期刊
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
卷 515, 期 3, 页码 4099-4129出版社
OXFORD UNIV PRESS
DOI: 10.1093/mnras/stac813
关键词
ISM: supernova remnants; (galaxies:) Magellanic Clouds; X-rays: ISM
资金
- ESA Member States
- NASA
This paper presents deep X-ray coverage of ten supernova remnants (SNRs) in the Large Magellanic Cloud (LMC) and confirms seven of them as bona-fide SNRs. The study provides insights into the position, size, and physical properties of the confirmed SNRs, and enhances our understanding of the fainter X-ray SNR population in the LMC.
The Large Magellanic Cloud (LMC) hosts a rich population of supernova remnants (SNRs), our knowledge of which is the most complete of any galaxy. However, there remain many candidate SNRs, identified through optical and radio observations where additional X-ray data can confirm their SNR nature and provide details on their physical properties. In this paper, we present XMM-Newton observations that provide the first deep X-ray coverage of ten objects, comprising eight candidates and two previously confirmed SNRs. We perform multifrequency studies using additional data from the Magellanic Cloud Emission Line Survey (MCELS) to investigate their broad-band emission and used Spitzer data to understand the environment in which the objects are evolving. We confirm seven of the eight candidates as bona-fide SNRs. We used a multifrequency morphological study to determine the position and size of the remnants. We identify two new members of the class of evolved Fe-rich remnants in the Magellanic Clouds (MCs), several SNRs well into their Sedov-phase, one SNR likely projected towards a H ii region, and a faint, evolved SNR with a hard X-ray core which could indicate a pulsar wind nebula. Overall, the seven newly confirmed SNRs represent a similar to 10-per cent increase in the number of LMC remnants, bringing the total number to 71, and provide further insight into the fainter population of X-ray SNRs.
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