Journal
ASTROPHYSICAL JOURNAL LETTERS
Volume 685, Issue 1, Pages L31-L34Publisher
IOP PUBLISHING LTD
DOI: 10.1086/592271
Keywords
galaxies: formation; galaxies: star clusters; instabilities; ISM: evolution
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We study gravitational instabilities in disks, with special attention to the most massive clumps that form because they are expected to be the progenitors of globular-type clusters. The maximum unstable mass is set by rotation and depends only on the surface density and orbital frequency of the disk. We propose that the formation of massive clusters is related to this largest scale in galaxies not stabilized by rotation. Using data from the literature, we predict that globular-like clusters can form in nuclear starburst disks and protogalactic disks but not in typical spiral galaxies, in agreement with observations.
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