Pregalactic black holes - A new constraint

Details Pregalactic black holes - A new constraint Pregalactic black holes - A new constraint

May 1979

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979gregr..10..633b&link_type=abstract

General Relativity and Gravitation, vol. 10, May 1979, p. 633-638.

Astronomy and Astrophysics

Astronomy

5

Astronomical Models, Black Holes (Astronomy), X Ray Sources, Abundance, Constraints, Cosmology, Galactic Evolution

Scientific paper

Pregalactic black holes accrete matter in the early universe and produce copious amounts of X radiation. By using observations of the background radiation in the X and gamma wavebands, a strong constraint is imposed upon their possible abundance. If pregalactic black holes are actually present, several outstanding problems of cosmogony can be resolved with typical pregalactic black hole masses of 100 solar masses. Significantly more massive holes cannot constitute an appreciable mass fraction of the universe and are limited by a specific mass-density bound.

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