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On Interpretations of Observed Radio Properties of Cas A

Published online by Cambridge University Press:  25 April 2016

I. Lerche†  and
J. L. Caswell
I. Lerche†
Affiliation:
Division of Radiopnysics, CSIRO, Sydney
J. L. Caswell
Affiliation:
Division of Radiopnysics, CSIRO, Sydney
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Extract

Cas A has a radio surface brightness much higher (by a factor of about 100) than that of any other galactic supernova remnant (SNR) and is probably the youngest (≤ 300 yr). It therefore provides unique information on young remnants, but this very uniqueness makes it hazardous to treat Cas A as a typical remnant. However, because it (i) shows a clearly defined shell of radio emission of much the same type as older remnants, and (ii) lies approximately on the extrapolation of the Σ.-D (surface brightness-diameter) relationship derived for older remnants (Clark and Caswell 1976); Caswell and Lerche 1979a), detailed comparison with older remnants seems appropriate.

Type
Contributions
Information
Publications of the Astronomical Society of Australia , Volume 3 , Issue 5 , 1979 , pp. 347 - 348
Copyright
Copyright © Astronomical Society of Australia 1979

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