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Massive black holes in galactic halos?

Lacey, C.G.; Ostriker, J.P.

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J.P. Ostriker


The authors consider the idea that galaxy halos are composed of massive black holes as a possible resolution of two problems: the composition of dark halos, and the heating of stellar disks. It is found that in order to account for the amount of disk heating that is observed in our Galaxy and several others, the black holes must have masses MH ≡ 106M_sun;. This heating mechanism makes predictions for the dependence of the velocity dispersion on time, and for the shape of the velocity ellipsoid, that are in good agreement with observations. The authors consider the constraints on this picture set by dynamical friction causing black holes to spiral to the galactic center, by the possible presence of dark matter in dwarf spheroidal galaxies, and by the accretion of interstellar gas by the black holes producing luminous objects in the Galaxy.


Lacey, C., & Ostriker, J. (1985). Massive black holes in galactic halos?. Astrophysical Journal, 299, 633-652.

Journal Article Type Article
Publication Date Dec 15, 1985
Deposit Date May 22, 2015
Publicly Available Date May 22, 2015
Journal Astrophysical Journal
Print ISSN 0004-637X
Electronic ISSN 1538-4357
Publisher American Astronomical Society
Peer Reviewed Peer Reviewed
Volume 299
Pages 633-652
Related Public URLs


Published Journal Article (383 Kb)

Copyright Statement
© 1985. The American Astronomical Society. All rights reserved. Printed in the U.S.A.

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