Rapid growth of black holes in massive star-forming galaxies

D. M. Alexander, I. Small, F. E. Bauer, S. C. Chapman, A. W. Blain, W. N. Brandt, R. J. Ivison

Research output: Contribution to journalArticlepeer-review

182 Scopus citations

Abstract

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 per cent of the total cosmological black-hole growth. As typical quasars are not, however, undergoing intense star formation and already host massive black holes (>108M, where M is the solar mass), there must have been an earlier pre-quasar phase when these black holes grew (mass range ∼(106-108)M). The likely signature of this earlier stage is simultaneous black-hole growth and star formation in distant (redshift 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.

Original languageEnglish (US)
Pages (from-to)738-740
Number of pages3
JournalNature
Volume434
Issue number7034
DOIs
StatePublished - Apr 7 2005

All Science Journal Classification (ASJC) codes

  • General

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