A UNIFORMLY SELECTED SAMPLE OF LOW-MASS BLACK HOLES IN SEYFERT 1 GALAXIES
文献类型：期刊论文
| 作者 | Dong, Xiao-Bo1,2; Ho, Luis C.2; Yuan, Weimin3 ; Wang, Ting-Gui1; Fan, Xiaohui4; Zhou, Hongyan1,5; Jiang, Ning1
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| 刊名 | ASTROPHYSICAL JOURNAL
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| 出版日期 | 2012-08-20 |
| 卷号 | 755期号:2 |
| 关键词 | galaxies: active galaxies: nuclei galaxies: Seyfert |
| 英文摘要 | We have conducted a systematic search of low-mass black holes (BHs) in active galactic nuclei (AGNs) with broad H alpha emission lines, aiming at building a homogeneous sample that is more complete than previous ones for fainter, less highly accreting sources. For this purpose, we developed a set of elaborate, automated selection procedures and applied it uniformly to the Fourth Data Release of the Sloan Digital Sky Survey. Special attention is given to AGN-galaxy spectral decomposition and emission-line deblending. We define a sample of 309 type 1 AGNs with BH masses in the range 8 x 10(4)-2 x 10(6) M-circle dot (with a median of 1.2 x 10(6) M-circle dot), using the virial mass estimator based on the broad H alpha line. About half of our sample of low-mass BHs differs from that of Greene & Ho, with 61 of them discovered here for the first time. Our new sample picks up more AGNs with low accretion rates: the Eddington ratios of the present sample range from less than or similar to 0.01 to similar to 1, with 30% below 0.1. This suggests that a significant fraction of low-mass BHs in the local universe are accreting at low rates. The host galaxies of the low-mass BHs have luminosities similar to those of L* field galaxies, optical colors of Sbc spirals, and stellar spectral features consistent with a continuous star formation history with a mean stellar age of less than 1 Gyr. |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000307791400084 |
| 源URL | [http://ir.bao.ac.cn/handle/114a11/6305]  |
| 专题 | 国家天文台_空间科学研究部 |
| 作者单位 | 1.Univ Sci & Technol China, Chinese Acad Sci, Dept Astron, Key Lab Res Galaxies & Cosmol, Hefei 230026, Anhui, Peoples R China 2.Observ Carnegie Inst Sci, Pasadena, CA 91101 USA 3.Chinese Acad Sci, Natl Astron Observ, Beijing 100012, Peoples R China 4.Univ Arizona, Steward Observ, Tucson, AZ 85721 USA 5.Polar Res Inst China, Shanghai 200136, Peoples R China |
| 推荐引用方式 GB/T 7714 | Dong, Xiao-Bo,Ho, Luis C.,Yuan, Weimin,et al. A UNIFORMLY SELECTED SAMPLE OF LOW-MASS BLACK HOLES IN SEYFERT 1 GALAXIES[J]. ASTROPHYSICAL JOURNAL,2012,755(2). |
| APA | Dong, Xiao-Bo.,Ho, Luis C..,Yuan, Weimin.,Wang, Ting-Gui.,Fan, Xiaohui.,...&Jiang, Ning.(2012).A UNIFORMLY SELECTED SAMPLE OF LOW-MASS BLACK HOLES IN SEYFERT 1 GALAXIES.ASTROPHYSICAL JOURNAL,755(2). |
| MLA | Dong, Xiao-Bo,et al."A UNIFORMLY SELECTED SAMPLE OF LOW-MASS BLACK HOLES IN SEYFERT 1 GALAXIES".ASTROPHYSICAL JOURNAL 755.2(2012). |
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来源：国家天文台
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