Naoz, SmadarNarayan, Ramesh2016-08-032014Naoz, Smadar, and Ramesh Narayan. 2014. “Globular Clusters and Dark Satellite Galaxies Through the Stream Velocity.” The Astrophysical Journal 791 (1) (July 23): L8. doi:10.1088/2041-8205/791/1/l8.2041-8213http://nrs.harvard.edu/urn-3:HUL.InstRepos:27802011The formation of purely baryonic globular clusters with no gravitationally bound dark matter is still a theoretical challenge. We show that these objects might form naturally whenever there is a relative stream velocity between baryons and dark matter. The stream velocity causes a phase shift between linear modes of baryonic and dark matter perturbations, which translates to a spatial offset between the two components when they collapse. For a 2σ (3σ) density fluctuation, baryonic clumps with masses in the range 105−2.5×106 M⊙ (105−4×106 M⊙) collapse outside the virial radii of their counterpart dark matter halos. These objects could survive as long-lived dark matter-free objects and might conceivably become globular clusters. In addition, their dark matter counterparts, which were deprived of gas, might become dark satellite galaxies.en-USJournal Article2016-08-0310.1088/2041-8205/791/1/L8