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arXiv 2301.08010astro-ph.HEastro-ph.GA
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根据SRG/eRosita X射线源目录中的Gaia数据探测活动星系核和具有显著自行的类星体

Detection of AGNs and quasars having significant proper motions according to Gaia data within SRG/eRosita X-Ray sources catalog

I. M. Khamitov, I. F. Bikmaev, M. R. Gilfanov, R. A. Sunyaev, P. S. Medvedev, M. A. Gorbachev, E. N. Irtuganov

摘要:

根据对SRG/eROSITA的X射线活动星星表和盖亚星表的比较,获得了502个奇特天体的样本,一方面,盖亚探测到了具有统计意义的视差或自行值,另一方面,在光学波段记录了非零源范围的迹象。在log($F_X/F_{\rm opt}$)-(G-RP)色图中,这些天体被从X射线活跃恒星中分离出来,并且位于具有活跃核的星系的典型区域。根据SIMBAD数据库,其中约有$\sim 50$ %的天体是经光谱测量红移的活动星系核和星系,只有$\sim$ 1.4%的天体是经证实的银河系天体。用RTT-150望远镜对19个不明天体进行了光谱观测,结果表明,其中18个是活动星系核,红移为$\sim$ 0.01-0.3,还有一个是银河系的M星。我们讨论各种方案解释这种奇特的对象的性质。

英文摘要:

Based on a comparison of the SRG/eROSITA catalog of X-ray active stars and the Gaia catalog, a sample of 502 peculiar objects was obtained for which Gaia, on one hand, detects statistically significant values of parallax or proper motion and, on the other hand, registers signs of the non zero source extent in the optical band. In the log ($F_X/F_{\rm opt}$) - (G-RP) color diagram these objects are separated from the balk of X-ray active stars and are located in the region typical for the galaxies with active nuclei. According to the SIMBAD database, about $\sim 50$% of them are confirmed AGNs and galaxies with spectroscopically measured redshifts, and only $\sim$1.4% are confirmed Galactic objects. Spectroscopic observations of 19 unidentified objects on the RTT-150 telescope demonstrated, that 18 of them are AGNs at redshifts $\sim$0.01-0.3, and one object is a M star in our Galaxy. We discuss various scenarios explaining the nature of such peculiar objects.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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