Radiative efficiency of disc accretion in individual SDSS QSOs
文献类型：期刊论文
| 作者 | Wu, Shumei1,2 ; Lu, Youjun1; Zhang, Fupeng1,2; Lu, Ye1
|
| 刊名 | MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
 |
| 出版日期 | 2013-12-01 |
| 卷号 | 436期号:4页码:3271-3285 |
| 关键词 | accretion accretion discs black hole physics galaxies: active galaxies: nuclei quasars: general quasars: supermassive black holes |
| 英文摘要 | We estimate the radiative efficiency epsilon of individual type 1 SDSS QSOs by using their bolometric luminosities (L-bol) and accretion rate (M acc), which may be related to the assembly histories and spins of the central massive black holes (MBHs). We estimate L-bol by using the empirical spectral energy distributions of QSOs and M acc by fitting the observed optical luminosity (luminosities) with the thin accretion disc model, assuming the MBH masses given by the virial mass estimator(s) (M-center dot,M- vir). We find an apparent correlation between epsilon and M-center dot,M- vir, which is strong at redshift z less than or similar to 1.8, weak at z greater than or similar to 2 and consistent with that found by Davis and Laor for 80 Palomar Green (PG) QSOs at z < 0.5. To investigate whether this correlation is intrinsic or not, we construct a mock sample of QSOs according to the true MBH mass and Eddington ratio distributions given in Kelly and Shen. By comparing the results obtained from the mock sample with that from the SDSS sample, we demonstrate that the apparent epsilon-M-center dot,M- vir correlation can be produced by and mainly due to the selection effects of the SDSS sample and the bias induced by the usage of M-center dot,M- vir as the true MBH mass. The mean value of epsilon of those SDSS QSOs are consistent with being a constant similar or equal to 0.11-0.16 over the redshift range of 0.3 less than or similar to z less than or similar to 4. We conclude that the current SDSS QSO data are consistent with no strong intrinsic correlation between radiative efficiency and true MBH mass and no significant redshift evolution of radiative efficiencies. |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000327798100029 |
| 源URL | [http://ir.bao.ac.cn/handle/114a11/5944]  |
| 专题 | 国家天文台_星系宇宙学研究部 |
| 作者单位 | 1.Chinese Acad Sci, Natl Astron Observ, Beijing 100012, Peoples R China 2.Chinese Acad Sci, Grad Sch, Beijing 100049, Peoples R China |
| 推荐引用方式 GB/T 7714 | Wu, Shumei,Lu, Youjun,Zhang, Fupeng,et al. Radiative efficiency of disc accretion in individual SDSS QSOs[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,2013,436(4):3271-3285. |
| APA | Wu, Shumei,Lu, Youjun,Zhang, Fupeng,&Lu, Ye.(2013).Radiative efficiency of disc accretion in individual SDSS QSOs.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,436(4),3271-3285. |
| MLA | Wu, Shumei,et al."Radiative efficiency of disc accretion in individual SDSS QSOs".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 436.4(2013):3271-3285. |
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来源：国家天文台
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