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Article: New optically identified supernova remnants in the Large Magellanic Cloud

TitleNew optically identified supernova remnants in the Large Magellanic Cloud
Authors
Keywordstechniques: spectroscopic
ISM: supernova remnants
Magellanic Clouds
Issue Date2021
PublisherRoyal Astronomical Society. The Journal's web site is located at http://www.oxfordjournals.org/our_journals/mnras/
Citation
Monthly Notices of the Royal Astronomical Society, 2021, v. 500 n. 2, p. 2336-2358 How to Cite?
AbstractWe present a new optical sample of three Supernova Remnants (SNRs) and 16 Supernova Remnant (SNR) candidates in the Large Magellanic Cloud (LMC). These objects were originally selected using deep H α, [S II], and [O III] narrow-band imaging. Most of the newly found objects are located in less dense regions, near or around the edges of the LMC’s main body. Together with previously suggested MCSNR J0541–6659, we confirm the SNR nature for two additional new objects: MCSNR J0522–6740 and MCSNR J0542–7104. Spectroscopic follow-up observations for 12 of the LMC objects confirm high [S II]/H α emission-line ratios ranging from 0.5 to 1.1. We consider the candidate J0509–6402 to be a special example of the remnant of a possible type Ia Supernova (SN) which is situated some 2° (∼1.75 kpc) north from the main body of the LMC. We also find that the SNR candidates in our sample are significantly larger in size than the currently known LMC SNRs by a factor of ∼2. This could potentially imply that we are discovering a previously unknown but predicted, older class of large LMC SNRs that are only visible optically. Finally, we suggest that most of these LMC SNRs are residing in a very rarefied environment towards the end of their evolutionary span where they become less visible to radio and X-ray telescopes.
Persistent Identifierhttp://hdl.handle.net/10722/296328
ISSN
2023 Impact Factor: 4.7
2023 SCImago Journal Rankings: 1.621
ISI Accession Number ID

 

DC FieldValueLanguage
dc.contributor.authorYew, M-
dc.contributor.authorFilipović, MD-
dc.contributor.authorStupar, M-
dc.contributor.authorPoints, SD-
dc.contributor.authorSasaki, M-
dc.contributor.authorMaggi, P-
dc.contributor.authorHaberl, F-
dc.contributor.authorKavanagh, PJ-
dc.contributor.authorParker, QA-
dc.contributor.authorCrawford, EJ-
dc.contributor.authorVukotić, B-
dc.contributor.authorUrošević, D-
dc.contributor.authorSano, H-
dc.contributor.authorSeitenzahl, IR-
dc.contributor.authorRowell, G-
dc.contributor.authorLeahy, D-
dc.contributor.authorBozzetto, LM-
dc.contributor.authorMaitra, C-
dc.contributor.authorLeverenz, H-
dc.contributor.authorPayne, JL-
dc.contributor.authorPark, LAF-
dc.contributor.authorAlsaberi, RZE-
dc.contributor.authorPannuti, TG-
dc.date.accessioned2021-02-22T04:53:45Z-
dc.date.available2021-02-22T04:53:45Z-
dc.date.issued2021-
dc.identifier.citationMonthly Notices of the Royal Astronomical Society, 2021, v. 500 n. 2, p. 2336-2358-
dc.identifier.issn0035-8711-
dc.identifier.urihttp://hdl.handle.net/10722/296328-
dc.description.abstractWe present a new optical sample of three Supernova Remnants (SNRs) and 16 Supernova Remnant (SNR) candidates in the Large Magellanic Cloud (LMC). These objects were originally selected using deep H α, [S II], and [O III] narrow-band imaging. Most of the newly found objects are located in less dense regions, near or around the edges of the LMC’s main body. Together with previously suggested MCSNR J0541–6659, we confirm the SNR nature for two additional new objects: MCSNR J0522–6740 and MCSNR J0542–7104. Spectroscopic follow-up observations for 12 of the LMC objects confirm high [S II]/H α emission-line ratios ranging from 0.5 to 1.1. We consider the candidate J0509–6402 to be a special example of the remnant of a possible type Ia Supernova (SN) which is situated some 2° (∼1.75 kpc) north from the main body of the LMC. We also find that the SNR candidates in our sample are significantly larger in size than the currently known LMC SNRs by a factor of ∼2. This could potentially imply that we are discovering a previously unknown but predicted, older class of large LMC SNRs that are only visible optically. Finally, we suggest that most of these LMC SNRs are residing in a very rarefied environment towards the end of their evolutionary span where they become less visible to radio and X-ray telescopes.-
dc.languageeng-
dc.publisherRoyal Astronomical Society. The Journal's web site is located at http://www.oxfordjournals.org/our_journals/mnras/-
dc.relation.ispartofMonthly Notices of the Royal Astronomical Society-
dc.subjecttechniques: spectroscopic-
dc.subjectISM: supernova remnants-
dc.subjectMagellanic Clouds-
dc.titleNew optically identified supernova remnants in the Large Magellanic Cloud-
dc.typeArticle-
dc.identifier.emailParker, QA: quentinp@hku.hk-
dc.identifier.authorityParker, QA=rp02017-
dc.description.naturepublished_or_final_version-
dc.identifier.doi10.1093/mnras/staa3382-
dc.identifier.scopuseid_2-s2.0-85099961347-
dc.identifier.hkuros321285-
dc.identifier.volume500-
dc.identifier.issue2-
dc.identifier.spage2336-
dc.identifier.epage2358-
dc.identifier.isiWOS:000605983000062-
dc.publisher.placeUnited Kingdom-

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