Collapse of Population III objects induced by cold collisionless dark matter

Details Collapse of Population III objects induced by cold collisionless dark matter Collapse of Population III objects induced by cold collisionless dark matter

Oct 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991apj...379..461d&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 379, Oct. 1, 1991, p. 461-465. Research supported by FAPESP and CNPq.

Astronomy and Astrophysics

Astrophysics

14

Baryons, Collisionless Plasmas, Cosmology, Dark Matter, Hydrodynamic Equations, Photoionization, Photons

Scientific paper

The formation of Population III objects that can be formed by cold collisionless dark matter is studied. It is assumed that at the beginning of the recombination era there exist perturbations only in the dark matter. It is found, for example, that for a universe that contains a greater quantity of dark matter, the collapse occurs faster for a given perturbed dark matter mass, M(d) but a smaller quantity of baryonic mass is carried with it. For a given universe it is found that for larger M(d) a greater fraction of baryonic matter, M(bc)/M(bi), follows the dark matter collapse, where M(bi) is the baryonic mass in the perturbed dark matter region at the beginning of the recombination era and M(bc) is the baryonic mass in the perturbed dark matter region after turnaround at the time of collapse.

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