NASA/IPAC EXTRAGALACTIC DATABASE
Date and Time of the Query: 2019-08-19 T18:46:45 PDT
Help | Comment | NED Home

For refcode 2014ApJ...797....2K:
Retrieve 18 NED objects in this reference.
Please click here for ADS abstract

NED Abstract

Copyright by American Astronomical Society. Reproduced by permission
2014ApJ...797....2K Radio Observations Reveal a Smooth Circumstellar Environment Around the Extraordinary Type Ib Supernova 2012au Kamble, Atish; Soderberg, Alicia M.; Chomiuk, Laura; Margutti, Raffaella; Medvedev, Mikhail; Milisavljevic, Dan; Chakraborti, Sayan; Chevalier, Roger; Chugai, Nikolai; Dittmann, Jason; Drout, Maria; Fransson, Claes; Nakar, Ehud; Sanders, Nathan Abstract. 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 (rhovpropr ^--2^). We infer a sub-relativistic velocity for the shock wave v ~ 0.2 c and a radius of r ~ 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 \dot{M} = 3.6 x 10^-6^ M_o_ yr^-1^, consistent with the estimates from X-ray observations. We estimate the total internal energy of the radio-emitting material to be E ~ 10^47^ erg, 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 ~ 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. Key words: radiation mechanisms: non-thermal, radio continuum: general, supernovae: general, supernovae: individual: SN 2012au
Retrieve 18 NED objects in this reference.
Please click here for ADS abstract

Back to NED Home