Dark matter and dark energy accretion onto intermediate-mass black holes

Details Dark matter and dark energy accretion onto intermediate-mass black holes Dark matter and dark energy accretion onto intermediate-mass black holes

2011-11-23

arxiv.org/abs/1111.5605v2

MNRAS, 420, 3298-3302 (2012)

Astronomy and Astrophysics

Astrophysics

High Energy Astrophysical Phenomena

5 pages, 3 figures, Published in MNRAS

Scientific paper

In this work we investigate the accretion of cosmological fluids onto an intermediate-mass black hole at the centre of a globular cluster, focusing on the influence of the parent stellar system on the accretion flow. We show that the accretion of cosmic background radiation and the so-called dark energy onto an intermediate-mass black hole is negligible. On the other hand, if cold dark matter has a nonvanishing pressure, the accretion of dark matter is large enough to increase the black hole mass well beyond the present observed upper limits. We conclude that either intermediate-mass black holes do not exist, or dark matter does not exist, or it is not strictly collisionless. In the latter case, we set a lower limit for the parameter of the cold dark matter equation of state.

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