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Optical Classification of BZG Objects from the BZCAT Blazar Catalog

Optical Classification of BZG Objects from the BZCAT Blazar Catalog In the blazar catalog BZCAT the objects are divided into 4 types: BZB, BZQ, BZG, and BZU. In this paper BZG objects are studied in order to determine their physical nature. Of the 274 BZG objects, 150 have optical spectra in the SDSS spectroscopic catalog, for which a detailed spectral classification has been carried out. A radio study showed that these objects mostly (69%) have a flat radio spectrum with a spectral index less than ±0.5. Quasars predominate among these kinds of radio spectra. However, with increasing distance, on the average the radio spectrum becomes steeper. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Astrophysics Springer Journals

Optical Classification of BZG Objects from the BZCAT Blazar Catalog

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References (9)

Publisher
Springer Journals
Copyright
Copyright © Springer Science+Business Media, LLC, part of Springer Nature 2023. Springer Nature or its licensor (e.g. a society or other partner) holds exclusive rights to this article under a publishing agreement with the author(s) or other rightsholder(s); author self-archiving of the accepted manuscript version of this article is solely governed by the terms of such publishing agreement and applicable law.
ISSN
0571-7256
eISSN
1573-8191
DOI
10.1007/s10511-023-09767-1
Publisher site
See Article on Publisher Site

Abstract

In the blazar catalog BZCAT the objects are divided into 4 types: BZB, BZQ, BZG, and BZU. In this paper BZG objects are studied in order to determine their physical nature. Of the 274 BZG objects, 150 have optical spectra in the SDSS spectroscopic catalog, for which a detailed spectral classification has been carried out. A radio study showed that these objects mostly (69%) have a flat radio spectrum with a spectral index less than ±0.5. Quasars predominate among these kinds of radio spectra. However, with increasing distance, on the average the radio spectrum becomes steeper.

Journal

AstrophysicsSpringer Journals

Published: Mar 1, 2023

Keywords: blazar; quasar; optical spectral classification; radio spectral index

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