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Finding binary active galactic nuclei by the centroid shift in imaging surveys
Liu Y(刘元); Liu, Yuan
2015
发表期刊ASTRONOMY & ASTROPHYSICS
卷号580页码:A133
通讯作者刘元
摘要The census of binary active galactic nuclei (AGNs) is important in order to understand the merging history of galaxies and the triggering of AGNs. However, there is still no efficient method for selecting the candidates of binary AGNs. The non-synchronous variations of the two AGNs in one binary system will induce the shift of the image centroid. Since the astrometric error is normally much smaller than the angular resolution of telescopes, it is possible to detect such shifts even in the unresolved system via multi-epoch observations. We perform some simulations and find that hundreds of observations are required to discover compact binary AGNs. This method is suitable for the future large-scale surveys, e.g., the Large Synoptic Survey Telescope, and it might lead to a large sample of binary AGNs with a 1-2 yr survey.
文章类型Article
关键词galaxies: active astrometry methods: data analysis
学科领域Astronomy & Astrophysics
DOI10.1051/0004-6361/201526266
收录类别SCI ; EI
WOS类目Astronomy & Astrophysics
WOS记录号WOS:000360020200133
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被引频次:1[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.ihep.ac.cn/handle/311005/228757
专题粒子天体物理中心
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Liu Y,Liu, Yuan. Finding binary active galactic nuclei by the centroid shift in imaging surveys[J]. ASTRONOMY & ASTROPHYSICS,2015,580:A133.
APA 刘元,&Liu, Yuan.(2015).Finding binary active galactic nuclei by the centroid shift in imaging surveys.ASTRONOMY & ASTROPHYSICS,580,A133.
MLA 刘元,et al."Finding binary active galactic nuclei by the centroid shift in imaging surveys".ASTRONOMY & ASTROPHYSICS 580(2015):A133.
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