Formation of voids from negative density perturbations

Details Formation of voids from negative density perturbations Formation of voids from negative density perturbations

Feb 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990apj...350..502d&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 350, Feb. 20, 1990, p. 502-504. Research supported by FAPESP and CNPq.

Astronomy and Astrophysics

Astrophysics

12

Cosmology, Mass Distribution, Perturbation Theory, Density (Mass/Volume), Galactic Clusters, Galactic Evolution

Scientific paper

A study is conducted of the effect of such nongravitational physical processes (NPPs) as photon drag and photon cooling in the formation of voids from negative density perturbations. The magnitude of initial density perturbation is obtained, using the same mass dependence as in the positive perturbation study of de Araujo and Opher (1988). It is found that the inclusion of NPPs generates drag, impeding underdense region formation and enhancing their present density. A specific spectrum of negative perturbations is discussed.

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