A note on periodicity of long-term variations of optical continuum in active galactic nuclei
A note on periodicity of long-term variations of optical continuum in active galactic nuclei
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关于活动星系核中光学连续谱长期变化周期性的注记
DOI:
10.1093/mnrasl/slw062
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发表时间:
2016-04
影响因子:
4.8
通讯作者:
Wang Jian-Ming
中科院分区:
文献类型:
--
作者:
Lu Kai-Xing;Li Yan-Rong;Bi Shao-Lan;Wang Jian-Ming
Graham et al. found a sample of active galactic nuclei (AGNs) and quasars from the Catalina Real-time Transient Survey (CRTS) that have long-term periodic variations in optical continuum, the nature of the periodicity remains uncertain. We investigate the periodic variability characteristics of the sample by testing the relations of the observed variability periods with AGN optical luminosity, black hole mass and accretion rates, and find no significant correlations. We also test the observed periods in several different aspects related to accretion disks surrounding single black holes, such as the Keplerian rotational periods of 5100~\AA\ photon-emission regions and self-gravity dominated regions and the precessing period of warped disks. These tests shed new lights on understanding AGN variability in general. Under the assumption that the periodic behavior is associated with SMBHB systems in particular, we compare the separations ($\mathscr{D}_{\bullet}$) against characteristic radii of broad-line regions ($R_{\rm BLR}$) of the binaries and find $\mathscr{D}_{\bullet}$$\approx$ 0.05 $R_{\rm BLR}$. This interestingly implies that these binaries have only circumbinary BLRs.
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DOI:
10.1088/2041-8205/803/2/l16
发表时间:
2015-03
期刊:
The Astrophysical Journal Letters
影响因子:
--
作者:
Tingting Liu;S. Gezari;S. Heinis;E. Magnier;W. Burgett;K. Chambers;H. Flewelling;M. Huber;K. Hodapp;N. Kaiser;R. Kudritzki;J. Tonry;R. Wainscoat;C. Waters
通讯作者:
Tingting Liu;S. Gezari;S. Heinis;E. Magnier;W. Burgett;K. Chambers;H. Flewelling;M. Huber;K. Hodapp;N. Kaiser;R. Kudritzki;J. Tonry;R. Wainscoat;C. Waters
DOI:
--
发表时间:
2004
期刊:
--
影响因子:
--
作者:
通讯作者:
--
DOI:
10.1086/587475
发表时间:
2007-09
期刊:
The Astrophysical Journal
影响因子:
--
作者:
Yue Shen;J. Greene;M. Strauss;G. Richards;D. Schneider
通讯作者:
Yue Shen;J. Greene;M. Strauss;G. Richards;D. Schneider
DOI:
10.1088/0004-637x/725/1/249
发表时间:
2009-12
期刊:
The Astrophysical Journal
影响因子:
--
作者:
Yue Shen;A. Loeb
通讯作者:
Yue Shen;A. Loeb
影响因子:
6.5
作者:
Abramowicz, MA;Kluzniak, W
通讯作者:
Kluzniak, W