Investigation of Blazars in UV and in radio

Mkrtchyan, V. K.; Abrahamyan, H. V.; Mickaelian, A. M.

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Title: Investigation of Blazars in UV and in radio

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2579-2276

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100-105

Abstract:

Blazars are the most energetic sources in the Universe, but have not been thoroughly and homogeneously investigated in all spectral ranges, particularly in UV. We carried out cross-correlations of BZCAT v.5 Catalogue with UV (GALEX) and radio catalogues, in order to find a connection between the fluxes in UV with optical and radio ranges. BZCAT v.5 catalogue includes 3561 objects. For these objects, we found 1841 associations from the GALEX catalogue (providing Far UV – FUV and Near UV – NUV), from which 999 associations from FIRST (providing fluxes at 1400 MHz) and 855 associations from SDSS (providing photometry at ugriz bands and medium dispersion spectroscopy for limited number of objects). Our main task is to understand which type of blazars (BZB, BZG, BZQ, and BZU) are more powerful sources in the UV range. We calculated UV/radio and UV/opt flux ratios and analyzed them to understand possible connections between radio, optical, and UV ranges. Having our new optical classification of blazars by activity types, we also analyzed the UV/radio/optical properties of the sample across their activity types.

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pdf

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oai:arar.sci.am:425920

General note:

Communications of the Byurakan Astrophysical Observatory (ComBAO) is a peer-reviewed scientific journal, which publishes research in observational and theoretical astronomy/astrophysics and presents recent advances in these fields. It is being published by the NAS RA V. Ambartsumian Byurakan Astrophysical Observatory (BAO) in English in electronic form. The journal publishes original papers, review papers, brief reports, book reviews, special communications, observational and theoretical results in various fields of astronomy and related sciences, and some editorial notes, including anniversaries and obituaries. Under the heading “Legacy”, the renewed magazine will republish some old articles of high value in English. The heading “Guest articles” will bring to the attention of readers the articles of researchers who are not employees of BAO. ComBAO was founded in 1946 and regularly published in 1946-1990. However, the publication was interrupted because of the economic situation after the disintegration of the Soviet Union in 1991.

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Subject and keywords:

Astrophysics Blazars Quasars Active Galactic Nuclei Catalogues

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Jan 8, 2026

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Jan 8, 2026

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https://arar.sci.am/publication/458731

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Edition name	Date
Mkrtchyan, V. K., Investigation of Blazars in UV and in radio	Jan 8, 2026

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Title: Investigation of Blazars in UV and in radio

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