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Article: The remnant of supernova 1987A resolved at 3-mm wavelength

TitleThe remnant of supernova 1987A resolved at 3-mm wavelength
Authors
KeywordsIsm: Supernova Remnants
Magellanic Clouds
Radio Continuum: Ism
Supernovae: Individual: Sn 1987A
Issue Date2012
PublisherEDP Sciences. The Journal's web site is located at http://www.aanda.org
Citation
Astronomy And Astrophysics, 2012, v. 541, article no. L2 How to Cite?
AbstractContext. The proximity of core-collapse supernova 1987A (SN 1987A) in the Large Magellanic Cloud (LMC) and its rapid evolution make it a unique case study of the development of a young supernova remnant. Aims. We aim at resolving the remnant of SN 1987A for the first time in the 3-mm band (at 94 GHz). Methods. We observed the source at 3-mm wavelength with a 750-m configuration of the Australia Telescope Compact Array (ATCA). We compared the image with a recent 3-cm image and with archival X-ray images. Results. We present a diffraction-limited image with a resolution of 0.′′7, revealing the ring structure seen at lower frequencies and at other wavebands. The emission peaks in the eastern part of the ring. The 3-mm image bears resemblance to early X-ray images (from 1999-2000). We place an upper limit of 1 mJy (2σ) on any discrete source of emission in the centre (inside of the ring). The integrated flux density at 3 mm has doubled over the six years since the previous observations at 3 mm. Conclusions. At 3 mm-i.e. within the operational domain of the Atacama Large Millimeter/submillimeter Array (ALMA)-SN 1987A appears to be dominated by synchrotron radiation from the inner rim of the equatorial ring, characterised by moderately weak shocks. There is no clear sign of emission of a different nature, but the current limits do not rule out such component altogether. © 2012 ESO.
Persistent Identifierhttp://hdl.handle.net/10722/180504
ISSN
2014 Impact Factor: 4.378
2015 SCImago Journal Rankings: 2.446
ISI Accession Number ID
References

 

DC FieldValueLanguage
dc.contributor.authorLakićević, Men_US
dc.contributor.authorZanardo, Gen_US
dc.contributor.authorVan Loon, JThen_US
dc.contributor.authorStaveleySmith, Len_US
dc.contributor.authorPotter, Ten_US
dc.contributor.authorNg, CYen_US
dc.contributor.authorGaensler, BMen_US
dc.date.accessioned2013-01-28T01:38:55Z-
dc.date.available2013-01-28T01:38:55Z-
dc.date.issued2012en_US
dc.identifier.citationAstronomy And Astrophysics, 2012, v. 541, article no. L2en_US
dc.identifier.issn0004-6361en_US
dc.identifier.urihttp://hdl.handle.net/10722/180504-
dc.description.abstractContext. The proximity of core-collapse supernova 1987A (SN 1987A) in the Large Magellanic Cloud (LMC) and its rapid evolution make it a unique case study of the development of a young supernova remnant. Aims. We aim at resolving the remnant of SN 1987A for the first time in the 3-mm band (at 94 GHz). Methods. We observed the source at 3-mm wavelength with a 750-m configuration of the Australia Telescope Compact Array (ATCA). We compared the image with a recent 3-cm image and with archival X-ray images. Results. We present a diffraction-limited image with a resolution of 0.′′7, revealing the ring structure seen at lower frequencies and at other wavebands. The emission peaks in the eastern part of the ring. The 3-mm image bears resemblance to early X-ray images (from 1999-2000). We place an upper limit of 1 mJy (2σ) on any discrete source of emission in the centre (inside of the ring). The integrated flux density at 3 mm has doubled over the six years since the previous observations at 3 mm. Conclusions. At 3 mm-i.e. within the operational domain of the Atacama Large Millimeter/submillimeter Array (ALMA)-SN 1987A appears to be dominated by synchrotron radiation from the inner rim of the equatorial ring, characterised by moderately weak shocks. There is no clear sign of emission of a different nature, but the current limits do not rule out such component altogether. © 2012 ESO.en_US
dc.languageengen_US
dc.publisherEDP Sciences. The Journal's web site is located at http://www.aanda.orgen_US
dc.relation.ispartofAstronomy and Astrophysicsen_US
dc.subjectIsm: Supernova Remnantsen_US
dc.subjectMagellanic Cloudsen_US
dc.subjectRadio Continuum: Ismen_US
dc.subjectSupernovae: Individual: Sn 1987Aen_US
dc.titleThe remnant of supernova 1987A resolved at 3-mm wavelengthen_US
dc.typeArticleen_US
dc.identifier.emailNg, CY: stephen_ng@hku.hken_US
dc.identifier.authorityNg, CY=rp01706en_US
dc.description.naturelink_to_OA_fulltexten_US
dc.identifier.doi10.1051/0004-6361/201218902en_US
dc.identifier.scopuseid_2-s2.0-84860117687en_US
dc.identifier.hkuros217335-
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-84860117687&selection=ref&src=s&origin=recordpageen_US
dc.identifier.volume541en_US
dc.identifier.spagearticle no. L2-
dc.identifier.epagearticle no. L2-
dc.identifier.isiWOS:000304390900170-
dc.publisher.placeFranceen_US
dc.identifier.scopusauthoridLakićević, M=42261915500en_US
dc.identifier.scopusauthoridZanardo, G=6602108757en_US
dc.identifier.scopusauthoridVan Loon, JTh=7103050723en_US
dc.identifier.scopusauthoridStaveleySmith, L=7004532371en_US
dc.identifier.scopusauthoridPotter, T=35503804700en_US
dc.identifier.scopusauthoridNg, CY=24830903500en_US
dc.identifier.scopusauthoridGaensler, BM=34769921200en_US

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