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Ryle Telescope observations of SN 1993J

from Part three - Supernovae

Published online by Cambridge University Press:  07 September 2010

By
D. A. Green  and
G. G. Pooley
Edited by
R. E. S. Clegg ,
I. R. Stevens  and
W. P. S. Meikle
D. A. Green
Affiliation:
Mullard Radio Astronomy Observatory, Cavendish Laboratory, Madingley Road, Cambridge CB3 OHE, U.K.
G. G. Pooley
Affiliation:
Mullard Radio Astronomy Obsergatory, Cavendish Laboratory, Madingley Road, Cambridge CB3 OHE, U.K.
R. E. S. Clegg
Affiliation:
Royal Greenwich Observatory, Cambridge
I. R. Stevens
Affiliation:
Imperial College of Science, Technology and Medicine, London
W. P. S. Meikle
Affiliation:
University of Birmingham
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Summary

Abstract

We present observations of SN 1993J made with the Ryle Telescope, Cambridge, UK, at 15.25 GHz. These show a sharp switch-on of the radio emission about eight days after the supernova explosion, with the emission then brightening at an approximately constant rate for the next month. The emission peaked about 75 days after the explosion, and then showed a gradual decline, with variations on the timescale of weeks. The long, steady rise in emission and the sharp switch-on do not fit with expected radio emission from ‘mini-shell’ models of radio supernovae.

Introduction

The detection of SN 1993J in NGC3031 (≡M81) by F. Garcia on March 28.86 was reported in an IAU Circular by Ripero (1993) on March 30. This was the nearest supernova (SN) detected in the northern hemisphere since SN 1937C, and it has been, and will be, studied at many wavelengths in more detail than any other SN except SN 1987A in the LMC. SN 1993J showed hydrogen lines in its early spectra, and was initially thought to be a type II SN, but subsequently its spectra developed to resemble those of type Ib SN. Thus it has been classed as a peculiar type IIb SN (Filippenko & Matheson 1993), and it is thought to be the result of the explosion of a massive star which has almost lost its outer hydrogen-rich envelope.

Type
Chapter
Information
Circumstellar Media in Late Stages of Stellar Evolution , pp. 203 - 206
Publisher: Cambridge University Press
Print publication year: 1994

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  • Ryle Telescope observations of SN 1993J
    • By D. A. Green, Mullard Radio Astronomy Observatory, Cavendish Laboratory, Madingley Road, Cambridge CB3 OHE, U.K., G. G. Pooley, Mullard Radio Astronomy Obsergatory, Cavendish Laboratory, Madingley Road, Cambridge CB3 OHE, U.K.
  • Edited by R. E. S. Clegg, Royal Greenwich Observatory, Cambridge, I. R. Stevens, Imperial College of Science, Technology and Medicine, London, W. P. S. Meikle, University of Birmingham
  • Book: Circumstellar Media in Late Stages of Stellar Evolution
  • Online publication: 07 September 2010
  • Chapter DOI: https://doi.org/10.1017/CBO9780511564628.026
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  • Ryle Telescope observations of SN 1993J
    • By D. A. Green, Mullard Radio Astronomy Observatory, Cavendish Laboratory, Madingley Road, Cambridge CB3 OHE, U.K., G. G. Pooley, Mullard Radio Astronomy Obsergatory, Cavendish Laboratory, Madingley Road, Cambridge CB3 OHE, U.K.
  • Edited by R. E. S. Clegg, Royal Greenwich Observatory, Cambridge, I. R. Stevens, Imperial College of Science, Technology and Medicine, London, W. P. S. Meikle, University of Birmingham
  • Book: Circumstellar Media in Late Stages of Stellar Evolution
  • Online publication: 07 September 2010
  • Chapter DOI: https://doi.org/10.1017/CBO9780511564628.026
Available formats
×

Save book to Google Drive

To save content items to your account, please confirm that you agree to abide by our usage policies. If this is the first time you use this feature, you will be asked to authorise Cambridge Core to connect with your account. Find out more about saving content to Google Drive.

  • Ryle Telescope observations of SN 1993J
    • By D. A. Green, Mullard Radio Astronomy Observatory, Cavendish Laboratory, Madingley Road, Cambridge CB3 OHE, U.K., G. G. Pooley, Mullard Radio Astronomy Obsergatory, Cavendish Laboratory, Madingley Road, Cambridge CB3 OHE, U.K.
  • Edited by R. E. S. Clegg, Royal Greenwich Observatory, Cambridge, I. R. Stevens, Imperial College of Science, Technology and Medicine, London, W. P. S. Meikle, University of Birmingham
  • Book: Circumstellar Media in Late Stages of Stellar Evolution
  • Online publication: 07 September 2010
  • Chapter DOI: https://doi.org/10.1017/CBO9780511564628.026
Available formats
×