Astronomy and Astrophysics – Astronomy
Scientific paper
Mar 2010
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010newar..54..173p&link_type=abstract
New Astronomy Reviews, Volume 54, Issue 3-6, p. 173-177.
Astronomy and Astrophysics
Astronomy
Scientific paper
An ultra-luminous X-ray source, such as the one in M82, may very well be a signature of the presence of a black hole of intermediate mass. Such a black hole can be formed in a young and dense star cluster during the core collapse of the cluster, and subsequently capture a massive companion star. As the captured companion evolves it will overflow its Roche-lobe to start an episode of mass transfer. As long as the donor is still on the main-sequence, the mass transfer rate will be insufficient to power an ultra-luminous X-ray source, but as soon as it ascends the giant branch the X-ray luminosity increases by more than two orders of magnitude. Eventually, the companion to the intermediate mass black hole collapses to a black hole or a neutron star in a supernova explosion. In the latter case, the former X-ray source will become visible as a radio pulsar in orbit around an intermediate mass black hole. We predict that several of such sources will be detectable with the Low Frequency Array LOFAR.
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