搜索结果: 1-13 共查到“星系形成与演化 Formation”相关记录13条 . 查询时间(0.234 秒)
Elemental abundance differences in the 16 Cygni binary system: a signature of gas giant planet formation?
Elemental abundance differences signature planet formation
2011/10/20
The atmospheric parameters of the components of the 16Cygni binary system, in which the secondary has a gas giant planet detected, are measured accurately using high quality observational data. Abunda...
Are Halo and Galaxy Formation Histories Correlated?
cosmology: observations—galaxies:clustering—galaxies: groups: general— galaxies: clusters: general — galaxies: evolution
2011/10/19
The properties of dark matter halos, including mass growth, correlate with larger scale environment at fixed mass, an effect known as assembly bias. However, whether this environmental dependence mani...
The ATLAS3D Project-- VIII: Modelling the Formation and Evolution of Fast and Slow Rotator Early-Type Galaxies within $Λ$CDM
galaxies elliptical and lenticular cD – galaxies formation – galaxies evolution – galaxies structure
2011/10/21
We propose a simple model for the origin of fast and slow rotator early-type galaxies (ETG) within the hierarchical $\Lambda$CDM scenario, that is based on the assumption that the mass fraction of ste...
An HI column density threshold for cold gas formation in the Galaxy
column density threshold cold gas formation Galaxy
2011/9/28
We report the discovery of a threshold in the HI column density of Galactic gas clouds below which the formation of the cold phase of HI is inhibited. This threshold is at $N_{HI} = 2 \times 10^{20}$ ...
A modified star formation law as a solution to open problems in galaxy evolution
galaxies: evolution – galaxies: formation – galaxies: stellar content –galaxies: haloes
2011/10/13
In order to reproduce the low mass end of the stellar mass function, most current models of galaxy evolution invoke very efficient supernova feedback. This solution seems to suffer from several shortc...
Nature, formation and evolution of High Mass X-ray Binaries
Nature formation evolution Mass X-ray Binaries
2011/9/27
The aim of this review is to describe the nature, formation and evolution of the three kinds of high mass X-ray binary (HMXB) population: i. systems hosting Be stars (BeHMXBs), ii. systems accreting t...
AGN Activity and Circumnuclear Star Formation in Nearby Galaxies
Circumnuclear Star Formation Nearby Galaxies
2009/6/18
AGN Activity and Circumnuclear Star Formation in Nearby Galaxies。
Explosions during galaxy formation。
Galactic Halo Formation and the Evolution of Bias
Galactic Halo Formation Evolution of Bias
2009/6/5
Galactic Halo Formation and the Evolution of Bias。
Properties of Disk Galaxies in a Hierarchical Formation Scenario
Galaxies evolution fundamental parameters cosmologyl darak matter
2009/6/4
Properties of Disk Galaxies in a Hierarchical Formation Scenario。
Effects of the Size of Cosmological N-body Simulations on Physical Quantities– II：Halo Formation and Destruction Rate
Large scale structure of Universe N-body simulations galaxies
2009/5/12
In this study we show how errors due to finite box size
affect formation and the destruction rate for haloes in cosmological N-body
simulations. In an earlier study we gave an analytic prescription ...
BROWN DWARF ACCRETION：NONCONVENTIONAL STAR FORMATION OVER VERY LONG TIMESCALES
Stars low-mass,brown dwarfs-Galaxy evolution-ISM general
2009/2/23
We investigate the process of accretion of interstellar gas by the
Galactic population of brown dwarfs over very long timescales typical for physical
eschatology. In particular, we use the classical...