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  • Kamble, Atish (author)

RADIO OBSERVATIONS REVEAL A SMOOTH CIRCUMSTELLAR ENVIRONMENT AROUND THE EXTRAORDINARY TYPE Ib SUPERNOVA 2012au

  • Article/chapterEnglish2014

Publisher, publication year, extent ...

  • 2014
  • printrdacarrier

Numbers

  • LIBRIS-ID:oai:DiVA.org:su-111395
  • https://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-111395URI
  • https://doi.org/10.1088/0004-637X/797/1/2DOI

Supplementary language notes

  • Language:English
  • Summary in:English

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  • Subject category:ref swepub-contenttype
  • Subject category:art swepub-publicationtype

Notes

  • AuthorCount:14;
  • We present extensive radio and X-ray observations of SN 2012au, an energetic, radio-luminous supernova of Type Ib that exhibits multi-wavelength properties bridging subsets of hydrogen-poor superluminous supernovae, hypernovae, and normal core-collapse supernovae. The observations closely follow models of synchrotron emission from a shock-heated circumburst medium that has a wind density profile (rho alpha r(-2)). We infer a sub-relativistic velocity for the shock wave v approximate to 0.2 c and a radius of r approximate to 1.4 x 10(16) cm at 25 days after the estimated date of explosion. For a wind velocity of 1000 km s(-1), we determine the mass-loss rate of the progenitor to be M = 3.6 x 10(-6) M-circle dot yr(-1), consistent with the estimates from X-ray observations. We estimate the total internal energy of the radio-emitting material to be E approximate to 10(47) crg, which is intermediate to SN 1998bw and SN 2002ap. The evolution of the radio light curve of SN 2012au is in agreement with its interaction with a smoothly distributed circumburst medium and the absence of stellar shells ejected from previous outbursts out to r approximate to 10(17) cm from the supernova site. We conclude that the bright radio emission from SN 2012au was not dissimilar from other core-collapse supernovae despite its extraordinary optical properties, and that the evolution of the SN 2012au progenitor star was relatively quiet, marked with a steady mass loss, during the final years preceding explosion.

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Added entries (persons, corporate bodies, meetings, titles ...)

  • Soderberg, Alicia M. (author)
  • Chomiuk, Laura (author)
  • Margutti, Raffaella (author)
  • Medvedev, Mikhail (author)
  • Milisavljevic, Dan (author)
  • Chakraborti, Sayan (author)
  • Chevalier, Roger (author)
  • Chugai, Nikolai (author)
  • Dittmann, Jason (author)
  • Drout, Maria (author)
  • Fransson, ClaesStockholms universitet,Institutionen för astronomi(Swepub:su)frans (author)
  • Nakar, Ehud (author)
  • Sanders, Nathan (author)
  • Stockholms universitetInstitutionen för astronomi (creator_code:org_t)

Related titles

  • In:Astrophysical Journal797:1, s. 2-0004-637X1538-4357

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