New radio continuum study of the large magellanic cloud supernova remnant N49

Simple item page
dc.contributor.authorGhavam, M.
dc.contributor.authorFilipović, M.D.
dc.contributor.authorAlsaberi, R.
dc.contributor.authorBarnes, L.
dc.contributor.authorCrawford, E.J.
dc.contributor.authorHaberl, F.
dc.contributor.authorKavanagh, P.
dc.contributor.authorMaggi, P.
dc.contributor.authorPayne, J.
dc.contributor.authorRowell, G.
dc.contributor.authorHidetoshi, S.
dc.contributor.authorSasaki, M.
dc.contributor.authorRajabpour, N.
dc.contributor.authorTothill, N.
dc.contributor.authorUrošević, D.
dc.date.issued2024
dc.description.abstractWe present new Australia Telescope Compact Array (ATCA) radio observations towards N 49, one of the brightest extragalactic supernova remnants (SNRs) located in the Large Magellanic Cloud (LMC). Our new and archival ATCA radio observations were analysed along with Chandra X-ray data. These observations show a prominent ‘bullet’ shaped feature beyond the southwestern boundary of the SNR. Both X-ray morphology and radio polarisation analysis support a physical connection of this feature to the SNR. The ‘bullet’ feature’s apparent velocity is estimated at ∼1 300 km s−1, based on its distance (∼10 pc) from the remnant’s geometric centre and estimated age (∼7 600 yr). we estimated the radio spectral index, α = −0.55 ± 0.03 which is typical of middle-age SNRs. Polarisation maps created for N 49 show low to moderate levels of mean fractional polarisation estimated at 7±1% and 10±1% for 5.5 and 9 GHz, respectively. These values are noticeably larger than found in previous studies. Moreover, the mean value for the Faraday rotation of SNR N 49 from combining CABB data is 212±65 rad m−2 and the maximum value of RM is 591±103 rad m−2.
dc.description.statementofresponsibilityMaddie Ghavam, Miroslav D. Filipovi, c, Rami Alsaberi, Luke Barnes, Evan J. Crawford, Frank Haberl, Patrick Kavanagh, Pierre Maggi, Jeffrey Payne, Gavin Rowell, Sano Hidetoshi, Manami Sasaki, Neda Rajabpour, Nicholas Tothill, and Dejan Urošević
dc.identifier.citationPublications of the Astronomical Society of Australia, 2024; 41:e089-e089
dc.identifier.doi10.1017/pasa.2024.73
dc.identifier.issn1323-3580
dc.identifier.issn1323-3580
dc.identifier.orcidRowell, G. [0000-0002-9516-1581]
dc.identifier.urihttps://hdl.handle.net/2440/144147
dc.language.isoen
dc.publisherCambridge University Press
dc.relation.granthttp://purl.org/au-research/grants/arc/DP200100784
dc.rights© The Author(s), 2024. Published by Cambridge University Press on behalf of Astronomical Society of Australia. This is an Open Access article, distributed under the terms of the Creative Commons Attribution licence (https://creativecommons.org/licenses/by/4.0/), which permits unrestricted re-use, distribution and reproduction, provided the original article is properly cited.
dc.source.urihttps://doi.org/10.1017/pasa.2024.73
dc.subjectISM: supernova remnants; (galaxies:) Magellanic Clouds; radio continuum: ISM; ATCA
dc.titleNew radio continuum study of the large magellanic cloud supernova remnant N49
dc.typeJournal article
pubs.publication-statusPublished

Files

Original bundle
Now showing 1 - 1 of 1
No Thumbnail Available
Name:
hdl_144147.pdf
Size:
3.15 MB
Format:
Adobe Portable Document Format
Description:
Published version
Download

Collections

Research Outputs