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Supermassive black holes in the early universe

Published online by Cambridge University Press:  01 December 2004

M. Dietrich  and
F. Hamann
M. Dietrich
Affiliation:
Georgia State University, Department of Physics & Astronomy, Atlanta, GA 30303, USA email: dietrich@chara.gsu.edu
F. Hamann
Affiliation:
University of Florida, Department of Astronomy, Gainesville, FL 32611, USA email: hamann@astro.ufl.edu
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Abstract

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We analyzed spectra of 15 luminous high-redshift quasars (3.3<z<5.1) and we derived black hole masses that are based on Hβ, MgII, and CIV emission lines, in the range of $2\times10^8<M_{bh}<4\times10^{10} M_\odot$. Assuming exponential growth of the black holes we estimated that it takes about several 100 Myr up to 1 Gyr to accumulate the observed black hole masses, i.e., most of the SMBHs that power these quasars at high-redshifts, started to grow at $z \simeq 5 {\rm to} 10$.To search for other articles by the author(s) go to: http://adsabs.harvard.edu/abstract_service.html

Type
POSTERS
Information
Proceedings of the International Astronomical Union , Volume 2004 , Issue IAUS222 , March 2004 , pp. 517 - 518
Copyright
© 2004 International Astronomical Union