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Deceleration in the Expansion of SN 1993J

Published online by Cambridge University Press:  12 April 2016

J. M. Marcaide ,
A. Alberdi ,
E. Ros ,
P. Diamond ,
I. I. Shapiro ,
J. C. Guirado ,
D.L. Jones ,
F. Mantovani ,
M. A. Pérez-Torres  and
R. A. Preston
...Show all authors
J. M. Marcaide
Affiliation:
Departamento de Astronomía, Universitat de València, E-46100 Burjassot, Spain
A. Alberdi
Affiliation:
LAEFF-INTA, 28080 Madrid, Spain IAA-CSIC, 18080 Granada, Spain
E. Ros
Affiliation:
Departamento de Astronomía, Universitat de València, E-46100 Burjassot, Spain
P. Diamond
Affiliation:
NRAO, Socorro, NM 87801, USA
I. I. Shapiro
Affiliation:
Harvard-Smithsonian CfA, Cambridge, MA 02138, USA
J. C. Guirado
Affiliation:
Departamento de Astronomía, Universitat de València, E-46100 Burjassot, Spain
D.L. Jones
Affiliation:
JPL, Pasadena, CA 91109, USA
F. Mantovani
Affiliation:
IRA-CNR, Bologna 40129, Italy
M. A. Pérez-Torres
Affiliation:
Departamento de Astronomía, Universitat de València, E-46100 Burjassot, Spain
R. A. Preston
Affiliation:
JPL, Pasadena, CA 91109, USA
R. T. Schilizzi
Affiliation:
JIVE, 7990 AA Dwingeloo, Netherlands Leiden Observatory, 2300 RA Leiden, Netherlands
R. A. Sramek
Affiliation:
NRAO, Socorro, NM 87801, USA
C. Trigilio
Affiliation:
IRA-CNR, Noto, Italy
S.D. Van Dyk
Affiliation:
UCLA, Los Angeles, CA 90095
K. W. Weiler
Affiliation:
NRL, Washington, DC 20375-5320
A. R. Whitney
Affiliation:
MIT-Haystack Observatory, Westford, MA 01886, USA

Abstract

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With new 6 cm observations we confirm the self-similar expansion of SN 1993J previously discovered at 3.6 cm and estimate the expansion deceleration parameter. The results are inconsistent with the existence of a constant pre-explosion stellar wind but otherwise confirm the standard radio supernova model. The first map at 13 cm showing shell structure is also presented.

Type
Research Article
Information
International Astronomical Union Colloquium , Volume 164: Radio Emission from Galactic and Extragalactic Compact Sources , 1998 , pp. 353 - 354
Copyright
Copyright © Astronomical Society of the Pacific 1998

References

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