Results 1 to 10 of about 617 (181)
The Structure of Dark Matter Halos in Dwarf Galaxies [PDF]
The Astrophysical Journal, 1995 Some dwarf galaxies have HI rotation curves that are completely dominated by a surrounding dark matter (DM) halo (e.g. Carignan & Freeman 1988). These objects represent ideal candidates for an investigation of the density structure of low-mass DM halos as the uncertainties resulting from the subtraction of the visible component are small, even in ...
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Dark matter halo properties from galaxy–galaxy lensing★ [PDF]
Monthly Notices of the Royal Astronomical Society, 2013 We present results for a galaxy-galaxy lensing study based on imaging data from the Canada-France-Hawaii Telescope Legacy Survey Wide. From a 12 million object multi-colour catalogue for 124 deg^2 of photometric data in the u*g'r'i'z' filters we compute photometric redshifts (with a scatter of σ_{Δz/(1+z)} = 0.033 and an outlier rate of η=2.0 per cent ...
Brimioulle, F. +4 more
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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
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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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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
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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 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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