搜索结果: 1-15 共查到“天体物理学 medium”相关记录19条 . 查询时间(0.156 秒)
The enrichment history of the intracluster medium: a Bayesian approach
Galaxies:clusters:intraclustermedium-X-ray:galaxy clusters Methods:statistical-Galaxies:clusters:general-Cosmology:observation
2012/11/23
This work measures the evolution of the iron content in galaxy clusters by a rigorous analysis of the data of 130 clusters at 0.1difficult by a) the low signal-to-noise ratio...
Intracluster Medium reheating by relativistic jets
Intracluster Medium reheating by relativistic jets
2011/10/18
Galactic jets are powerful energy sources reheating the intra-cluster medium in galaxy clusters. Their crucial role in the cosmic puzzle, motivated by observations, has been established by a great num...
Dust grain growth in the interstellar medium of galaxies at redshifts 4
Dust grain growth interstellar medium galaxies redshifts
2011/10/21
To discriminate between different dust formation processes is a key issue in order to understand its properties. We analysed six submillimeter galaxies at redshifts 4
High energy emission can be produced in the interaction sites of both galactic and extragalactic jets with the surrounding medium. We have developed a radiative model that accounts for the continuous ...
Nonlinear Dynamical Friction of a Circular-Orbit Perturber in a Gaseous Medium
Galaxy Astrophysics (astro-ph.GA)
2010/12/28
We use three-dimensional hydrodynamic simulations to investigate the nonlinear gravitational responses of gas to, and the resulting drag forces on, very massive perturbers moving on circular orbits.
Project Icarus: A Review of Local Interstellar Medium Properties of Relevance for Space Missions to the Nearest Stars
Project Icarus Local Interstellar Medium Properties
2011/1/10
I review those properties of the interstellar medium within 15 light-years of the Sun which will be relevant for the planning of future rapid ($v /ge 0.1c$) interstellar space missions to the nearest ...
The first bent double lobe radio source in a known cluster filament: Constraints on the intra-filament medium
double lobe radio source cluster filament
2011/1/11
We announce the first discovery of a bent double lobe radio source (DLRS) in a known cluster filament. The bent DLRS is found at a distance of 3.4 Mpc from the center of the rich galaxy cluster, Abell...
Anisotropic AGN Outflows and Enrichment of the Intergalactic Medium. II. Metallicity
cosmology — galaxies active — galaxies jets — intergalactic medium — methods
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
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...
Studying the Warm-Hot Intergalactic Medium in Emission
cosmology observations intergalacticmedium large-scale structure of Universe X-rays
2010/11/12
We assess the possibility to detect the warm-hot intergalactic medium (WHIM) in emission and
to characterize its physical conditions and spatial distribution through spatially resolved X-ray spec-tro...
Thin shell morphology in the circumstellar medium of massive binaries
Hydrodynamics – Stars binaries general – Stars circumstellar matter – Stars massive – Stars winds outflows
2010/11/11
Context. In massive binaries, the powerful stellar winds of the two stars collide, leading to the formation of shock-dominated environments that can be modelled only in 3D.
Calibrating Galaxy Redshifts Using Absorption by the Surrounding Intergalactic Medium
galaxies high-redshift intergalactic medium quasars absorption lines
2010/11/11
Rest-frame UV spectral lines of star-forming galaxies are systematically offset fromthe galaxies’systemic redshifts, probably because of large-scale outflows.We calibrate galaxy redshifts measured fro...
Non Thermal Support for the Outer Intracluster Medium
Non Thermal the Outer Intracluster Medium
2011/1/10
We submit that non thermalized support for the outer intracluster medium in relaxed galaxy clusters is provided by turbulence, driven by inflows of intergalactic gas across the virial accretion shocks...
The thermally-unstable warm neutral medium: key for modeling the interstellar medium
Galaxy Astrophysics (astro-ph.GA)
2011/1/6
We present 21-cm absorption measurements towards 12 radio continuum sources with previously identified thermally-unstable warm neutral medium (WNM). These observations were obtained with the Expanded ...
A deep Chandra observation of the poor cluster AWM4 - II. The role of the radio jets in enriching the intra-cluster medium
Cosmology and Extragalactic Astrophysics (astro-ph.CO)
2010/12/23
We use a Chandra observation of the poor cluster AWM4 to map the temperature and abundance of the intra-cluster medium, so as to examine the influence of the central radio galaxy on its environment.