2010A&A...518A..35C


Query : 2010A&A...518A..35C

2010A&A...518A..35C - Astronomy and Astrophysics, volume 518, A35-35 (2010/7-2)

Multi-frequency study of local group supernova remnants. The curious case of the Large Magellanic Cloud SNR J0528-6714.

CRAWFORD E.J., FILIPOVIC M.D., HABERL F., PIETSCH W., PAYNE J.L. and DE HORTA A.Y.

Abstract (from CDS):

The SNRs known in the Local Group show a variety of morphological structures that are relatively uncorrelated in the different wavelength bands. This variety is probably caused by the different conditions in the surrounding medium with which the remnant interacts. Recent ATCA, XMM-Newton and MCELS observations of the Magellanic Clouds (MCs) cover a number of new and known SNRs which are poorly studied, such as SNR J0528-6714. This particular SNR exhibits luminous radio-continuum emission, but is one of the unusual and rare cases without detectable optical and very faint X-ray emission (initially detected by ROSAT and listed as object [HP99]498). We used new multi-frequency radio-continuum surveys and new optical observations at Hα, [SII] and [OIII] wavelengths, in combination with XMM-Newton X-ray data, to investigate the SNR properties and to search for a physical explanation for the unusual appearance of this SNR. We analysed the X-ray and Radio-Continuum spectra and present multi-wavelength morphological studies of this SNR. We present the results of new moderate resolution ATCA observations of SNR J0528-6714. We found that this object is a typical older SNR with a radio spectral index of α=-0.36±0.09 and a diameter of D=52.4±1.0pc. Regions of moderate and somewhat irregular polarisation were detected which are also indicative of an older SNR. Using a non-equilibrium ionisation collisional plasma model to describe the X-ray spectrum, we find temperatures kT of 0.26keV for the remnant. The low temperature, low surface brightness, and large extent of the remnant all indicate a relatively advanced age. The near circular morphology indicates a type Ia event. Our study revealed one of the most unusual cases of SNRs in the Local Group of galaxies - a luminous radio SNR without optical counterpart and, at the same time, very faint X-ray emission. While it is not unusual to not detect an SNR in the optical, the combination of faint X-ray and no optical detection makes this SNR very unique.

Abstract Copyright:

Journal keyword(s): Magellanic Clouds - ISM: supernova remnants - ISM: individual objects: SNR J0528-6714

Simbad objects: 11

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Number of rows : 11
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2023
#notes
1 NAME SMC G 00 52 38.0 -72 48 01   2.79 2.2     ~ 10530 1
2 M 33 GiG 01 33 50.8965749232 +30 39 36.630403128 6.17 6.27 5.72     ~ 5603 1
3 NAME Magellanic Clouds GrG 03 00 -71.0           ~ 6555 1
4 NAME LMC G 05 23 34.6 -69 45 22     0.4     ~ 16509 1
5 SNR B0528-67.2 SNR 05 28 24.10 -67 10 11.0           ~ 11 0
6 KMHK 943 Cl* 05 28 34.860 -67 13 35.08     12.01     ~ 14 0
7 LHA 120-N 54 PN 05 29 23.1391259352 -67 13 22.433328804 18.119 19.130 18.094 16.19 20.418 ~ 22 0
8 RX J0529.4-6713 X 05 29 25.8 -67 13 24           ~ 3 0
9 ICRF J052930.0-724528 QSO 05 29 30.04217573 -72 45 28.5075004   19.61   17.895   ~ 88 1
10 ICRF J193925.0-634245 Sy2 19 39 25.0245304992 -63 42 45.640373400   18.87 18.37 17.64   ~ 1137 1
11 NAME Local Group GrG ~ ~           ~ 7893 0

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2023.01.30-22:52:27

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