Journal
ASTROPHYSICAL JOURNAL LETTERS
Volume 712, Issue 2, Pages L184-L188Publisher
IOP PUBLISHING LTD
DOI: 10.1088/2041-8205/712/2/L184
Keywords
galaxies: formation; galaxies: starburst; globular clusters: general; stars: formation
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The log-normal shape of the mass function for metal-poor halo globular clusters is proposed to result from an initial M(-2) power law modified rapidly by evaporation, collisions with clouds, and mutual cluster interactions in the dense environment of a redshift z similar to 5-15 disk galaxy. Galaxy interactions subsequently spray these clusters into the galaxy group environment, where they fall into other growing galaxies and populate their halos. Clusters forming later in z similar to 2-5 galaxies, and those formed during major mergers, produce metal-rich globulars. Monte Carlo models of evolving cluster populations demonstrate the early formation of a log-normal mass function for typical conditions in high-redshift galaxies.
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