Search: onr:"swepub:oai:DiVA.org:su-111395" >
RADIO OBSERVATIONS ...
RADIO OBSERVATIONS REVEAL A SMOOTH CIRCUMSTELLAR ENVIRONMENT AROUND THE EXTRAORDINARY TYPE Ib SUPERNOVA 2012au
- Article/chapterEnglish2014
Publisher, publication year, extent ...
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
Part of subdatabase
Classification
-
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.
Subject headings and genre
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
Internet link
Find in a library
To the university's database
- By the author/editor
-
Kamble, Atish
-
Soderberg, Alici ...
-
Chomiuk, Laura
-
Margutti, Raffae ...
-
Medvedev, Mikhai ...
-
Milisavljevic, D ...
-
show more...
-
Chakraborti, Say ...
-
Chevalier, Roger
-
Chugai, Nikolai
-
Dittmann, Jason
-
Drout, Maria
-
Fransson, Claes
-
Nakar, Ehud
-
Sanders, Nathan
-
show less...
- About the subject
-
- NATURAL SCIENCES
-
NATURAL SCIENCES
-
and Physical Science ...
-
and Astronomy Astrop ...
- Articles in the publication
-
Astrophysical Jo ...
- By the university
-
Stockholm University