|Title:||Updated radio Σ-D relation for galactic supernova remnants-ii||Journal:||Serbian Astronomical Journal||Issue:||199||First page:||23||Last page:||37||Issue Date:||1-Jan-2019||Rank:||M23||ISSN:||1450-698X||DOI:||10.2298/SAJ1999023V||Abstract:||
In this paper we present the updated empirical radio surface-brightness-to-diameter Σ-D relation for Galactic supernova remnants (SNRs) calibrated using 110 SNRs with reliable distances. We apply orthogonal fitting procedure and kernel density smoothing in the Σ-D plane and compare the re-sults with the latest theoretical Σ-D relations derived from simulations of radio evolution of SNRs. We argue that the best agreement between the empirical and simulated Σ-D relations is achieved if the mixed-morphology SNRs and SNRs of both, low brightness and small diameter, are ltered out from the calibration sample. The distances to 5 newly discovered remnants and 27 new candidates for shell SNRs are estimated from our full and ltered calibration samples.
|Keywords:||Astronomical data bases: miscellaneous | ISM: supernova remnants | Methods: data analysis | Methods: statistical | Radio continuum: ISM||Publisher:||Astronomical Observatory||Project:||Emission nebula: structure and evolution|
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