAT source [HP99] 456 and shows an indication for substructure. We firmly identify a new SNR in the LMC with a shell-like morphology and a thermal spectrum. Assuming the SNR to be in the Sedov phase yields an age of ∼23kyr. We explore possible associations of the hard non-thermal emitting component with a pulsar wind nebula (PWN) or background active galactic nucleus (AGN).

Abstract Copyright:

Journal keyword(s): Magellanic Clouds - ISM: supernova remnants

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 - 2021
#notes
1 NAME SMC G 00 52 38.0 -72 48 01   2.79 2.2     ~ 9858 1
2 SNR B0103-72.6 SNR 01 05 05.6 -72 23 20           ~ 75 1
3 M 33 GiG 01 33 50.904 +30 39 35.79 6.17 6.27 5.72     ~ 5319 1
4 NAME Magellanic Clouds GrG 03 00 -71.0           ~ 5995 1
5 SNR B0450-70.9 SNR 04 49 48.85 -70 51 08.8           ~ 33 0
6 SNR B0506-65.8 SNR 05 06 05.00 -65 41 30.0           ~ 9 0
7 PMN J0506-6542 Rad 05 06 05.0 -65 41 29           ~ 18 1
8 NAME LMC G 05 23 34.6 -69 45 22     0.4     ~ 15466 1
9 NAME SNR J0528-6714 SNR 05 28 25.80 -67 14 42.5           ~ 5 0
10 ICRF J052930.0-724528 QSO 05 29 30.04217690 -72 45 28.5072742   19.61   17.895   ~ 83 1
11 [HP99] 456 X 05 41 41.2 -66 58 26           ~ 9 0
12 M 83 SBG 13 37 00.919 -29 51 56.74 8.85 8.11 7.52 7.21   ~ 2310 2
13 ICRF J193925.0-634245 Sy2 19 39 25.02671 -63 42 45.6255   18.87 18.37 17.64   ~ 1029 1

    Equat.    Gal    SGal    Ecl

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2021.07.29-16:57:01

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