کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1780326 | 1523804 | 2006 | 4 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
On the evolution of the black-hole:spheroid mass ratio
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
فیزیک و نجوم
نجوم و فیزیک نجومی
پیش نمایش صفحه اول مقاله
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چکیده انگلیسی
We present the results of a study which uses the 3CRR sample of radio-loud active galactic nuclei (AGN) to investigate the evolution of the black-hole:spheroid relation in the most massive early-type galaxies from 0 < z < 2. Radio-loud unification is exploited to obtain virial (line-width) black-hole mass estimates from the 3CRR quasars, and stellar mass estimates from the 3CRR radio galaxies, thereby providing black-hole and stellar mass estimates for a single population of early-type galaxies. At low redshift (z < 1) the 3CRR sample is consistent with a black-hole:spheroid ratio of Mbh/Msph â 0.002, in good agreement with that observed locally for quiescent galaxies of similar stellar mass (Msph â 5 Ã 1011Mâ). However, the 3CRR black-hole:spheroid ratio is found to evolve as Mbh/Msph â (1 + z)2.07±0.76, reaching Mbh/Msph â 0.008 by redshift z â 2, providing further evidence that, at least for massive early-type galaxies, the growth of the central supermassive black-hole may be completed before that of the host spheroid.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: New Astronomy Reviews - Volume 50, Issues 9â10, November 2006, Pages 782-785
Journal: New Astronomy Reviews - Volume 50, Issues 9â10, November 2006, Pages 782-785
نویسندگان
R.J. McLure, M.J. Jarvis, T.A. Targett, J.S. Dunlop, P.N. Best,