Σ–D relation for supernova remnants and its dependence on the density of the interstellar medium |
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Authors: | B. Arbutina, D. Uro evi |
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Affiliation: | Astronomical Observatory, Volgina 7, 11160 Belgrade, Serbia and Montenegro;Department of Astronomy, Faculty of Mathematics, University of Belgrade, Studenski trg 16, 11000 Belgrade, Serbia and Montenegro |
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Abstract: | During the last couple of decades of work on the Σ– D (radio surface brightness to diameter) relation for supernova remnants (SNRs), it has been generally accepted that no single Σ– D relation can be constructed for all SNRs. However, it may still be possible to construct the relations for some classes of SNRs. In our previous paper we analysed Σ– D relation(s) for remnants in the dense environments of molecular clouds. The aim of this paper is to examine, in the same context, a class of oxygen-rich SNRs, and to extend the analysis to remnants evolving in lower-density interstellar media, namely Balmer-dominated SNRs. We have obtained good relations with certain similarities to our previous findings – similarities that emphasize, again, the role of ambient density in the evolution of SNRs. |
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Keywords: | methods: statistical supernova remnants radio continuum: ISM |
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