搜索结果: 1-14 共查到“天体物理学 Dwarf galaxies”相关记录14条 . 查询时间(0.243 秒)
The central slope of dark matter cores in dwarf galaxies: Simulations vs. THINGS
Galaxies dark matter halos – galaxies cosmological N-body+SPH simulations –galaxies kinematics and dynamics
2010/11/15
We make a direct comparison of the derived dark matter (DM) distributions between hydrody-
namical simulations of dwarf galaxies assuming a CDM cosmology and the observed dwarf galaxies sample from ...
Dark and luminous matter in THINGS dwarf galaxies
Galaxies dark matter – galaxies kinematics and dynamics – galaxies
2010/11/10
We present mass models for the dark matter component of seven dwarf galaxies taken from “The
Hi Nearby Galaxy Survey” (THINGS) and compare these with those from numerical Cold Dark
Matter (CDM) s...
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+2 galaxies in the Coma
supercluster (z = 0.023). We show...
Dwarf galaxies in the nearby Lynx-Cancer void: photometry, colours and ages
Dwarf galaxies photometry colours ages
2010/11/16
The nearby Lynx-Cancer void is a good laboratory to study the effect of very rarefied environment on the evolution of the least massive dwarf galaxies. A recently compiled sample of this void’s galaxi...
Dynamical versus Stellar Masses of Ultracompact Dwarf Galaxies in the Fornax Cluster
galaxies dwarf – galaxies elliptical and lenticular cD – galaxies evo-lution – galaxies stellar content – galaxies kinematics and dynamics
2010/11/12
The origin of ultracompact dwarf (UCD) galaxies, compact extragalactic stellar sys-tems, is still a puzzle for present galaxy formation models. We present the compre-hensive analysis of high resolutio...
Faint dwarf galaxies in the Next Generation Virgo cluster Survey
Cosmology and Extragalactic Astrophysics (astro-ph.CO)
2011/1/6
The Next Generation Virgo Cluster Survey (NGVS) is a CFHT Large Program that is using the wide field of view capabilities of the MegaCam camera to map the entire Virgo Cluster from its core to virial ...
Faint dwarf galaxies in nearby clusters
Cosmology and Extragalactic Astrophysics (astro-ph.CO)
2011/1/5
Besides giant elliptical galaxies, a number of low-mass stellar systems inhabit the cores of galaxy clusters, such as dwarf elliptical galaxies (dEs/dSphs), ultra-compact dwarf galaxies (UCDs), and gl...
A census of ultra-compact dwarf galaxies in nearby galaxy clusters
Cosmology and Extragalactic Astrophysics (astro-ph.CO)
2011/1/5
Ultra-compact dwarf galaxies (UCDs) are predominatly found in the cores of nearby galaxy clusters. Besides the Fornax and Virgo cluster, UCDs have also been confirmed in the twice as distant Hydra I a...
We develop a technique to investigate the possibility that some of the recently discovered ultra-faint dwarf satellites of the Milky Way might be cusp caustics rather than gravitationally self-bound s...
ISM enrichment and local pollution in dwarf galaxies
Cosmology and Extragalactic Astrophysics (astro-ph.CO) Galaxy Astrophysics (astro-ph.GA)
2010/12/28
The fate of metals after they are released in starburst episodes is still unclear. What phases of the interstellar medium are involved, in which timescales?
The evolution of stellar structures in dwarf galaxies
Cosmology and Extragalactic Astrophysics (astro-ph.CO)
2010/12/28
We present a study of the variation of spatial structure of stellar populations within dwarf galaxies as a function of the population age. We use deep Hubble Space Telescope/Advanced Camera for Survey...
Groups of dwarf galaxies in the Local supercluster
Cosmology and Extragalactic Astrophysics (astro-ph.CO
2010/12/27
We present a project on study of groups composed of dwarf galaxies only. We selected such structures using HyperLEDA and NED databases with visual inspection on SDSS images and on digital copy of POSS...
How do dwarf galaxies acquire their mass & when do they form their stars?
Cosmology and Extragalactic Astrophysics (astro-ph.CO)
2010/12/27
We apply a simple, one-equation, galaxy formation model on top of the halos and subhalos of a high-resolution dark matter cosmological simulation to study how dwarf galaxies acquire their mass and, fo...
Nuclei of early-type dwarf galaxies: are they progenitors of UCDs?
Cosmology and Extragalactic Astrophysics (astro-ph.CO)
2010/12/24
To address the question of whether the so-called ultra compact dwarf galaxies (UCDs) are the remnant nuclei of destroyed early-type dwarf galaxies (dEs), we analyze the stellar population parameters o...