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Article: Evolution of the radio outburst from the supermassive star η Carinae from 1992 to 1996

TitleEvolution of the radio outburst from the supermassive star η Carinae from 1992 to 1996
Authors
KeywordsH Ii Regions
Radio Continuum: Stars
Radio Lines: Stars
Stars: Activity
Stars: Individual: Η Carinae
Supergiants
Issue Date1997
PublisherBlackwell Publishing Ltd. The Journal's web site is located at http://www.blackwellpublishing.com/journals/MNR
Citation
Monthly Notices Of The Royal Astronomical Society, 1997, v. 290 n. 4, p. 680-688 How to Cite?
AbstractAn earlier paper, describing observations at a wavelength of 3 cm with the Australia Telescope Compact Array between 1992 June and 1994 May, showed the supermassive star η Carinae to be in the throes of a major outburst. This paper, based on observations at wavelengths of both 3 and 6 cm, describes the evolution of the outburst since 1994 May. From 1994 May to 1995 December, η Carinae's image continued to expand, and its total flux density to increase. These dramatic changes were caused, we believe, by an outburst of UV luminosity, and consequent ionization of pre-existing circumstellar gas clouds. Since 1995 December, η Carinae's total flux density has fallen. The large-scale structure of the radio image closely resembles Hα optical images of the η Carinae 'Homunculus' nebula. In addition, the central area shows fine-scale structure, principally comprising a secondary source about 1.2 arcsec to the northwest of the star, which we believe to be a dense gas cloud, and a ridge of length 4 arcsec centred on the optical position of the star, which we believe to be an equatorial disc or torus. These structures are seen also in 3-cm (H91α) recombination-line emission. © 1997 RAS.
Persistent Identifierhttp://hdl.handle.net/10722/174607
ISSN
2015 Impact Factor: 4.952
2015 SCImago Journal Rankings: 2.806
References

 

DC FieldValueLanguage
dc.contributor.authorDuncan, RAen_US
dc.contributor.authorWhite, SMen_US
dc.contributor.authorLim, Jen_US
dc.date.accessioned2012-11-26T08:46:28Z-
dc.date.available2012-11-26T08:46:28Z-
dc.date.issued1997en_US
dc.identifier.citationMonthly Notices Of The Royal Astronomical Society, 1997, v. 290 n. 4, p. 680-688en_US
dc.identifier.issn0035-8711en_US
dc.identifier.urihttp://hdl.handle.net/10722/174607-
dc.description.abstractAn earlier paper, describing observations at a wavelength of 3 cm with the Australia Telescope Compact Array between 1992 June and 1994 May, showed the supermassive star η Carinae to be in the throes of a major outburst. This paper, based on observations at wavelengths of both 3 and 6 cm, describes the evolution of the outburst since 1994 May. From 1994 May to 1995 December, η Carinae's image continued to expand, and its total flux density to increase. These dramatic changes were caused, we believe, by an outburst of UV luminosity, and consequent ionization of pre-existing circumstellar gas clouds. Since 1995 December, η Carinae's total flux density has fallen. The large-scale structure of the radio image closely resembles Hα optical images of the η Carinae 'Homunculus' nebula. In addition, the central area shows fine-scale structure, principally comprising a secondary source about 1.2 arcsec to the northwest of the star, which we believe to be a dense gas cloud, and a ridge of length 4 arcsec centred on the optical position of the star, which we believe to be an equatorial disc or torus. These structures are seen also in 3-cm (H91α) recombination-line emission. © 1997 RAS.en_US
dc.languageengen_US
dc.publisherBlackwell Publishing Ltd. The Journal's web site is located at http://www.blackwellpublishing.com/journals/MNRen_US
dc.relation.ispartofMonthly Notices of the Royal Astronomical Societyen_US
dc.subjectH Ii Regionsen_US
dc.subjectRadio Continuum: Starsen_US
dc.subjectRadio Lines: Starsen_US
dc.subjectStars: Activityen_US
dc.subjectStars: Individual: Η Carinaeen_US
dc.subjectSupergiantsen_US
dc.titleEvolution of the radio outburst from the supermassive star η Carinae from 1992 to 1996en_US
dc.typeArticleen_US
dc.identifier.emailLim, J: jjlim@hku.hken_US
dc.identifier.authorityLim, J=rp00745en_US
dc.description.naturelink_to_subscribed_fulltexten_US
dc.identifier.scopuseid_2-s2.0-0000292836en_US
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-0000292836&selection=ref&src=s&origin=recordpageen_US
dc.identifier.volume290en_US
dc.identifier.issue4en_US
dc.identifier.spage680en_US
dc.identifier.epage688en_US
dc.publisher.placeUnited Kingdomen_US
dc.identifier.scopusauthoridDuncan, RA=7401604768en_US
dc.identifier.scopusauthoridWhite, SM=7404079906en_US
dc.identifier.scopusauthoridLim, J=7403453870en_US

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