Results 21 to 30 of about 612 (190)
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 +4 more
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DARK MATTER HALOS OF BARRED DISK GALAXIES [PDF]
The Astrophysical Journal, 2015 We use a large volume-limited sample of disk galaxies drawn from the Sloan Digital Sky Survey Data Release 7 to study the dependence of the bar fraction on the stellar-to-halo mass ratio, making use of a group catalog, we identify central and satellite galaxies in our sample.
Bernardo Cervantes Sodi +2 more
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Relating the Structure of Dark Matter Halos to Their Assembly and Environment
The Astrophysical Journal, 2020 We use a large N -body simulation to study the relation of the structural properties of dark matter halos to their assembly history and environment. The complexity of individual halo assembly histories can be well described by a small number of principal
Yangyao Chen +6 more
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Dark Matter Halos in Elliptical Galaxies
The Astrophysical Journal, 1993 Values of the M/L B ratio in the inner regions of elliptical (E) galaxies are determined using ionized gas disks as tracers of the triaxial potential. These data, when combined with those provided by the H I disks extending to the outer regions, show that the variation of M/L B with galactocentric radius in Es is similar to that of spirals.
BERTOLA F +3 more
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THE PROLATE DARK MATTER HALO OF THE ANDROMEDA GALAXY [PDF]
The Astrophysical Journal, 2014 Typos corrected. Replaced to match published version.
Hayashi, Kohei, Chiba, Masashi
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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
doaj +1 more source
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 ...
openaire +4 more sources
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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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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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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