Structure of Dark Matter Halos from Hierarchical Clustering
نویسندگان
چکیده
منابع مشابه
Structure of Dark Matter Halos From Hierarchical Clustering
We investigate the structure of the dark matter halo formed in the cold dark matter scenario using N -body simulations. We simulated 12 halos with the mass of 6.6×10M⊙ to 8.0×10 M⊙. In almost all runs, the halos have density cusps proportional to r developed at the center, which is consistent with the results of recent high-resolution calculations. The density structure evolves in a self-simila...
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We investigate the structure of the dark matter halo formed in the cold dark matter scenario using N -body simulations. We simulated 12 halos with the mass of 4.3×10M⊙ to 7.9×10 M⊙. In almost all runs, the halos have density cusps proportional to r developed at the center, which is consistent with the results of recent high-resolution calculations. The density structure evolves in a self-simila...
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During hierarchical clustering, smaller masses generally collapse earlier than larger masses and so are denser on the average. The core of a small mass halo could be dense enough to resist disruption and survive undigested, when it is incorporated into a bigger object. We explore the possibility that a nested sequence of undigested cores in the center of the halo, which have survived the hierar...
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We investigate the structure of the dark matter halo formed in three different cold dark matter scenarios. We performed N-body simulations of formation of 13 cluster-sized halos. In all runs, density cusps proportional to r developed at the center. This result was independent of the cosmological models we simulated. We could not reproduce the cusp shallower than r, which was obtained in some of...
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1. I n t r o d u c t i o n Dark matter halos are often modelled as isothermal potential wells whose depth is usually identified with the velocity dispersion of stars in spheroidal galaxies or with the disk rotation speed in spirals. Since velocity dispersion increases with galaxy luminosity, this implies that more massive halos should surround brighter galaxies, a hypothesis that, however, does...
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ژورنال
عنوان ژورنال: The Astrophysical Journal
سال: 2001
ISSN: 0004-637X,1538-4357
DOI: 10.1086/321666