A Possible Mechanism to Form Low Mass Objects at Low Redshifts

Details A Possible Mechanism to Form Low Mass Objects at Low Redshifts A Possible Mechanism to Form Low Mass Objects at Low Redshifts

Aug 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005ap%26ss.298..509r&link_type=abstract

Astrophysics and Space Science, Volume 298, Issue 4, pp.509-518

Astronomy and Astrophysics

Astrophysics

Cosmology, Textures, Galaxy Formation

Scientific paper

We develop a quantitative criterion for the collapse of matter within a region where a global texture just collapsed and a non-zero peculiar velocity field is produced. We also describe the evolution of the density contrast in this region according to the non-linear spherical collapse model. In particular, we find that the overdensity needed to virialisation is reached at z ≤ 2.2, covering a mass range of about 104 107 M&sun; in the context of an Einstein-de Sitter universe.

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