Results 41 to 50 of about 1,359 (236)
Flat Galaxies with Dark Matter Halos—Existence and Stability [PDF]
Communications in Mathematical Physics, 2009 We consider a model for a flat, disk-like galaxy surrounded by a halo of dark matter, namely a Vlasov-Poisson type system with two particle species, the stars which are restricted to the galactic plane and the dark matter particles. These constituents interact only through the gravitational potential which stars and dark matter create collectively ...
Fiřt, Roman +2 more
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Galaxy Disruption in a Halo of Dark Matter
Science, 2003 The relics of disrupted satellite galaxies have been found around the Milky Way and Andromeda, but direct evidence of a satellite galaxy in the early stages of disruption has remained elusive. We have discovered a dwarf satellite galaxy in the process of being torn apart by gravitational tidal forces as it merges with a larger galaxy's dark matter halo.
Forbes, Duncan A. +4 more
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Dark Matter Halos around Galaxies
, 1997 27 pages, latex, 18 figures. Review to appear in "Dark and Visible Matter in Galaxies". Proceedings of the Sesto DM1996 Conference Eds M. Persic & P. Salucci. ASP Proceedings Conference Series 1997 also available at ftp://galileo.sissa.it/users/ftp/pub/psrot/persucci ...
Salucci, Paolo, Persic M.
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Galaxy rotation favors prolate dark matter haloes
Physical Review D, 2023 26 pages, original primary work, about 40 plots, 1.4 Mbytes. v2: small latex and edition fixes (repeated label, overlapping paragraphs, shortened a table to 1-column format, etc.)
Adriana Bariego-Quintana +2 more
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The Effect of Splashback on Weak Lensing Mass Estimates of Galaxy Clusters and Groups
The Open Journal of Astrophysics, 2023 The splashback radius of a dark matter halo, which corresponds to the first apocenter radius reached by infalling matter and substructures, has been detected around galaxy clusters using a multitude of observational methods, including weak lensing ...
Yuanyuan Zhang +5 more
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SpheCow: Flexible dynamical models for galaxies and dark matter haloes [PDF]
Astronomy & Astrophysics, 2021 Simple but flexible dynamical models are useful for many purposes, including serving as the starting point for more complex models or numerical simulations of galaxies, clusters, or dark matter haloes. We presentSpheCow, a new light-weight and flexible code that allows one to easily explore the structure and dynamics of any spherical model. Assuming an
Maarten Baes +2 more
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Modeling galaxy halos using dark matter with pressure
Physical Review D, 2003 We investigate whether a dark matter with substantial amounts of pressure, comparable in magnitude to the energy density, could be a viable candidate for the constituent of dark matter halos. We find that galaxy halos models, consistent with observations of flat rotation curves, are possible for a variety of equations of state with anisotropic ...
Bharadwaj, Somnath, Kar, Sayan
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Polytropic spheres modelling dark matter haloes of dwarf galaxies
Astronomy & Astrophysics, 2021 Context. Dwarf galaxies and their dark matter (DM) haloes have velocity curves of a different character than those in large galaxies. These velocity curves are modelled by a simple pseudo-isothermal model containing only two parameters, which do not give us insight into the physics of the DM halo. Aims.
Jan Novotný +2 more
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Macro Dark Matter Selfgravitating Halos around Galaxies [PDF]
Proceedings of Frontier Research in Astrophysics – II — PoS(FRAPWS2016), 2017 A new family of nonrelativistic, Newtonian non-quantum equilibrium configurations describing galactic halos is introduced taking into account a new possibility to identify particles with masses larger than 1 GeV as components of the dark matter. This possibility may have important implications on the formation of very massive particles during the Big ...
Marco Merafina +1 more
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Halo Properties from Observable Measures of Environment: I. Halo and Subhalo Masses
The Open Journal of Astrophysics, 2023 The stellar mass - halo mass relation provides a strong basis for connecting galaxies to their host dark matter halos in both simulations and observations.
Haley Bowden +2 more
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