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- W3102153558 endingPage "36" @default.
- W3102153558 startingPage "36" @default.
- W3102153558 abstract "An increasing body of data reveals a one-to-one linear correlation between galaxy halo mass and the total mass in its globular cluster (GC) population, M_{GCS} ~ M_h^{1.03 pm 0.03}, valid over 5 orders of magnitude. We explore the nature of this correlation for galaxies of different morphological types, and for the subpopulations of metal-poor (blue) and metal-rich (red) GCs. For the subpopulations of different metallicity we find M_{GCS}(blue) ~ M_h^{0.96 pm 0.03} and M_{GCS}(red) ~ M_h^{1.21 pm 0.03} with similar scatter. The numerical values of these exponents can be derived from the detailed behavior of the red and blue GC fractions with galaxy mass and provide a self-consistent set of relations. In addition, all morphological types (E, S0, S/Irr) follow the same relation, but with a second-order trend for spiral galaxies to have a slightly higher fraction of metal-rich GCs for a given mass. These results suggest that the amount of gas available for GC formation at high redshift was in nearly direct proportion to the dark-matter halo potential, in strong contrast to the markedly nonlinear behavior of total stellar mass versus halo mass. Of the few available theoretical treatments that directly discuss the formation of GCs in a hierarchical merging framework,the model of Kravtsov & Gnedin (2005) best matches these observations. They find that the blue, metal-poor GCs formed in small halos at $z > 3$ and did so in nearly direct proportion to halo mass. Similar models addressing the formation rate of the red, metal-richer GCs in the same detail and continuing to lower redshift are still needed for a comprehensive picture." @default.
- W3102153558 created "2020-11-23" @default.
- W3102153558 creator A5021576595 @default.
- W3102153558 creator A5024584554 @default.
- W3102153558 creator A5052474681 @default.
- W3102153558 date "2015-06-05" @default.
- W3102153558 modified "2023-10-09" @default.
- W3102153558 title "DARK MATTER HALOS IN GALAXIES AND GLOBULAR CLUSTER POPULATIONS. II. METALLICITY AND MORPHOLOGY" @default.
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- W3102153558 doi "https://doi.org/10.1088/0004-637x/806/1/36" @default.
- W3102153558 hasPublicationYear "2015" @default.
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