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The strange case of SN 2011ja and its host

Published online by Cambridge University Press:  29 January 2014

Sayan Chakraborti ,
Alak Ray ,
Randall Smith ,
Stuart Ryder ,
Naveen Yadav ,
Firoza Sutaria ,
Vikram V. Dwarkadas ,
Poonam Chandra ,
David Pooley  and
Rupak Roy
Sayan Chakraborti
Affiliation:
Harvard Smithsonian Center for Astrophysics, 60 Garden Street, Cambridge MA 02138, USA email: [email protected]
Alak Ray
Affiliation:
Tata Institute of Fundamental Research, Homi Bhabha Road, Colaba, Mumbai 400005, India
Randall Smith
Affiliation:
Harvard Smithsonian Center for Astrophysics, 60 Garden Street, Cambridge MA 02138, USA email: [email protected]
Stuart Ryder
Affiliation:
Australian Astronomical Observatory, P.O. Box 915, North Ryde, NSW 1670, Australia
Naveen Yadav
Affiliation:
Tata Institute of Fundamental Research, Homi Bhabha Road, Colaba, Mumbai 400005, India
Firoza Sutaria
Affiliation:
Indian Institute of Astrophysics, Koramangala, Bangalore, India
Vikram V. Dwarkadas
Affiliation:
Department of A&A, University of Chicago, 5640 S Ellis Avenue, Chicago, IL 60637, USA
Poonam Chandra
Affiliation:
Department of Physics, Royal Military College of Canada, Kingston, ON, K7K 7B4, Canada
David Pooley
Affiliation:
Department of Physics, Sam Houston State University, Huntsville, TX, USA
Rupak Roy
Affiliation:
Aryabhatta Research Institute of Observational Sciences, Manora peak, Nainital, India
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Abstract

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SN 2001ja was observed twice in three months using the Chandra X-Ray Observatory. The X-ray flux could be due to interaction with the circumstellar medium, perhaps dominated by the reverse shock heated thermal plasma, or from inverse Compton scattering at the forward shock. In both cases, for a steady wind-like circumstellar density profile, the X-ray flux is expected to fall off as a power law or faster. But the flux from the position of SN 2011ja, increased by a factor of three between these observations. In this presentation, we investigated possible reasons, including contamination from other astrophysical sources such as a X-Ray Binary, within the Chandra's resolution, in the host galaxy using our observations, modelling and pre-explosion Chandra/XMM data.

Keywords

Stars: Mass Loss — Supernovae: Individual: SN 2011ja — shock waves — circumstellar matter — radio continuum: general — X-rays: general
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 9 , Symposium S296: Supernova Environmental Impacts , January 2013 , pp. 342 - 343
Copyright
Copyright © International Astronomical Union 2014 

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