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Article: Intense radio outburst from the supermassive star η Carinae

TitleIntense radio outburst from the supermassive star η Carinae
Authors
KeywordsCircumstellar Matter
H Ii Regions
Radio Lines: Stars
Stars: Activity
Stars: Individual (Η Carinae)
Supergiants
Issue Date1995
PublisherInstitute of Physics Publishing Ltd. The Journal's web site is located at http://iopscience.iop.org/2041-8205
Citation
Astrophysical Journal, 1995, v. 441 n. 2 PART 2, p. L73-L76 How to Cite?
AbstractOn five occasions between 1992 June 29 and 1994 May 3, we have used the Australia Telescope Compact Array to image η Carinae at a wavelength of 3 cm and a resolution of 1″. These observations have revealed remarkable activity. Since 1992 June, the total flux density has increase from 0.8 to 2.2 Jy, and the original single compact source has grown to a complex of sources spread over an area of about 16 arcsec 2 (Fig. 1). Strong hydrogen recombination-line spectral emission has appeared at the site of the strongest of these new sources. This recombination emission has the largest spectral width ever observed from a star, ± 250 km s'1, and reveals gas with turbulent velocities as great as 250 km s -1 approaching us at an average velocity of about 200 km s -1. We believe that this radio outburst has been caused by a more than threefold increase of ultraviolet luminosity, and consequent ionization of previously neutral gas clouds.
Persistent Identifierhttp://hdl.handle.net/10722/175189
ISSN
2015 Impact Factor: 5.487
2015 SCImago Journal Rankings: 3.369

 

DC FieldValueLanguage
dc.contributor.authorDuncan, RAen_US
dc.contributor.authorWhite, SMen_US
dc.contributor.authorLim, Jen_US
dc.contributor.authorNelson, GJen_US
dc.contributor.authorDrake, SAen_US
dc.contributor.authorKundu, MRen_US
dc.date.accessioned2012-11-26T08:50:46Z-
dc.date.available2012-11-26T08:50:46Z-
dc.date.issued1995en_US
dc.identifier.citationAstrophysical Journal, 1995, v. 441 n. 2 PART 2, p. L73-L76en_US
dc.identifier.issn2041-8205en_US
dc.identifier.urihttp://hdl.handle.net/10722/175189-
dc.description.abstractOn five occasions between 1992 June 29 and 1994 May 3, we have used the Australia Telescope Compact Array to image η Carinae at a wavelength of 3 cm and a resolution of 1″. These observations have revealed remarkable activity. Since 1992 June, the total flux density has increase from 0.8 to 2.2 Jy, and the original single compact source has grown to a complex of sources spread over an area of about 16 arcsec 2 (Fig. 1). Strong hydrogen recombination-line spectral emission has appeared at the site of the strongest of these new sources. This recombination emission has the largest spectral width ever observed from a star, ± 250 km s'1, and reveals gas with turbulent velocities as great as 250 km s -1 approaching us at an average velocity of about 200 km s -1. We believe that this radio outburst has been caused by a more than threefold increase of ultraviolet luminosity, and consequent ionization of previously neutral gas clouds.en_US
dc.languageengen_US
dc.publisherInstitute of Physics Publishing Ltd. The Journal's web site is located at http://iopscience.iop.org/2041-8205en_US
dc.relation.ispartofAstrophysical Journal Lettersen_US
dc.subjectCircumstellar Matteren_US
dc.subjectH Ii Regionsen_US
dc.subjectRadio Lines: Starsen_US
dc.subjectStars: Activityen_US
dc.subjectStars: Individual (Η Carinae)en_US
dc.subjectSupergiantsen_US
dc.titleIntense radio outburst from the supermassive star η Carinaeen_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-s2.0-79960846024en_US
dc.identifier.volume441en_US
dc.identifier.issue2 PART 2en_US
dc.identifier.spageL73en_US
dc.identifier.epageL76en_US
dc.publisher.placeUnited Kingdomen_US
dc.identifier.scopusauthoridDuncan, RA=7401604768en_US
dc.identifier.scopusauthoridWhite, SM=7404079906en_US
dc.identifier.scopusauthoridLim, J=7403453870en_US
dc.identifier.scopusauthoridNelson, GJ=16459833800en_US
dc.identifier.scopusauthoridDrake, SA=7102438520en_US
dc.identifier.scopusauthoridKundu, MR=7102095820en_US

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