Monitoring AGNs with H beta Asymmetry. I. First Results: Velocity-resolved Reverberation Mapping

doi:10.3847/1538-4357/aaed2c

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	Monitoring AGNs with H beta Asymmetry. I. First Results: Velocity-resolved Reverberation Mapping
	MAHA Collaboration
刊名	ASTROPHYSICAL JOURNAL
	2018
卷号	869 期号:2 页码:142
关键词	galaxies: active galaxies: nuclei quasars: supermassive black holes
ISSN号	0004-637X
DOI	10.3847/1538-4357/aaed2c
文献子类	Article
英文摘要	We have started a long-term reverberation mapping (RM) project using the Wyoming Infrared Observatory 2.3 m telescope titled "Monitoring AGNs with H beta Asymmetry" (MAHA). The motivations of the project are to explore the geometry and kinematics of the gas responsible for complex H beta emission-line profiles, ideally leading to an understanding of the structures and origins of the broad-line region (BLR). Furthermore, such a project provides the opportunity to search for evidence of close binary supermassive black holes. We describe MAHA and report initial results from our first campaign, from 2016 December to 2017 May, highlighting velocity-resolved time lags for four active galactic nuclei (AGNs) with asymmetric H beta lines. We find that 3C 120, Ark 120, and Mrk 6 display complex features different from the simple signatures expected for pure outflow, inflow, or a Keplerian disk. While three of the objects have been previously reverberation mapped, including velocity-resolved time lags in the cases of 3C 120 and Mrk 6, we report a time lag and corresponding black hole mass measurement for SBS 1518+593 for the first time. Furthermore, SBS 1518+593, the least asymmetric of the four, does show velocity-resolved time lags characteristic of a Keplerian disk or virialized motion more generally. Also, the velocity-resolved time lags of 3C 120 have significantly changed since previously observed, indicating an evolution of its BLR structure. Future analyses of the data for these objects and others in MAHA will explore the full diversity of H beta lines and the physics of AGN BLRs.
电子版国际标准刊号	1538-4357
WOS关键词	BROAD-LINE REGION ; ACTIVE GALACTIC NUCLEI ; BLACK-HOLE BINARY ; PEAKED EMISSION-LINES ; SPECTRAL VARIABILITY ; SEYFERT-GALAXIES ; CENTRAL MASSES ; TELL US ; QUASAR ; PROJECT
WOS研究方向	Astronomy & Astrophysics
语种	英语
WOS记录号	WOS:000454073700013
内容类型	期刊论文
源URL	[http://ir.ihep.ac.cn/handle/311005/286986]
专题	高能物理研究所_粒子天体物理中心
作者单位	中国科学院高能物理研究所
推荐引用方式 GB/T 7714	MAHA Collaboration. Monitoring AGNs with H beta Asymmetry. I. First Results: Velocity-resolved Reverberation Mapping[J]. ASTROPHYSICAL JOURNAL,2018,869(2):142.
APA	MAHA Collaboration.(2018).Monitoring AGNs with H beta Asymmetry. I. First Results: Velocity-resolved Reverberation Mapping.ASTROPHYSICAL JOURNAL,869(2),142.
MLA	MAHA Collaboration."Monitoring AGNs with H beta Asymmetry. I. First Results: Velocity-resolved Reverberation Mapping".ASTROPHYSICAL JOURNAL 869.2(2018):142.