搜索结果: 1-15 共查到“天文学 intergalactic”相关记录22条 . 查询时间(0.123 秒)
Metal enrichment of the intergalactic medium at z=3 by galactic winds
galactic winds intergalactic medium
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2014/12/26
Studies of quasar absorption lines reveal that the low-density intergalactic medium (IGM) at z ~ 3 is enriched to between 10-3 and 10-2 solar metallicity. This enrichment may have occurred in an early...
Metal enrichment of the intergalactic medium in cosmological simulations
intergalactic medium formation starburst
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2014/12/26
Observations have established that the diffuse intergalactic medium (IGM) at z ~ 3 is enriched to ~10-2.5 solar metallicity and that the hot gas in large clusters of galaxies (ICM) is enriched to - Z ...
Enrichment of the intergalactic medium by radiation pressure-driven dust efflux
intergalactic medium abundances
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2014/12/26
The presence of metals in hot cluster gas and in Lyα absorbers, as well as the mass-metallicity relation of observed galaxies, suggest that galaxies lose a significant fraction of their metals to the ...
X-ray absorption by the low-redshift intergalactic medium: A numerical study of the Lambda cold dark matter model
theory intergalactic medium
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2014/12/24
Using a hydrodynamic simulation of a cold dark matter universe with a cosmological constant, we investigate the "X-ray forest" absorption imprinted on the spectra of background quasars by the interven...
Powerful High-Velocity Dispersion Molecular Hydrogen Associated with an Intergalactic Shock Wave in Stephan's Quintet
interactions intergalactic medium
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2014/12/23
We present the discovery of strong mid-infrared emission lines of molecular hydrogen of apparently high-velocity dispersion (~870 km s-1) originating from a group-wide shock wave in Stephan's Quintet....
X-RAYING THE INTERGALACTIC O VI ABSORBERS
observations intergalactic medium
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2014/12/23
The observed intergalactic O VI absorbers at z>0 have been regarded as a significant reservoir of the "missing baryons." However, to fully understand how these absorbers contribute to the baryon inven...
Intergalactic dust extinction in hydrodynamic cosmological simulations
formation intergalactic medium
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2014/12/22
Recently Ménard et al. (hereafter MSFR) detected a subtle but systematic change in the mean colour of quasars as a function of their projected separation from foreground galaxies, extending to comovin...
The intergalactic medium over the last 10 billion years I: Lyman alpha absorption and physical conditions
intergalactic medium hydrodynamic
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2014/12/20
The intergalactic medium (IGM) is the dominant reservoir of baryons at all cosmic epochs. We investigate the evolution of the IGM from z=2-0 in 48 Mpc/h, 110-million particle cosmological hydrodynamic...
The intergalactic medium unveiled: Caltech's Cosmic Web Imager
The intergalactic medium unveiled Caltech's Cosmic Web Imager
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2014/5/13
Caltech astronomers have taken unprecedented images of the intergalactic medium (IGM)—the diffuse gas that connects galaxies throughout the universe—with the Cosmic Web Imager, an instrument designed ...
The effect of feedback on the emission properties of the Warm-Hot Intergalactic Medium
feedback emission properties the Warm-Hot Intergalactic Medium
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2012/2/21
At present, 30-40 per cent of the baryons in the local Universe is still undetected. According to theoretical predictions, this gas should reside in filaments filling the large-scale structure (LSS) i...
Intergalactic Gas in Groups of Galaxies: Implications for Dwarf Spheroidal Formation and The Missing Baryons Problem
Implications Spheroidal Formation Missing Baryons
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2011/9/28
Radio galaxies with bent jets are predominantly located in groups and clusters of galaxies. We use bent-double radio sources, under the assumption that their jets are bent by ram-pressure, to probe in...
Faraday Rotation Measure due to the Intergalactic Magnetic Field II: the Cosmological Contribution
Intergalactic Magnetic Field II Cosmological Contribution
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2011/9/26
We investigate the Faraday rotation measure (RM) due to the intergalactic magnetic field (IGMF) through the cosmic web up to cosmological distances, using a model IGMF based on turbulence dynamo in th...
Faraday Rotation Measure due to the Intergalactic Magnetic Field II: the Cosmological Contribution
intergalactic medium — large-scale structure of universe —magnetic fields — polarization
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2011/8/24
We investigate the Faraday rotation measure (RM) due to the intergalactic magnetic field (IGMF) through the cosmic web up to cosmological distances, using a model IGMF based on turbulence dynamo in th...
Anisotropic AGN Outflows and Enrichment of the Intergalactic Medium. II. Metallicity
cosmology — galaxies active — galaxies jets — intergalactic medium — methods
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2010/11/15
We investigate the large-scale influence of outflows from AGNs in enriching the IGM with metals in a cosmological context. We combine cosmological simulations of large-scale structure formation with a...
Impact of Primordial Ultracompact Minihaloes on the Intergalactic Medium and First Structure Formation
intergalactic medium dark matter cosmology theory early Universe galaxies structure
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2010/11/12
The effects of dark matter annihilation on the evolution of intergalactic medium(IGM) in the early Universe can be more important if dark matter structure is more concentrated. Ultracompact Minihaloes...