209 citations · 1.1k across the 21 of their papers we have counts for
12 papers · 1 filter
Log-Poisson Hierarchical Clustering of Cosmic Neutral Hydrogen and Ly-alpha Transmitted Flux of QSO Absorption Spectrum
Yi Lu, Yao-Quan Chu, Li-Zhi Fang
we study, in this paper, the non-Gaussian features of the mass density field of neutral hydrogen fluid and the Ly-alpha transmitted flux of QSO absorption spectrum from the point-o…
The clustering of SDSS galaxy groups: mass and color dependence
Yu Wang, Xiaohu Yang, H. J. Mo +3
We use a sample of galaxy groups selected from the SDSS DR 4 with an adaptive halo-based group finder to probe how the clustering strength of groups depends on their masses and col…
The Three-point Correlation Function of Galaxies: Comparing Halo Occupation Models with Observations
Yu Wang, Xiaohu Yang, H. J. Mo +2
We present models for the three-point correlation function (3PCF) of both dark matter and galaxies. We show that models based on the halo model can reasonably match the dark matter…
Spatial Locality of Galaxy Correlation Function in Phase Space: Samples from the 2MASS Extended Source Catalog
Yicheng Guo, Yao-Quan Chu, Li-Zhi Fang
We analyze the statistical properties and dynamical implications of galaxy distributions in phase space for samples selected from the 2MASS Extended Source Catalog. The galaxy dist…
Populating Dark Matter Haloes with Galaxies: Comparing the 2dFGRS with Mock Galaxy Redshift Surveys
Xiaohu Yang, H. J. Mo, Y. P. Jing +2
In two recent papers, we developed a powerful technique to link the distribution of galaxies to that of dark matter haloes by considering halo occupation numbers as function of gal…
Understanding the Results of Galaxy-Galaxy Lensing using Galaxy-Mass Correlation in Numerical Simulations
XiaoHu Yang, H. J. Mo, Guinevere Kauffmann +1
McKay et al. (2002) have recently used measurements of weak galaxy-galaxy lensing in the Sloan Digital Sky Survey to estimate the cross correlation between galaxies and the project…
Measuring the galaxy power spectrum with multiresolution decomposition -- IV. redshift distortion
Xiao-Hu Yang, Long-Long Feng, Yao-Quan Chu +1
In this paper, we develop a theory of redshift distortion of the galaxy power spectrum in the discrete wavelet transform (DWT) representation. Because the DWT power spectrum is dep…
Measuring the galaxy power spectrum with multiresolution decomposition -- III. velocity field analysis
Xiao-Hu Yang, Long-Long Feng, Yao-Quan Chu +1
In this paper, we develop the method of analyzing the velocity field of cosmic matter with a multiresolution decomposition. This is necessary in calculating the redshift distortion…
Measuring the galaxy power spectrum with multiresolution decomposition -- II. diagonal and off-diagonal power spectra of the LCRS galaxies
Xiao-Hu Yang, Long-Long Feng, Yao-Quan Chu +1
The power spectrum estimator based on the discrete wavelet transform (DWT) for 3-dimensional samples has been studied. The DWT estimator for multi-dimensional samples provides two…
X-ray Emitting QSOs Ejected from Arp 220
H. C. Arp, E. M. Burbidge, Y. Chu
Four compact ROSAT X-ray sources very close to the nearby ultraluminous infrared galaxy Arp 220 (IC 4553) have been identified as medium-redshift QSOs. The closest pair lying symme…
Quasars around the Seyfert Galaxy NGC3516
Y. Chu, J. Wei, J. Hu +2
We report redshift measurements of 5 X-ray emitting blue stellar objects (BSO's) located less than 12 arc min from the X-ray Seyfert galaxy, NGC 3516. We find these quasars to be d…
Deep Wide-Field Spectrophotometry of the Open Cluster M67
Xiaohui Fan, David Burstein, Jian-sheng Chen +21
We present nine color CCD intermediate-band spectrophotometry of a two square degree field centered on the old open cluster M67, from 3890 to nearly 1. These observations…