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On the SN 1993J Radio Shell Structure

Published online by Cambridge University Press:  19 September 2016

J.M. Marcaide ,
I. Martí-Vidal ,
E. Ros ,
A. Alberdi ,
J.C. Guirado ,
L. Lara ,
M.A. Pérez-Torres  and
K.W. Weiler
J.M. Marcaide
Affiliation:
Departamento de Astronomía, Universitat de València, 46100 Burjassot, Spain; [email protected]
I. Martí-Vidal
Affiliation:
Departamento de Astronomía, Universitat de València, 46100 Burjassot, Spain; [email protected]
E. Ros
Affiliation:
Max-Planck-Institut für Radioastronomie, 53121 Bonn, Germany
A. Alberdi
Affiliation:
IAA-CSIC, Apdo. Correos 3004, 18080 Granada, Spain
J.C. Guirado
Affiliation:
Departamento de Astronomía, Universitat de València, 46100 Burjassot, Spain; [email protected]
L. Lara
Affiliation:
IAA-CSIC, Apdo. Correos 3004, 18080 Granada, Spain Universidad de Granada, 18071 Granada, Spain
M.A. Pérez-Torres
Affiliation:
IAA-CSIC, Apdo. Correos 3004, 18080 Granada, Spain
K.W. Weiler
Affiliation:
Naval Research Laboratory, Code 7213, Washington DC 20375-5320, USA

Summary

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An accurate measurement of the expansion deceleration of SN 1993J depends on how well the shell size and its emission structure are known. With the goal of determining the emission structure of the shell, we have developed a new approach, which we call “Green Function Deconvolution” (GFD), based on iterative use of Green functions on the sky plane to reconstruct the radial emission profiles of spherically symmetric sources. This approach works reasonably well in the case of optically thin emitting sources, which is not the case for SN 1993J since, as we find, the emission from the central part of SN 1993J further away from us is strongly or totally absorbed. We describe the GFD method and present our findings about the emission structure of the shell. We also present the expansion of SN 1993J based on a method complementary to GFD, which will be described elsewhere.

Type
Part I Supernovae: Individual
Information
International Astronomical Union Colloquium , Volume 192: Cosmic Explosions , 2005 , pp. 29 - 36
Copyright
Copyright © Springer-Verlag 2005

References

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