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Imaging of SN 1993J

Published online by Cambridge University Press:  19 September 2016

A. Alberdi  and
J.M. Marcaide
A. Alberdi
Affiliation:
IAA-CSIC, Apdo. Correos 3004, 18080 Granada, Spainantxon@iaa.es
J.M. Marcaide
Affiliation:
Departamento de Astronomía, Universidad de Valencia, 46100 Burjassot, Spain

Summary

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SN 1993J has been imaged with VLBI, and its angular expansion monitored, for almost ten years. The images show shell-like radio structures with almost circular symmetry. SN 1993J expands according to models of shock excited emission. The angular expansion has a changing deceleration rate and is best modeled with two different slopes. The swept-up mass estimate at an age of 3159 days (∼0.4 M⊙), comparable to the low-mass envelope, favors a binary scenario. The observed spectral index of SN 1993J has slowly flattened since age 1000 days onward (α has changed from −1 to −0.67 at an age of 2820 days).

Type
Part I Supernovae: Individual
Information
International Astronomical Union Colloquium , Volume 192: Cosmic Explosions , 2005 , pp. 13 - 21
Copyright
Copyright © Springer-Verlag 2005

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