The statistical clustering of primordial black holes

Details The statistical clustering of primordial black holes The statistical clustering of primordial black holes

Apr 1977

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1977a%26a....56..377c&link_type=abstract

Astronomy and Astrophysics, vol. 56, no. 3, Apr. 1977, p. 377-383.

Astronomy and Astrophysics

Astronomy

31

Black Holes (Astronomy), Cosmology, Density (Number/Volume), Galactic Evolution, Statistical Distributions, Astrodynamics, Fluctuation Theory, Galactic Mass, Gravitational Effects, Mass Spectra, Perturbation Theory

Scientific paper

It is shown that Meszaros' (1975) theory of galaxy formation, in which galaxies form from density perturbations associated with the statistical fluctuation in the number density of primordial black holes, must be modified if the black holes are initially surrounded by regions of lower radiation density than average (as is most likely). However, even in this situation, the sort of effect Meszaros envisages does occur and could in principle cause galactic mass scales to bind at the conventional time. In fact, the requirement that galaxies should not form prematurely implies that black holes could not have a critical density in the mass range above 100,000 solar masses. If the mass spectrum of primordial black holes falls off more slowly than the inverse cube of mass, (as expected), the biggest black holes have the largest clustering effect. In this case, the black-hole clustering theory of galaxy formation reduces to the black-hole seed theory of galaxy formation, in which each galaxy becomes bound under the gravitational influence of a single black-hole nucleus.

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