搜索结果: 1-15 共查到“理学 dwarf galaxies”相关记录29条 . 查询时间(0.125 秒)
Dwarf galaxies are enigmas wrapped in riddles. Although they are the smallest galaxies, they represent some of the biggest mysteries about our universe. While many dwarf galaxies surround our own Milk...
Using dark matter halos traced by galaxy groups selected from the Sloan Digital Sky Survey Data Release 4, we find that about 1/4 of the faint galaxies (0.1 Mr – 5log h> – 17.05, hereafter dwarfs) tha...
COMPARISON OF H alpha AND UV STAR FORMATION RATES IN THE LOCAL VOLUME: SYSTEMATIC DISCREPANCIES FOR DWARF GALAXIES
evolution dwarf
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2014/12/23
Using a complete sample of ~300 star-forming galaxies within 11 Mpc of the Milky Way, we evaluate the consistency between star formation rates (SFRs) inferred from the far ultraviolet (FUV) non-ionizi...
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...
Extreme Emission Line Galaxies in CANDELS: Broad-Band Selected, Star-Bursting Dwarf Galaxies at z>1
Extreme Emission Galaxies CANDELS: Broad-Band Selected Star-Bursting Dwarf Galaxies
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2011/10/17
We identify an abundant population of extreme emission line galaxies (EELGs) at redshift z~1.7 in the Cosmic Assembly Near-IR Deep Extragalactic Legacy Survey (CANDELS) imaging from Hubble Space Teles...
The Cold Gas Content of Bulgeless Dwarf Galaxies
galaxies: dwarf– galaxies: evolution – galaxies: formation – methods:N-body simulations
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2011/10/9
We present an analysis of the neutral hydrogen (HI) properties of a fully cosmological hydrodynamical dwarf galaxy, run with varying simulation parameters. As reported by Governato et al. (2010), the ...
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
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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
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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
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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
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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
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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)
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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)
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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)
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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...