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dc.contributor.authorRyder, S.
dc.contributor.authorKotak, R.
dc.contributor.authorSmith, I.
dc.contributor.authorTingay, Steven
dc.contributor.authorKool, E.
dc.contributor.authorPolshaw, J.
dc.date.accessioned2017-01-30T15:07:15Z
dc.date.available2017-01-30T15:07:15Z
dc.date.created2016-12-18T19:31:12Z
dc.date.issued2016
dc.identifier.citationRyder, S. and Kotak, R. and Smith, I. and Tingay, S. and Kool, E. and Polshaw, J. 2016. SN 1978K: An evolved supernova outside our Local Group detected at millimetre wavelengths [Letter to the Editor]. Astronomy and Astrophysics. 595 (L9): pp. 1-4.
dc.identifier.urihttp://hdl.handle.net/20.500.11937/43397
dc.identifier.doi10.1051/0004-6361/201629763
dc.description.abstract

Supernova 1978K is one of the oldest-known examples of the class of Type IIn supernovae that show evidence for strong interaction between the blast wave and a dense, pre-existing circumstellar medium. Here we report detections of SN 1978K at both 34 GHz and 94 GHz, making it only the third extragalactic supernova (after SN 1987A and SN 1996cr) to be detected at late-times at these frequencies. We find SN 1978K to be >400 times more luminous than SN 1987A at millimetre wavelengths in spite of the roughly nine year difference in ages, highlighting the risk in adopting SN 1987A as a template for the evolution of core-collapse supernovae in general. Additionally, from new VLBI observations at 8.4 GHz, we measure a deconvolved diameter for SN 1978K of ~5 milli-arcsec, and a corresponding average expansion velocity of <1500 km s-1. These observations provide independent evidence of an extremely dense circumstellar medium surrounding the progenitor star.

dc.publisherEDP Sciences
dc.titleSN 1978K: An evolved supernova outside our Local Group detected at millimetre wavelengths
dc.typeJournal Article
dcterms.source.volume595
dcterms.source.issn0004-6361
dcterms.source.titleAstronomy and Astrophysics
curtin.note

Reproduced with permission from Astronomy & Astrophysics, © ESO

curtin.departmentCurtin Institute of Radio Astronomy (Physics)
curtin.accessStatusOpen access


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