搜索结果: 1-14 共查到“星系与宇宙学 group”相关记录14条 . 查询时间(0.078 秒)
Group Scaling Relations From a Cosmological Hydrodynamic Simulation: No Pre-heating Required?
pre-heating entropy fl oors
2014/12/26
We investigate the X-ray vs. optical scaling relations of poor groups
to small clusters ( 100−700 km/s) identified in a cosmological hydro-
dynamic simulation of a ΛCDM universe, with cooli...
Probing the Local Group Medium toward Markarian 421 with Chandra and the Far Ultraviolet Spectroscopic Explorer
halo intergalactic medium
2014/12/24
We report the detection of highly ionized gas at z ~ 0 seen in resonant UV and X-ray absorption lines toward the z = 0.03 blazar Mrk 421. A total of 13 X-ray and three UV lines were measured (or upper...
We have observed a 3° × 3° area centered on the M81/M82 group of galaxies using the Robert C. Byrd Green Bank Telescope in a search for analogs to the high-velocity clouds of neutral hydrogen found ar...
Powerful H$_2$ Line-cooling in Stephan's Quintet : I - Mapping the Significant Cooling Pathways in Group-wide Shocks,
intergalactic medium shock waves
2014/12/22
We present results from the mid-infrared spectral mapping of Stephan's Quintet using the Spitzer Space Telescope. A 1000 km/s collision has produced a group-wide shock and for the first time the large...
We present high-resolution large-scale observations of the molecular and atomic gas in the Local Group galaxy M 33. The observations were carried out using the HEterodyne Receiver Array (HERA) at the ...
Local Group progenitors: Lyman Alpha bright?
cosmology: theory, galaxies: individual, galaxies: high redshift galaxies:intergalactic medium
2011/10/5
We present a novel approach of identifying the Milky Way (MW) and Andromeda (M31) progenitors that could be visible as LAEs at z~6: we couple a snapshot from the Constrained Local UniversE Simulations...
Starspots on the fastest rotators in the Beta Pic moving group
Stars: rotation Stars: late-typ individual HD 199143, CD− 64◦ 1208 activity starspots
2011/7/28
We carried out high-resolution spectroscopy and BV(I)_C photometric monitoring of the two fastest late-type rotators in the nearby Beta Pictoris moving group, HD199143 (F7V) and CD-641208 (K7V). The m...
Renegade Subhaloes in the Local Group
cosmology: theory – cosmology: dark matter – methods: N-body simulations –galaxies: Local Group – galaxies: Magellanic Clouds
2011/7/14
Using a dark matter only Constrained Local UniversE Simulation (CLUES) we examine the existence of subhaloes that change their affiliation from one of the two prominent hosts in the Local Group (i.e. ...
Enlargement of the Transformation Group of General Relativity: Spherically Symmetric Solutions
Gravity theory, transformation groups Lagrangians fi eld equations stellar model external spherically symmetric solutions
2011/7/14
A theory has been presented previously in which the geometrical structure of a real four-dimensional space time manifold is expressed by a real orthonormal tetrad, and the group of diffeomorphisms is ...
The dark matter assembly of the Local Group in constrained cosmological simulations of a LambdaCDM universe
galaxies: haloes cosmology: theory methods: N-body simulations
2011/6/30
We make detailed theoretical predictions for the assembly properties of the Local Group (LG) in the standard LambdaCDM cosmological model. We use three cosmological N-body dark matter simulations from...
Diagnostic diagrams of H II regions in the Local Group
Diagnostic diagrams H II regions Local Group
2009/6/18
Diagnostic diagrams of H II regions in the Local Group。
Imaging resources for the GTC：the Local Group Census。
The Nature of the Compact Group HCG 54。
Radio Continuum and Far-infrared Emission from the Galaxies in the Eridanus Group
radio continuum radio–FIR correlation galaxies
2009/5/12
The Eridanus galaxies follow the well-known radio–FIR
correlation. The majority (70%) of these galaxies have their star formation
rates below that of the Milky Way. The galaxies that have a signific...