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Rapid Growth of Black Holes in Massive Star-Forming Galaxies

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posted on 2016-01-06, 10:36 authored by D. M. Alexander, I. Smail, F. E. Bauer, S. C. Chapman, Andrew William Blain, W. N. Brandt, R. J. Ivison
The tight relationship between the masses of black holes and galaxy spheroids in nearby galaxies implies a causal connection between the growth of these two components. Optically luminous quasars host the most prodigious accreting black holes in the Universe and can account for >30% of the total cosmological black-hole growth. As typical quasars are not, however, undergoing intense star formation and already host massive black holes [>10^(8) M(Sun)], there must have been an earlier pre-quasar phase when these black holes grew [mass range ~10^(6)-10^(8) M(Sun)]. The likely signature of this earlier stage is simultaneous black-hole growth and star formation in distant (i.e., z>1; >8 billion light years away) luminous galaxies. Here we report ultra-deep X-ray observations of distant star-forming galaxies that are bright at submillimetre wavelengths. We find that the black holes in these galaxies are growing almost continuously throughout periods of intense star formation. This activity appears to be more tightly associated with these galaxies than any other coeval galaxy populations. We show that the black-hole growth from these galaxies is consistent with that expected for the pre-quasar phase.

History

Citation

Nature, 2005, 434, pp. 738-740

Author affiliation

/Organisation/COLLEGE OF SCIENCE AND ENGINEERING/Department of Physics and Astronomy

Version

  • AM (Accepted Manuscript)

Published in

Nature

Publisher

Nature Publishing Group

issn

0028-0836

eissn

1476-4687

Acceptance date

2005-02-11

Copyright date

2005

Available date

2016-01-06

Publisher version

http://www.nature.com/nature/journal/v434/n7034/full/nature03473.html

Notes

5 pages, 2 figures, to appear in Nature on 7th April

Language

en

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