A new approach to the possibilities of Σ(D)-dependence and distances of the supernova remnants

A new way of chossing the calibrators for constructing Sigma(D)-dependence of supernova remnants (SNR) is suggested. A knowledge of the distance of an SNR is not sufficient to consider it as a calibrator. It is shown that neither more accurate determination of distance to calibrators, nor an increas...

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Bibliographic Details
Published in:Astrophysics and space science 1986-04, Vol.121 (1), p.21-44
Main Authors: ALLAKHVERDIYEV, A. O, GUSEINOV, O. H, KASUMOV, F. K, YUSIFOV, I. M
Format: Article
Language:English
Subjects:
Astronomy
Earth, ocean, space
Exact sciences and technology
Interstellar medium (ism) and nebulae in milky way
Stellar systems. Galactic and extragalactic objects and systems. The universe
Supernova remnants
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Summary:A new way of chossing the calibrators for constructing Sigma(D)-dependence of supernova remnants (SNR) is suggested. A knowledge of the distance of an SNR is not sufficient to consider it as a calibrator. It is shown that neither more accurate determination of distance to calibrators, nor an increase in their number, nor an increase in the precision of the remnant angular size and radio flux determination, can lead to a considerable improvement of simple Sigma(D)-dependence which is suggested in the given work. For remnants with small surface brightnesses there is no Sigma(D)- dependence at all. The most accurate remnant distances currently known, are given, and it is suggested that these will change only after a large amount of additional observational data accurately compiled. (Author)
ISSN:0004-640X
1572-946X
DOI:10.1007/BF00648261