BZCAT Blazar星表中BZG天体的光学分类

Pub Date : 2023-04-12 DOI:10.1007/s10511-023-09767-1

H. V. Abrahamyan, A. M. Mickaelian, G. M. Paronyan, G. A. Mikayelyan, A. G. Sukiasyan

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引用次数: 2

摘要

在耀变体星表BZCAT中，天体被分为4类:BZB、BZQ、BZG和BZU。本文对BZG对象进行了研究，以确定其物理性质。在274个BZG天体中，有150个在SDSS光谱目录中有光谱，并对其进行了详细的光谱分类。一项无线电研究表明，这些天体大多(69%)具有平坦的无线电频谱，光谱指数小于±0.5。类星体在这类射电光谱中占主导地位。然而，随着距离的增加，无线电频谱平均变得陡峭。

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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.

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