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	An accretion disc-irradiation hybrid model for the optical/uv variability in radio-quiet quasars
	Liu, Hui1,2; Li, Shuang-Liang1; Gu, Minfeng1; Guo, Hengxiao1
刊名	Monthly notices of the royal astronomical society
	2016-10-11
卷号	462期号:1页码:L56-l60
关键词	Accretion, accretion discs Galaxies: active Quasars: general X-rays: general
ISSN号	0035-8711
DOI	10.1093/mnrasl/slw123
通讯作者	Liu, hui(liuhui@shao.ac.cn)
英文摘要	The optical/ultraviolet (uv) variability of quasars has been discovered to be correlated with other quasar properties, such as luminosity, black hole mass and rest-frame wavelength. however, the origin of variability has been a puzzle so far. in this work, we upgrade the accretion disc model, which assumed the variability is caused by the change of global mass accretion rate, by constraining the disc size to match the viscous time-scale of accretion disc to the variability time-scale observed and by including the irradiation/x-ray reprocessing to make the emitted spectrum become steeper. we find this hybrid model can reproduce the observed bluer-when-brighter trend quite well, which is used to validate the theoretical model by several works recently. the traditional correlation between the variability amplitude and rest-frame wavelength can also be well fitted by our model. in addition, a weak positive correlation between variability amplitude and black hole mass is present, qualitatively consistent with recent observations.
WOS关键词	ACTIVE GALACTIC NUCLEI ; BLACK-HOLE MASS ; SDSS STRIPE 82 ; X-RAY ; SPECTRAL VARIABILITY ; COLOR VARIABILITY ; EDDINGTON RATIO ; TYPE-1 AGN ; DEPENDENCE ; EMISSION
WOS研究方向	Astronomy & Astrophysics
WOS类目	Astronomy & Astrophysics
语种	英语
出版者	OXFORD UNIV PRESS
WOS记录号	WOS:000383516700012
内容类型	期刊论文
URI标识	http://www.corc.org.cn/handle/1471x/2375952
专题	中国科学院大学
通讯作者	Liu, Hui
作者单位	1.Chinese Acad Sci, Shanghai Astron Observ, Key Lab Res Galaxies & Cosmol, 80 Nandan Rd, Shanghai 200030, Peoples R China 2.Univ Chinese Acad Sci, 19A Yuquanlu, Beijing 100049, Peoples R China
推荐引用方式 GB/T 7714	Liu, Hui,Li, Shuang-Liang,Gu, Minfeng,et al. An accretion disc-irradiation hybrid model for the optical/uv variability in radio-quiet quasars[J]. Monthly notices of the royal astronomical society,2016,462(1):L56-l60.
APA	Liu, Hui,Li, Shuang-Liang,Gu, Minfeng,&Guo, Hengxiao.(2016).An accretion disc-irradiation hybrid model for the optical/uv variability in radio-quiet quasars.Monthly notices of the royal astronomical society,462(1),L56-l60.
MLA	Liu, Hui,et al."An accretion disc-irradiation hybrid model for the optical/uv variability in radio-quiet quasars".Monthly notices of the royal astronomical society 462.1(2016):L56-l60.

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