Results 21 to 30 of about 233 (117)
ANGULAR MOMENTUM ACQUISITION IN GALAXY HALOS [PDF]
The Astrophysical Journal, 2013 We use high-resolution cosmological hydrodynamic simulations to study the angular momentum acquisition of gaseous halos around Milky-Way-sized galaxies. We find that cold mode accreted gas enters a galaxy halo with ~70% more specific angular momentum than dark matter averaged over cosmic time (though with a very large dispersion). In fact, we find that
Stewart Kyle R. +6 more
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The Red Halos of Galaxies [PDF]
Proceedings of the International Astronomical Union, 2006 AbstractOptical and near-IR surface photometry of the halos of disk galaxies and blue compact galaxies have revealed a very red spectral energy distribution, which cannot easily be reconciled with any normal type of stellar population. Using spectral evolutionary models, we demonstrate that a stellar population with an extremely bottom-heavy initial ...
Erik Zackrisson +4 more
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Annual Review of Astronomy and Astrophysics, 2012 Galactic halo gas traces inflowing star-formation fuel and feedback from a galaxy's disk and is therefore crucial to our understanding of galaxy evolution. In this review, we summarize the multiwavelength observational properties and origin models of Galactic and low-redshift spiral galaxy halo gas. Galactic halos contain multiphase gas flows that are
Putman, M. E. +2 more
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The stellar halo of the Galaxy [PDF]
Astronomy and Astrophysics Review, 2008 Stellar halos may hold some of the best preserved fossils of the formation history of galaxies. They are a natural product of the merging processes that probably take place during the assembly of a galaxy, and hence may well be the most ubiquitous component of galaxies, independently of their Hubble type.
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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 +4 more
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The Sizes of Galaxy Halos in Galaxy Cluster Abell 1689 [PDF]
The Astrophysical Journal, 2007 12 pages, 4 figures.
Halkola, A., Seitz, S., Pannella, M.
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The galaxy–dark matter halo connection: which galaxy properties are correlated with the host halo mass? [PDF]
Monthly Notices of the Royal Astronomical Society, 2015 16 pages, 12 figures.
Contreras, S. +3 more
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Monthly Notices of the Royal Astronomical Society, 2023 ABSTRACT Approximate methods to populate dark-matter haloes with galaxies are of great utility to galaxy surveys. However, the limitations of simple halo occupation models (HODs) preclude a full use of small-scale galaxy clustering data and call for more sophisticated models.
Hadzhiyska, Boryana +13 more
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Astrophysics and Space Science, 2004 Invited review given at the JENAM 2002 in Porto, Workshop ISM, eds. M.A. de Avillez & D. Breitschwerdt, Kluwer, 10 pages, 8 figures.
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Luminosity Bias: From Haloes to Galaxies [PDF]
Publications of the Astronomical Society of Australia, 2013 AbstractLarge surveys of the local Universe have shown that galaxies with different intrinsic properties such as colour, luminosity and morphological type display a range of clustering amplitudes. Galaxies are therefore not faithful tracers of the underlying matter distribution.
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