8 papers
Running spectral index and mode-mode correlation of inflationary perturbations from off-equilibrium effects
Da-Shin Lee, Li-Zhi Fang, Wolung Lee +1
We study the off-equilibrium effects of inflaton on the dynamics of primordial perturbations in the O(N) model. A self-consistent off-equilibrium formalism is employed to investiga…
Detecting the non-Gaussian Spectrum of QSO's Ly Absorption Line Distribution
Jesus Pando, Li-Zhi Fang
We present an analysis of the non-Gaussianity in the distribution of Ly forest lines in the QSO absorption spectra. Statistical tests performed on this data indicate that there…
Updating the - relationship for galaxy clusters
Xiang-Ping Wu, Li-Zhi Fang, Wen Xu
The relationship between the X-ray determined temperature of the intracluster gas and the optical measured velocity dispersion of the cluster galaxies is often believed to…
Abundance and Clustering of QSOs in Cosmic Structure Formation Models
Hong-Guang Bi, Li-Zhi Fang
Combining the observations of spatial abundance and two-point correlation function of QSOs, we can effectively set constraints on models of cosmic structure formation. Both the abu…
Wavelet Space-Scale Decomposition Analysis of QSO's Lyman-Alpha Lines: Spectrum of non-Gaussianity
Jesus Pando, Li-Zhi Fang
Using a discrete wavelet based space-scale decomposition (SSD), the spectrum of the skewness and kurtosis is developed to describe the non-Gaussian signatures in cosmologically int…
Phase Randomization and Doppler Peaks in the CMB Angular Power Spectrum
Li-Zhi Fang, Zheng Huang, Xian-Ping Wu
Using the Boltzmann equation with a Langevin-like term describing the stochastic force in a baryon-photon plasma, we investigate the influence of the incoherent electron-photon sca…