Statistical studies of supernova remnants

Details Statistical studies of supernova remnants Statistical studies of supernova remnants

Jul 1984

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984mnras.209..449g&link_type=abstract

Monthly Notices of the Royal Astronomical Society (ISSN 0035-8711), vol. 209, July 15, 1984, p. 449-478. Research supported by t

Astronomy and Astrophysics

Astronomy

274

Astronomical Catalogs, Astronomical Coordinates, Star Distribution, Statistical Analysis, Supernova Remnants, Brightness Distribution, Distance, Galactic Structure, Hydrogen Clouds, Kinematics, Magellanic Clouds, Radial Velocity, Stellar Motions

Scientific paper

The distance estimates available for Galactic supernova remnants (SNRs) are reviewed. The remnants with reliable distances have a much wider spread of intrinsic properties than has been evident before, which implies that the radio surface brightness-linear diameter (Sigma-D) relation is of little use for determining distances to Galactic SNRs, and that the cumulative number-diameter (N-D) relation cannot be applied with any confidence to present studies of Galactic SNRs. The reported free expansion of Galactic remnants out to large diameters (greater than 30 pc) is thus due to the surface brightness limits of SNR catalogues rather than to undecelerated expansion of the remnants. Similarly, the apparent free expansion of remnants in the Magellanic Clouds is due to the application of the N-D relation to an incomplete sample. Existing catalogues of SNRs are not even complete to a limiting surface brightness, as bright but distant young SNRs are missing. A detailed catalogue of 145 Galactic SNRs is presented.

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