An accretion disc-irradiation hybrid model for the optical/uv variability in radio-quiet quasars
文献类型：期刊论文
| 作者 | Liu, Hui1,2; Li, Shuang-Liang1; Gu, Minfeng1; Guo, Hengxiao1 |
| 刊名 | Monthly notices of the royal astronomical society
 |
| 出版日期 | 2016-10-11 |
| 卷号 | 462期号:1页码:L56-l60 |
| ISSN号 | 0035-8711 |
| 关键词 | Accretion, accretion discs Galaxies: active Quasars: general X-rays: general |
| 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 |
| URI标识 | http://www.irgrid.ac.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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来源：中国科学院大学
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