Results 91 to 100 of about 8,080,766 (192)
Dwarf Cosmology with the Stromlo Missing Satellites Survey
Advances in Astronomy, 2010 The standard Lambda Cold Dark Matter model is considered to be a triumph of theoretical astrophysics but observations of the Milky Way and its system of satellite galaxies irresistibly signal that theory is incomplete on galactic and subgalactic scales ...
Helmut Jerjen
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Effects of Dark Matter Self-interactions on Sagittarius and its Stream
The Astrophysical JournalThis work explores how assumptions regarding the particle-physics nature of dark matter can alter the evolution of the Sagittarius (Sgr) dwarf spheroidal galaxy and its expansive stellar stream.
Connor Hainje +3 more
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Machine Learning the Dark Matter Halo Mass of the Milky Way
Although numerous dynamical techniques have been developed to estimate the total dark matter halo mass of the Milky Way, it remains poorly constrained, with typical systematic uncertainties of 0.3 dex. In this study, we apply a neural network-based approach that achieves high mass precision without several limitations that have affected past approaches;
Hayati, Elaheh +5 more
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Star Stream Velocity Distributions in Cold Dark Matter and Warm Dark Matter Galactic Halos
The Astrophysical JournalThe dark matter subhalos orbiting in a galactic halo perturb the orbits of stars in thin stellar streams. Over time, the random velocities in the streams develop non-Gaussian wings.
Raymond G. Carlberg +3 more
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The Flattened Dark Matter Halos of NGC 4244 and the Milky Way
, 1996 10 pages, including 4 figures. Total 230 kByte. Requires the Sprocl.sty file (can be found at:http://www.wspc.co.uk) To appear in the proceedings of ``Aspects of Dark Matter in Astro- and Particle Physics'', Heidelberg, September 1996 (World Scientific: Eds. H.V. Klapdor-Kleingrothaus, Y. Ramachers)
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Are there MACHOs in the Milky Way halo?
, 2002 Microlensing searches aim to detect compact halo dark matter via its gravitational lensing effect on stars within the Large Magellanic Cloud. These searches have led to the claim that roughly one fifth of the galactic halo dark matter may be in the form ...
A. M. Green +3 more
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The Astrophysical Journal Supplement SeriesSome previous studies have suggested that massive and intermediate-mass primordial black holes (PBHs) could comprise a substantial fraction of dark matter in the Universe.
Przemek Mróz +14 more
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First measurement of the triaxiality of the inner dark matter halo of the Milky Way
Astronomy & AstrophysicsContext. Stellar streams are particularly sensitive probes of the mass distribution of galaxies. Aims. In this work, we focus on the Helmi streams (HS), the remnants of an accreted dwarf galaxy orbiting the inner Milky Way. We examined their peculiar dynamical properties in depth, and used these to provide tight constraints on the Galactic potential ...
Woudenberg, Hanneke C., Helmi, Amina
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The Astrophysical JournalΛCDM cosmology predicts the hierarchical formation of galaxies, which build up mass by merger events and accreting smaller systems. The stellar halo of the Milky Way (MW) has proven to be useful a tool for tracing this accretion history. However, most of
Madeline Lucey +7 more
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There's no place like home? Statistics of Milky Way-mass dark matter halos
, 2009 We present an analysis of the distribution of structural properties for Milky Way-mass halos in the Millennium-II Simulation (MS-II). This simulation of structure formation within the standard LCDM cosmology contains thousands of Milky Way-mass halos and has sufficient resolution to properly resolve many subhalos per host.
Boylan-Kolchin, M. +3 more
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