Astronomy and Astrophysics – Astronomy
Scientific paper
Dec 2001
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001aas...199.5605s&link_type=abstract
American Astronomical Society, 199th AAS Meeting, #56.05; Bulletin of the American Astronomical Society, Vol. 33, p.1384
Astronomy and Astrophysics
Astronomy
Scientific paper
Some models of globular cluster formation predict that old globular clusters form in isolated dark matter halos at high redshifts. For example, the reionization-stimulated globular cluster formation model of Cen (2001) predicts that old globular clusters are formed in low mass (⪉ 108 { Msun}) dark matter halos around the redshift of reionization (zreion ~ 7). Following Cen, we use the Press-Schechter distribution for dark matter halo abundances to compute the abundance of globular clusters at high redshift. We follow the merging history of these globular cluster with the extended Press-Schechter model of Lacey & Cole (1993). We calibrate the model with old globular cluster abundances in the Milky Way, and predict the distribution of old globular clusters as a function of dark matter halo mass. We focus on a testable hypothesis of the model: this class of models predicts that some globular clusters should exist in isolation in the intergalactic medium. We compute the possibilities for testing this with sky surveys and follow-up observations.
Kamionkowski Marc
Santos Michael R.
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