Suppression of star formation in early-type galaxies by feedback from supermassive black holes
Article Abstract:
The ultraviolet emissions of massive early-type galaxies are observed and analyzed by deriving an empirical relation for a critical black-hole mass above which the outflows from these black holes suppress star formation in their hosts by heating and expelling all available cold gas. Results show that supermassive black holes are negligible in mass compared to their hosts but seem to play a critical role in the star formation history of galaxies.
Publication Name: Nature
Subject: Zoology and wildlife conservation
ISSN: 0028-0836
Year: 2006
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The magnetic nature of disk accretion onto black holes
Article Abstract:
An X-ray-absorbing wind discovered in an observation of the stellar-mass black hole binary GRO J1655-40 is reported, which must be powered by a magnetic process that can also drive accretion through the disk. The results provide a rare and crucial insight into the nature of the processes that drive disc accretion in black holes.
Publication Name: Nature
Subject: Zoology and wildlife conservation
ISSN: 0028-0836
Year: 2006
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How to make a massive star
Article Abstract:
The origin of high mass stars is described by applying two competing theories namely accretion and merger. Observation of two stellar systems suggests that the accretion model has a weightier claim than its rival merger model.
Publication Name: Nature
Subject: Zoology and wildlife conservation
ISSN: 0028-0836
Year: 2005
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