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Constraints on environs around SN 2011fe and SN 2014J from radio modeling and observations

Published online by Cambridge University Press:  17 October 2017

Esha Kundu Open the ORCID record for Esha Kundu [Opens in a new window] ,
Peter Lundqvist  and
Miguel A. Pérez-Torres
Esha Kundu
Affiliation:
Department of Astronomy and The Oskar Klein Centre, AlbaNova, Stockholm University, SE-10691 Stockholm, Sweden email: [email protected], [email protected]
Peter Lundqvist
Affiliation:
Department of Astronomy and The Oskar Klein Centre, AlbaNova, Stockholm University, SE-10691 Stockholm, Sweden email: [email protected], [email protected]
Miguel A. Pérez-Torres
Affiliation:
Instituto de Astrofísica de Andalucía, Glorieta de las Astronomía, s/n, E-18008 Granada, Spain Visiting Scientist: Departamento de Física Teorica, Facultad de Ciencias, Universidad de Zaragoza, Spain email: [email protected]
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Abstract

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The radio non-detection of two Type Ia supernovae (SNe) SN 2011fe and SN 2014J has been modeled considering synchrotron radiation from shock accelerated electrons in the SN shock fronts. With 10% each of the bulk kinetic energy in electric and magnetic fields, a very low density of the medium around both the SNe has been estimated from the null detection of radio emission, around 1 and 4 years after the explosion of SNe 2014J and 2011fe, respectively. Keeping the fraction of energy in electrons fixed at 10%, a medium with particle density ~ 1cm−3 is found when 1% of the post shock energy is in magnetic fields. In case of a wind medium, the former predicts the mass loss rate Ṁ to be <10−9M⊙ yr−1, and the latter gives an upper limit ~10−9M⊙ yr−1, for wind velocity of 100 kms−1, for both the SNe. The tenuous media obtained from this study favor the double degenerate as well as a spin up/down model for both SNe 2011fe and 2014J.

Keywords

stars: circumstellar mattersupernovae: generalsupernovae: individual (SN 2011fe, SN 2014J)
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 12 , Symposium S331: Supernova 1987A:30 years later - Cosmic Rays and Nuclei from Supernovae and their aftermaths , February 2017 , pp. 69 - 74
Copyright
Copyright © International Astronomical Union 2017 

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