搜索结果: 1-15 共查到“理论天体物理学 clusters”相关记录19条 . 查询时间(0.156 秒)
Astrophysics and cosmology with galaxy clusters: the WFXT perspective
Astrophysics cosmology galaxy clusters
2011/1/13
We discuss the central role played by the X-ray study of hot baryons within galaxy clusters to reconstruct the assembly of cosmic structures and to trace the past history of star formation and accret...
An optical/NIR survey of globular clusters in early-type galaxies II. Ages of GC systems and the relation to galaxy morphology
globular clusters early-type galaxies II
2011/1/10
Context: Some photometric studies of extragalactic globular cluster (GC) systems using the optical and near-infrared colour combination have suggested the presence of a large fraction of intermediate-...
Mining SDSS in search of Multiple Populations in Globular Clusters
Mining SDSS Multiple Populations Globular Clusters
2011/1/10
Several recent studies have reported the detection of an anomalous color spread along the red giant branch (RGB) of some globular clusters (GC) that appears only when color indices including a near ul...
Strong [O III] and [N II] emission lines in globular clusters from photoionized R Corona Borealis star winds
emission lines globular clusters
2011/1/13
The globular cluster X-ray source CXO J033831.8-352604 in NGC 1399 has recently been found to show strong emission lines of [O III] and [N II] in its optical spectrum in addition to ultraluminous X-ra...
Flying across Galaxy Clusters with Google Earth: additional imagery from SDSS co-added data
Flying across Galaxy Clusters Google Earth SDSS co-added data
2011/1/13
Galaxy clusters are spectacular. We provide a Google Earth compatible imagery for the deep co-added images from the Sloan Digital Sky Survey and make it a tool for examing galaxy clusters. More detail...
Constraining the Redshift Evolution of FIRST Radio Sources in RCS1 Galaxy Clusters
the Redshift Evolution FIRST Radio Sources
2011/1/13
We conduct a statistical analysis of the radio source population in galaxy clusters as a function of redshift by matching radio sources from the Faint Images of the Radio Sky at Twenty-Centimeters (FI...
Massive and Refined. II. The statistical properties of turbulent motions in massive galaxy clusters with high spatial resolution
The statistical properties turbulent motions massive galaxy clusters
2011/1/13
We study the properties of chaotic motions in the intra cluster medium using a set of 20 galaxy clusters simulated with large dynamical range, using the Adaptive Mesh Refinement code ENZO (e.g. Norman...
Statistical comparison of clouds and star clusters
Statistical comparison clouds star clusters
2011/1/13
The extent to which the projected distribution of stars in a cluster is due to a large-scale radial gradient, and the extent to which it is due to fractal sub-structure, can be quantified -- statistic...
Theory of Feedback in Clusters and Molecular Cloud Turbulence
Feedback in Clusters Molecular Cloud Turbulence
2011/1/11
I review recent numerical and analytical work on the feedback from both low- and high-mass cluster stars into their gasoeus environment. The main conclusions are that i) outflow driving appears capabl...
The geometry of the filamentary environment of galaxy clusters
geometry filamentary environment galaxy clusters
2010/11/10
We construct a filament catalogue using an extension of the halo based filament finder
of Zhang et al. (2009), in a 250 Mpc/h side N-body simulation, and study the prop-
erties of filaments ending u...
Non-thermal emission from galaxy clusters
Cosmology large-scale structure – Galaxies clusters general – Radiation mechanisms non-thermal
2010/11/10
The relevance of non-thermal cluster studies and the importance of combining observations of future radio surveys with WFXT data are discussed in this paper.
Chemical abundance ratios of galactic globular clusters from modelling integrated light spectroscopy
galactic globular clusters light spectroscopy
2011/1/10
We use our new, flux-calibrated stellar population model of absorption-line indices to derive ages, metallicities, and various element abundance ratios from integrated light spectroscopy of galactic g...
Galaxy stellar mass functions of different morphological types in clusters, and their evolution between z=0.8 and z=0
Galaxy stellar mass functions morphological types
2011/1/10
We present the galaxy stellar mass function (MF) and its evolution in clusters from z~0.8 to the current epoch, based on the WIde-field Nearby Galaxy-cluster Survey (WINGS) (0.04ESO ...
In Galactic studies a distinction is made between (open) star clusters and associations. For barely resolved objects at a distance of several Mpc this distinction is not trivial to make.
Diffuse light and galaxy interactions in the core of nearby clusters
Cosmology and Extragalactic Astrophysics (astro-ph.CO)
2010/12/28
The kinematics of the diffuse light in the densest regions of the nearby clusters can be unmasked using the planetary nebulae (PNs) as probes of the stellar motions.