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Simulated Radio Images and Light Curves of SN 1993J

Published online by Cambridge University Press:  19 September 2016

Vikram V. Dwarkadas ,
Amy J. Mioduszewski  and
Lewis T. Ball
Vikram V. Dwarkadas
Affiliation:
ASCI FLASH Center, Univ of Chicago, 5640 S. Ellis Ave, Chicago IL 60637 [email protected]
Amy J. Mioduszewski
Affiliation:
NRAO, P.O. Box O, Socorro, NM 87801, USA; [email protected]
Lewis T. Ball
Affiliation:
CSIRO ATNF Parkes Observatory, P.O. Box 276, Parkes NSW 2870, [email protected]

Summary

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We present calculations of the radio images and light curves from supernovae, based on high-resolution numerical simulations of the hydrodynamics and radiation transfer in a spherically symmetric medium. As a specific example we model the emission from SN1993J. This supernova does not appear to be expanding in a self-similar fashion, and cannot be adequately fitted with the often-used analytic mini-shell model. We present a good fit to the radio evolution at a single frequency. Both free-free absorption and synchrotron self-absorption are needed to fit the light curve at early times, and a circumstellar density profile of ρ ~ r−1.7 provides the best fit to the later data. Comparisons of VLBI images of SN1993J with synthetic model images suggest that internal free-free absorption completely obscures emission at 8.4 GHz passing through the center of the supernova for the first few tens of years after explosion.

Type
Part I Supernovae: Individual
Information
International Astronomical Union Colloquium , Volume 192: Cosmic Explosions , 2005 , pp. 47 - 52
Copyright
Copyright © Springer-Verlag 2005

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