| Growth of Black Holes and Their Host Spheroids in （Sub）mm-loud High-Redshift QSOs |
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| 作者姓名： | Cai-Na Hao Xiao-Yang Xia Shu-De Mao Zu-Gan Deng Hong Wu |
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| 作者单位： | [1]Tianjin Astrophysics Center, Tianjin Normal University, Tianjin 300384 [2]National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100012 [3]Institute of Astronomy, University of Cambridge, Madingley Road, Cambridge CB3 0HA, UK [4]Jodrell Bank Observatory, University of Manchester, Macclesfield, Cheshire SK11 9DL, UK [5]Graduate School of Chinese Academy of Sciences, Beijing 100049 |
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| 基金项目： | Supported by the National Natural Science Foundation of China.Acknowledgements We thank E Cox, X. Fan and Y. Gao for helpful advice and discussions. Thanks are also due to R. Kennicutt for helpful discussions on the star formation rate estimators. This project is supported by the NSFC Grants 10333060 and 10778622. SM acknowledges partial travel support from the Chinese Academy of Sciences and a visiting professorship from Tianjin Normal University. |
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| 摘 要： | We study the growth of black holes and stellar population in spheroids at high redshift using several （sub）mm-loud QSO samples. Applying the same criteria established in an earlier work, we find that, similar to IR QSOs at low redshift, the far-infrared emission of these （sub）mm-loud QSOs mainly originates from dust heated by starbursts. By combining low-z IR QSOs and high-z （sub）mm-loud QSOs, we find a trend that the star formation rate （M＊） increases with the accretion rate （Mace）. We compare the values of M＊/Macc for submm emitting galaxies （SMGs）, far-infrared ultraluminous/hypeduminous QSOs and typical QSOs, and construct a likely evolution scenario for these objects. The （sub）mm-loud QSO transition phase has both high Macc and M＊ and hence is important for establishing the correlation between the masses of black holes and spheroids.
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| 关 键 词： | 星系 进化星系 强红移星系 普通星系 类星体 |
| 收稿时间： | 2007-04-25 |
| 修稿时间： | 2007-05-12 |
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