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Date and Time of the Query: 2019-07-24 T02:46:44 PDT
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For refcode 2003ApJ...585..714M:
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2003ApJ...585..714M Intergalactic Globular Clusters and the Faint End of the Galaxy Number Counts in A1656 (Coma) A. Marin-Franch and A. Aparicio Received 2002 July 8; accepted 2002 November 21 ABSTRACT The existence of an intergalactic globular cluster population in the Coma cluster of galaxies has been tested using surface brightness fluctuations. The main result is that the intergalactic globular cluster surface density (N_IGC_) does not correlate with the distance to the center of Coma and hence with the environment. Furthermore, comparing these results with different Coma mass distribution model predictions, it is suggested that N_IGC_ must in fact be zero all over Coma. On the other hand, the results for N_IGC_ and the faint end of the galaxy number counts (beyond m_R_ = 23.5) are connected. So N_IGC_ = 0 settles the slope of this function, which turns out to be {gamma} = 0.36 +/- 0.01 down to m_R_ = 26.5. The fact that N_IGC_ = 0 all over Coma suggests that globular clusters were formed only, or almost only, from protogalactic clouds. None, or perhaps very few, could have formed in isolated regions. It also seems inappropriate to advocate a relationship between intergalactic globular clusters and dark matter distributions, although it is true that the relationship could still exist but not be strong enough to have been detected. Finally, since our conclusion is that intergalactic globular clusters do not exist in Coma, accretion of intergalactic globular clusters might not be significant in galaxy formation and evolutionary processes in the Coma galaxies. Subject headings: galaxies: clusters: individual (Coma) - galaxies: evolution - galaxies: formation - galaxies: luminosity function, mass function - galaxies: star clusters
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