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Imaging of SN 1993J

  • A. Alberdi
  • J.M. Marcaide
Conference paper
Part of the Springer Proceedings in Physics book series (SPPHY, volume 99)

Summary

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).

Keywords

Spectral Index Radio Emission Deceleration Parameter Brightness Distribution Reverse Shock 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer-Verlag Berlin Heidelberg 2005

Authors and Affiliations

  • A. Alberdi
    • 1
  • J.M. Marcaide
    • 2
  1. 1.IAA-CSICGranadaSpain
  2. 2.Departamento de AstronomíaUniversidad de ValenciaBurjassotSpain

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