Results 31 to 40 of about 2,655,258 (212)
Galaxies, 2018 The cold dark matter (CDM) paradigm successfully explains the cosmic structure over an enormous span of redshifts. However, it fails when probing the innermost regions of dark matter halos and the properties of the Milky Way’s dwarf galaxy satellites ...
Ivan de Martino +5 more
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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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The rise and fall of galaxy activity in dark matter haloes [PDF]
Monthly Notices of the Royal Astronomical Society, 2009 We use a SDSS galaxy group catalogue to study the dependence of galaxy activity on stellar mass, halo mass, and group hierarchy (centrals vs. satellites). We split our galaxy sample in star-forming galaxies, galaxies with optical AGN activity and radio sources.
Pasquali, A +4 more
openaire +3 more sources
A Tilt in the Dark Matter Halo of the Galaxy
The Astrophysical Journal, 2022 Abstract Recent observations of the stellar halo have uncovered the debris of an ancient merger, Gaia–Sausage–Enceladus (GSE), estimated to have occurred ≳8 Gyr ago. Follow-up studies have associated GSE with a large-scale tilt in the stellar halo that links two well-known stellar overdensities in diagonally opposing octants of the ...
Jiwon Jesse Han +11 more
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Constraining the substructure of dark matter haloes with galaxy–galaxy lensing [PDF]
Monthly Notices of the Royal Astronomical Society, 2013 19 pages, 14 figures, accepted by ...
Li, Ran +4 more
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The Astrophysical Journal, 2023 Galaxies show different halo scaling relations such as the radial acceleration relation, the mass discrepancy acceleration relation (MDAR), or the dark matter (DM) surface density relation.
A. Krut +4 more
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GRAVISCALAR DARK MATTER AND SMOOTH GALAXY HALOS [PDF]
Modern Physics Letters A, 2009 In the framework of the unimodular metagravity, with the scalar graviton/graviscalar dark matter, a regular anomalous one-parameter solution to the static spherically symmetric metagravity equations in empty space is found. The solution presents a smooth graviscalar halo, with a finite central density profile, qualitatively reproducing the ...
openaire +3 more sources
Ellipticity of dark matter haloes with galaxy-galaxy weak lensing [PDF]
Monthly Notices of the Royal Astronomical Society, 2006 20 pages, 8 figures, matches MNRAS accepted version (includes updated discussion of systematics, no changes to conclusions)
Mandelbaum, Rachel +4 more
openaire +2 more sources
The Astrophysical Journal, 2023 Baryons both increase halo concentration through adiabatic contraction and expel mass through feedback processes. However, it is not well understood how the radiation fields prevalent during the epoch of reionization affect the evolution of concentration
Hanjue Zhu, Nickolay Y. Gnedin
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Physics Letters B, 2020 We discuss formation of dark matter (DM) mini-halos around primordial black holes (PBHs) and its implication on DM direct detection experiments, including axion searches.
Mark P. Hertzberg +2 more
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