Probability Distribution of Primordial Angular Momentum and Formation of Massive Black Holes
نویسندگان
چکیده
This figure "fig2-1.png" is available in "png"" format from: This figure "fig3-1.png" is available in "png"" format from: This figure "fig4-1.png" is available in "png"" format from: This figure "fig5-1.png" is available in "png"" format from: This figure "fig6-1.png" is available in "png"" format from: ABSTRACT We consider the joint probability distribution function for the mass contrast and angular momentum of over-density regions on the protogalactic scale and investigate the formation of massive black holes at redshift z > 10. We estimate the growth rate of the angular momentum by the linear perturbation theory and the decay rate by the Compton drag and apply the Press-Schechter theory to obtain the formation rate of massive black holes, assuming the full reionization of the universe at z = z ion 10. We nd the correlation between the mass contrast and angular momentum vanishes in the linear theory. However, application of the Press-Schechter theory introduces a correlation between the mass contrast and angular momentum of bound objects. Using thus obtained probability distribution, we calculate the mass fraction of black holes with M 10 6 10 8 M in the universe. We nd that it crucially depends on the reionization epoch z ion. Speciically, for the standard CDM power spectrum with the COBE normalization, the condition z ion > 500 must be satissed to reproduce the observed number density of QSOs.
منابع مشابه
Probability Distribution of Primordial Angular Momentum and Formation of Massive Black Holes Hajime SUSA
We consider the joint probability distribution function for the mass contrast and angular momentum of over-density regions on the protogalactic scale and investigate the formation of massive black holes at redshift z > 10. We estimate the growth rate of the angular momentum by the linear perturbation theory and the decay rate by the Compton drag and apply the Press-Schechter theory to obtain th...
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