搜索结果: 1-14 共查到“天文学 haloes”相关记录14条 . 查询时间(0.07 秒)
Feedback from galactic stellar bulges and hot gaseous haloes of galaxies
bulges ISM
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2014/12/23
We demonstrate that the feedback from stellar bulges can, in principle, play an essential role in shaping the halo gas of galaxies with substantial bulge components by conducting 1D hydrodynamical sim...
The dynamics of satellite disruption in cold dark matter haloes
numerical N-body simulation
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2014/12/22
We investigate the physical mechanisms of tidal heating and satellite disruption in cold dark matter host haloes using N-body simulations based on cosmological initial conditions. We show the importan...
Enriched haloes at redshift $z=2$ with no star-formation: Implications for accretion and wind scenarios
galaxies:evolution galaxies:formation galaxies:high-redshifts galaxies
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2011/10/13
In order to understand which process (e.g. galactic winds, cold accretion) is responsible for the cool (T~10^4 K) halo gas around galaxies, we embarked on a program to study the star-formation propert...
Collapse thresholds for the formation of CDM haloes in the ellipsoidal collapse model
cosmology: dark matter – methods: numerical
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2011/10/20
In the excursion set approach to structure formation initially spherical regions of the linear density field collapse if the average density contrast within them exceeds some critical value, \delta_c....
Galaxy clustering in the CFHTLS-Wide: the changing relationship between galaxies and haloes since z ~ 1.2
Cosmology: observations - large-scale structure of Universe - Galaxies: distances and redshifts - Galaxies: evolution - Galaxies: haloes
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2011/9/27
We present a detailed investigation of the changing relationship between galaxies and the dark matter haloes they inhabit from z ~ 1.2 to the present day. We do this by comparing precise galaxy cluste...
Using Dark Matter Haloes to Learn about Cosmic Acceleration: A New Proposal for a Universal Mass Function
Dark Matter Haloes Cosmic Acceleration
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2011/1/11
Structure formation provides a strong test of any cosmic acceleration model because a successful dark energy model must not inhibit {\black or overpredict} the development of observed large-scale stru...
The Peaks Formalism and the Formation of Cold Dark Matter Haloes
gravitation - galaxies haloes - cosmology theory - dark matter – meth-ods numerical
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2010/11/15
We use two cosmological simulations of structure formation to study the condi-tions under which dark matter haloes emerge from the linear density field. Our analysis focuses on matching sites of halo ...
Linking haloes to galaxies: how many halo properties are needed?
galaxies formation
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2010/11/15
Recent studies emphasize that an empirical relation between the stellar mass of galaxies and
the mass of their host dark matter subhaloes can predict the clustering of galaxies and its
evolution wit...
The rates and modes of gas accretion on to galaxies and their gaseous haloes
galaxies evolution – galaxies formation – intergalactic medium – cos-mology theory
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2010/11/15
We study the rate at which gas accretes on to galaxies and haloes and investigate whether the accreted gas was shocked to high temperatures before reaching a galaxy.For this purpose we use a suite of ...
Bound and unbound substructures in Galaxy-scale Dark Matter haloes
Cosmology and Extragalactic Astrophysics (astro-ph.CO)
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2010/12/29
We analyse the coarse-grained phase-space structure of the six Galaxy-scale dark matter haloes of the Aquarius Project using a state-of-the-art 6D substructure finder. Within r_50, we find that about ...
Planetary nebulae with double shells and haloes：insights from hydrodynamical simulations
Planetary nebulae haloes double shells hydrodynamical simulations
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2009/6/11
Planetary nebulae with double shells and haloes：insights from hydrodynamical simulations。
A COMPARSION OF METAL AD LY-&ALPHA：ABSORPTION IN GALACTIC HALOES
galactic astrophysics observational cosmology GALACTIC HALOES
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2009/3/26
The metallicity structure of galactic haloes is one of the major
unknowns in modern galactic astrophysics and observational cosmology. Hereby we
outline a very simple method for obtaining at least a...
DARK MATTER HALOES：AN ADDITIONAL CRITERION FOR THE CHOICE OF FITTING DENSITY PROFILES
cosmology dark matter
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2009/3/5
Simulated dark matter haloes are tted by self-similar, universal
density pro les, where the scaled parameters depend only on a scaled (truncation)
radius, = R=r0, which, in turn, is supposed to b...
A NUMERICAL FIT OF ANALYTICAL TO SIMULATED DENSITY PROFILES IN DARK MATTER HALOES
cosmology theory-dark matter-galaxies clusters galaxies haloes
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2009/2/25
A NUMERICAL FIT OF ANALYTICAL TO SIMULATED DENSITY PROFILES IN DARK MATTER HALOES.