搜索结果: 1-15 共查到“理论天体物理学 Evolution”相关记录20条 . 查询时间(0.107 秒)
In this paper we derive, directly from the Nambu-Goto action, the relevant components of the acceleration of cosmological featureless $p$-branes, extending previous analysis based on the field theory ...
Assessing the redshift evolution of massive black holes and their hosts
quasars: general { galaxies: evolution { galaxies: formation { black hole physics
2011/9/30
Motivated by recent observational results that focus on high redshift black holes, we explore the effect of scatter and observational biases on the ability to recover the intrinsic properties of the b...
An expanded merger-tree description of cluster evolution
expanded merger-tree description cluster evolution
2011/1/11
We model the formation and evolution of galaxy clusters in the framework of an extended dark matter halo merger-tree algorithm that includes baryons and incorporates basic physical considerations. Our...
The Evolution of the Large-scale ISM: Bubbles, Superbubbles and Non-Equilibrium Ionization
the Large-scale ISM Bubbles Superbubbles
2011/1/11
The ISM, powered by SNe, is turbulent and permeated by a magnetic field (with a mean and a turbulent component). It constitutes a frothy medium that is mostly out of equilibrium and is ram pressure do...
On the redshift-evolution of the Lyman-alpha escape fraction and the dust content of galaxies
the redshift-evolution the Lyman-alpha escape fraction
2011/1/10
The Ly-alpha emission line has been proven a powerful tool by which to study evolving galaxies at the highest redshifts. However, in order to use Lya as a physical probe of galaxies, it becomes vital ...
Thermal evolution and lifetime of intrinsic magnetic fields of Super Earths in habitable zones
Thermal evolution intrinsic magnetic fields
2011/1/11
We have numerically studied the thermal evolution of various-mass terrestrial planets in habitable zones, focusing on duration of dynamo activity to generate their intrinsic magnetic fields, which may...
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...
The evolution of the large-scale emission in FRI jets
galaxies jets–hydrodynamics–galaxies evolution–X-rays galaxies–gamma-rays galaxies–radio continuum galaxies
2010/11/11
Recent observations in X-rays and gamma-rays of nearby FRI radio galaxies have raised the question of the origin of the emission detected in the termination structures of their jets. The study of thes...
The evolution of dwarf galaxies in the Coma supercluster
galaxies clusters general galaxies clusters individual Coma galaxies dwarf
2010/11/10
We employ spectroscopic and photometric data from SDSS DR7, in a 500 square degree
region, to understand the evolution of dwarf (M+2in the Coma
supercluster (z = 0.023). We show...
The robustness of the galaxy distribution function to effects of merging and evolution
galaxies statistics cosmology theory large-scale structure of universe
2010/11/9
We examine the evolution of the spatial counts-in-cells distribution of galaxies and
show that the form of the galaxy distribution function does not change significantly as
galaxies merge and evolve...
The Last Eight-Billion Years of Intergalactic SiIV Evolution
intergalactic medium – quasars absorption lines techniques spectroscopic intergalactic medium quasars absorption lines techniques spectroscopic
2010/11/10
We identified 24 Si IV absorption systems with z . 1 from a blind survey of 49 low-redshift
quasars with archival Hubble Space Telescope ultraviolet spectra. We relied solely on the char-
acteristic...
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) (0.04e ESO ...
Evolution of gaseous disk viscosity driven by supernova explosion. II. Structure and emissions from star-forming galaxies at high redshift
gaseous disk viscosity driven supernova explosion
2011/1/10
(Abridged) High redshift galaxies are undergoing intensive evolution of dynamical structure and morphologies. We incorporate the feedback into the dynamical equations through mass dropout and angular ...
The Early Evolution of Primordial Pair-Instability Supernovae
Primordial Pair-Instability Supernovae
2011/1/10
The observational signatures of the first cosmic explosions and their chemical imprint on second-generation stars both crucially depend on how heavy elements mix within the star at the earliest stages...
Review about populations of Be stars: stellar evolution of extreme stars
Solar and Stellar Astrophysics (astro-ph.SR)
2011/1/6
Among the emission-line stars, the classical Be stars known for their extreme properties are remarkable. The Be stars are B-type main sequence stars that have displayed at least once in their life emi...