搜索结果: 1-10 共查到“相对论天体物理学 Galaxy”相关记录10条 . 查询时间(0.074 秒)
Redshift-Space Enhancement of Line-of-Sight Baryon Acoustic Oscillations in the SDSS Main-Galaxy Sample
cosmology large-scale structure of Universe - methods data analysis
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2010/11/15
We show that redshift-space distortions of galaxy correlations have a strong e ect on correlation functions with distinct, localized features, like the signature of the Baryon Acoustic Oscillations (B...
Galaxy metallicity near and far
Galaxy metallicity
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2010/11/9
Metallicity appears to be one the most important tool to study the formation and evolution of galaxies. Recently, we have shown that metallicity of local galaxies is tightly related not only to stella...
Star formation trends in high-redshift galaxy surveys: the elephant or the tail?
high-redshift galaxy elephan tail
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2010/11/15
Star formation rate and accummulated stellar mass are two fundamental physical quantities that describe the evolutionary state of a forming galaxy. Two recent at-tempts to determine the relationship b...
Star Formation in the XMMU J2235.3-2557 Galaxy Cluster at z=1.39
Cosmology and Extragalactic Astrophysics (astro-ph.CO)
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2010/12/27
We present the first results of a narrow-band photometric study of the massive galaxy cluster XMMU J2235.3-2557 at z=1.39. We obtained deep $H$ narrow-band imaging with NIRI on Gemini North, correspon...
AGN Driven Weather and Multiphase Gas in the Core of the NGC 5044 Galaxy Group
Cosmology and Extragalactic Astrophysics (astro-ph.CO)
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2010/12/23
A deep Chandra observation of the X-ray bright group, NGC 5044, shows that the central region of this group has been strongly perturbed by repeated AGN outbursts. These recent AGN outbursts have produ...
Contamination of the Central Sunyaev--Zel'dovich Decrements in AMiBA Galaxy Cluster Observations
Cosmology and Extragalactic Astrophysics (astro-ph.CO)
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2010/12/23
We investigate the contamination of the Sunyaev--Zel'dovich (SZ) effect for six galaxy clusters, A1689, A1995, A2142, A2163, A2261, and A2390, observed by the Y. T. Lee Array for Microwave Background ...
An X-ray Selected Galaxy Cluster in the Lockman Hole at Redshift 1.753
Cosmology and Extragalactic Astrophysics (astro-ph.CO)
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2010/12/24
We have discovered an X-ray selected galaxy cluster with a spectroscopic redshift of 1.753. The redshift is of the brightest cluster galaxy (BCG), which is coincident with the peak of the X-ray surfac...
Deconvolution of window effect in galaxy power spectrum analysis
Cosmology and Extragalactic Astrophysics (astro-ph.CO)
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2010/12/23
We develop a new method for deconvolving the smearing effect of the survey window in the analysis of the galaxy multipole power spectra from a redshift survey. This method is based on the deconvolutio...
Galaxy Clusters Selected with the Sunyaev-Zel'dovich Effect from 2008 South Pole Telescope Observations
galaxies clusters individual cosmology observations
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2010/3/9
We present a detection-significance-limited catalog of 21 Sunyaev-Zel'dovich selected galaxy clusters. These clusters, along with 1 unconfirmed candidate, were identified in 178 deg^2 of sky surveyed ...
Photometric Redshift Biases from Galaxy Evolution
Data Analysis and Techniques Galaxies
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2010/3/8
Proposed cosmological surveys will make use of photometric redshifts of galaxies that are significantly fainter than any complete spectroscopic redshift surveys that exist to train the photo-z methods...