搜索结果: 1-14 共查到“实测天体物理学 Galaxy”相关记录14条 . 查询时间(0.1 秒)
Dust-Obscured Star-Formation in Intermediate Redshift Galaxy Clusters
Dust-Obscured Star-Formation Intermediate Redshift Galaxy Clusters
2011/1/11
We present Spitzer MIPS 24-micron observations of 16 0.4galaxy clusters drawn from the ESO Distant Cluster Survey (EDisCS). This is the first large 24-micron survey of clusters at intermediate ...
A Compact Early-type Galaxy at z = 0.6 Under a Magnifying Lens: Evidence For Inside-out Growth
galaxies elliptical and lenticular cD
2010/11/10
We use Keck laser guide star adaptive optics imaging and exploit the magnifying effects of strong gravitational lensing (the effective resolution is FWHM 200 pc) to investigate the sub-kpc scale of ...
A Wide Field Survey of Satellite Galaxies around the Spiral Galaxy M106
galaxies；individual (M106) —galaxies；morphology and pho-tometry — galaxies；dwarf galaxies
2010/11/15
We present a wide field survey of satellite galaxies in M106 (NGC 4258)covering a 1.7◦ × 2◦ field around M106 using Canada-France-Hawaii Tele-scope/MegaCam. We find 16 satellite galaxy can...
Measuring the Galaxy Cluster Bulk Flow from WMAP data
Cosmology cosmic microwave background observations diffuse radiation
2010/11/15
We have looked for bulk motions of galaxy clusters in the WMAP 7 year data. We isolate the
kinetic Sunyaev-Zeldovich (SZ) signal by filtering the WMAP Q, V and W band maps with multifrequency matched...
GSH 91.5+2-114: A large HI shell in the outer part of the Galaxy
ISM bubbles — ISM kinematics and dynamics —ISM structure —supernova remnants
2010/11/10
GSH 91.5+ 2− 114 is a large HI shell located in the outer Galaxy at a kinematic distance of about 15 kpc. It was first identified in the Canadian Galactic Plane Survey (CGPS) by Pineault et al.
Have Baryonic Acoustic Oscillations in the galaxy distribution really been measured?
galaxies: statistics cosmology theory large-scale structure
2010/11/15
Recent publications claim that there is no convincing evidence for measurements of the baryonic acoustic (BAO) feature in galaxy samples using either monopole or radial information. Di erent claims se...
Deep CO Observations and the CO-to-H_2 Conversion Factor in DDO 154, a Low Metallicity Dwarf Irregular Galaxy
galaxies ISM — ISM molecules — stars formation
2010/11/16
We present a deep spectroscopic search for CO emission in the dwarf irregular galaxy DDO154, which has an Oxygen abundance of only 1/20 the solar value. The observations were conducted in order to con...
Radio-continuum jets around the peculiar galaxy pair ESO 295-IG022
Galaxies clusters individual Abell S0102 – Galaxies individual
2010/11/10
We report new radio-continuum observations with the Australia Telescope Compact Array (ATCA) of the region surrounding the peculiar galaxy pair ESO295-IG022, at the centre of the poor cluster Abell S0...
Two Epochs of Very Large Array Observations of Water Maser Emission in the active galaxy NGC 6240
galaxies active - galaxies individual (NGC 6240) - galaxies ISM - ISM - galaxies nuclei masers
2010/11/12
Studies of 22GHz H2O maser emission from the merging galaxy NGC 6240 with double nuclei are presented. Two epochs of Very Large Array (VLA) obser-vations in the A-configuration in spectral-line mode w...
Decision Tree Classifiers for Star/Galaxy Separation
Methods data analysis Catalogues Surveys Virtual observatory tools
2010/11/12
We study the star/galaxy classification eciency of 13 di erent decision tree algorithms applied to photometric objects in the Sloan Digital Sky Survey Data Release Seven (SDSS DR7). Each algorithm is...
Hierarchical Stellar Structures in the Local Group Dwarf Galaxy NGC 6822
Galaxy Astrophysics (astro-ph.GA) Cosmology and Extragalactic Astrophysics (astro-ph.CO)
2010/12/28
We present a comprehensive study of the star cluster population and the hierarchical structure in the clustering of blue stars with ages <~ 500 Myr in the Local Group dwarf irregular galaxy NGC 6822. ...
Extreme AGN Feedback and Cool Core Destruction in the X-ray Luminous Galaxy Cluster MACS J1931.8-2634
Cosmology and Extragalactic Astrophysics (astro-ph.CO)
2010/12/23
We report on a deep, multiwavelength study of the galaxy cluster MACS J1931.8-2634 using Chandra X-ray, Subaru optical, and VLA 1.4 GHz radio data. This cluster (z=0.352) harbors one of the most X-ray...
A bias in cosmic shear from galaxy selection: results from ray-tracing simulations
Cosmology and Extragalactic Astrophysics (astro-ph.CO)
2010/12/22
We identify and study a previously unknown systematic effect on cosmic shear measurements, caused by the selection of galaxies used for shape measurement, in particular the rejection of close (blended...
Spectroscopic Confirmation of Three Red-Sequence Selected Galaxy Clusters at z=0.87, 1.16 and 1.21 from the SpARCS Survey
galaxies clusters general galaxies clusters individual
2010/3/9
The Spitzer Adaptation of the Red-sequence Cluster Survey (SpARCS) is a z'-passband imaging survey of the 50 deg^2 Spitzer SWIRE Legacy fields, designed with the primary aim of creating the first larg...