Hostname: page-component-586b7cd67f-l7hp2 Total loading time: 0 Render date: 2024-11-27T04:56:55.006Z Has data issue: false hasContentIssue false
  • English
  • Français

Supernova Remnants

Published online by Cambridge University Press:  30 March 2016

S. Van den Bergh
S. Van den Bergh*
Affiliation:
David Dunlap Observatory, Richmond Hill, Ontario, Canada

Abstract

Core share and HTML view are not available for this content. However, as you have access to this content, a full PDF is available via the ‘Save PDF’ action button.

The present structure and recent changes in Cas A are discussed. On the deepest available exposures the optical remnant of this supernova is seen to consist of an almost complete shell. The southern part of this shell is outlined by knots that have developed during the last decade. It is pointed out that moving nebulosity in which [O III] radiation is particularly strong is distributed differently from nebulosity in which the [O III]/[S II] ratio is more nearly normal. Observation of the motions of individual knots suggests a model in which dense blobs of matter, which have a highly anomalies composition, become luminous as they plough through a stationary interstellar (or circumstellar) medium.

Type
Joint Discussions
Information
Highlights of Astronomy , Volume 3: Highlights of Astronomy. As presented at the XVth General Assembly of the IAU, 1973 , 1974 , pp. 559 - 563
Copyright
Copyright © Reidel 1974

References

Baade, W. and Minkowski, R.: 1954, Astrophys. J. 119, 206.Google Scholar
Peimbert, M.: 1971, Astrophys. J. 170, 261.CrossRefGoogle Scholar
Peimbert, M. and van den Bergh, S.: 1971, Astrophys. J. 170, 261.CrossRefGoogle Scholar
Searle, L.: 1971, Astrophys. J. 168, 41.Google Scholar
Van den Bergh, S.: 1971a, Astrophys. J. 165, 259.Google Scholar
Van den Bergh, S.: 1971b, Astrophys. J. 165, 457.CrossRefGoogle Scholar
Van den Bergh, S.: 1973, Publ. Astron. Soc. Pacific 85, 335.CrossRefGoogle Scholar
Van den Bergh, S. and Dodd, W. W.: 1970, Astrophys. J. 162, 485.CrossRefGoogle Scholar
Van den Bergh, S., Marscher, A. P., and Terzian, Y.: 1973, Astrophys. J. Suppl. 26, 19 (No. 227).CrossRefGoogle Scholar