Radiative Transfer Modeling of Lyman Alpha Emitters: I. Statistics of Spectra and Luminosity (2009)
Zheng, Zheng, Cen, Renyue, Trac, Hy, Miralda-Escude, Jordi
We combine a cosmological reionization simulation with box size of 100Mpc/h on a side and a Monte Carlo Lyman-alpha (Lya) radiative transfer code to model Lyman Alpha Emitters (LAEs) at z~5.7. The...
Lyman-alpha Emission From Cosmic Structure I: Fluorescence (2009)
Kollmeier, Juna A., Zheng, Zheng, Davé, Romeel, Gould, Andrew, Katz, Neal, Miralda-Escudé, Jordi, ...
We present predictions for the fluorescent Lyman-alpha emission signature arising from photoionized, optically thick structures in Smoothed Particle Hydrodynamic (SPH) cosmological simulations of a...
Primordial Non-Gaussianity from LAMOST Surveys (2009)
Gong, Yan, Wang, Xin, Zheng, Zheng, Chen, Xuelei
The primordial non-Gaussianity (PNG) in matter density perturbation is a very powerful probe of the physics of the very early Universe. The local PNG can induce a distinct scale-dependent bias on the...
Interpreting the Clustering of Distant Red Galaxies (2009)
Tinker, Jeremy L., Wechsler, Risa H., Zheng, Zheng
We analyze the angular clustering of z~2.3 distant red galaxies (DRGs) measured by Quadri et al 2008. We find that, with robust estimates of the measurement errors and realistic halo occupation...
Wang, Xin, Chen, Xuelei, Zheng, Zheng, Wu, Fengquan, Zhang, Pengjie, Zhao, Yongheng
The Large Area Multi-Object Spectroscopic Telescope (LAMOST) is a dedicated spectroscopic survey telescope being built in China, with an effective aperture of 4 meters and equiped with 4000 fibers....
Halo Occupation Distribution Modeling of Clustering of Luminous Red Galaxies (2008)
Zheng, Zheng, Zehavi, Idit, Eisenstein, Daniel J., Weinberg, David H., Jing, Yipeng
We perform Halo Occupation Distribution (HOD) modeling to interpret small-scale and intermediate-scale clustering of 35,000 luminous early-type galaxies and their cross-correlation with a reference...
Extending Recovery of the Primordial Matter Power Spectrum (2008)
Yoo, Jaiyul, Weinberg, David H., Tinker, Jeremy L., Zheng, Zheng, Warren, Michael S.
The shape of the primordial matter power spectrum Plin(k) encodes critical information on cosmological parameters. At large scales, the observable galaxy power spectrum Pobs(k) is expected to follow...
Hennawi, Joseph F., Prochaska, J. Xavier, Kollmeier, Juna, Zheng, Zheng
We report on the discovery of a bright Lyman alpha blob associated with the z=3 quasar SDSSJ124020.91+145535.6 which is also coincident with strong damped Lyman alpha absorption from a foreground...
Red Galaxy Growth and the Halo Occupation Distribution (2008)
Brown, Michael J. I., Zheng, Zheng, White, Martin, Dey, Arjun, Jannuzi, Buell T., Benson, Andrew J., ...
We have traced the past 7 Gyr of red galaxy stellar mass growth within dark matter halos. We have determined the halo occupation distribution, which describes how galaxies reside within dark matter...
Bai, Y., Pavan, S.N.C., Zheng, Zheng, Zappel, N.F., Reinstadler, A., Lotti, C., ...
The resistant cherry tomato (Solanum lycopersicum var. cerasiforme) line LC-95, derived from an accession collected in Ecuador, harbors a natural allele (ol-2) that confers broad-spectrum and...
Pavan, S.N.C., Zheng, Zheng, Borisova, M., Lotti, C., Giovanni, C. De, ...
The recessive gene ol-2 confers papilla-associated and race-non-specific resistance to tomato powdery mildew caused by Oidium neolycopersici. In order to facilitate marker assisted selection (MAS) in...
Pavan, S.N.C., Zheng, Zheng, Borisova, M., Lotti, C., Giovanni, C. De, ...
The recessive gene ol-2 confers papilla-associated and race-non-specific resistance to tomato powdery mildew caused by Oidium neolycopersici. In order to facilitate marker assisted selection (MAS) in...
Red galaxy growth and the halo occupation distribution (2008)
Brown, Michael J. I., Zheng, Zheng, White, Martin, Dey, Arjun, Jannuzi, Buell T., Benson, Andrew J., ...
We have traced the past 7 Gyr of red galaxy stellar mass growth within dark matter halos. We have determined the halo occupation distribution, which describes how galaxies reside within dark matter...
Environmental Effects on Real-Space and Redshift-Space Galaxy Clustering (2007)
Zu, Ying, Zheng, Zheng, Zhu, G. T., Jing, Y. P.
Galaxy formation inside dark matter halos, as well as the halo formation itself, can be affected by large-scale environments. Evaluating the imprints of environmental effects on galaxy clustering is...
Constraints on radiative dark-matter decay from the cosmic microwave background (2007)
Zhang, Le, Chen, Xuelei, Kamionkowski, Marc, Si, Zong-guo, Zheng, Zheng
If dark matter decays to electromagnetically interacting particles, it can inject energy into the baryonic gas and thus affect the processes of recombination and reionization. This leaves an imprint...
During the epoch of reionization the 21cm signal is sensitive to the scattering rate of the ultraviolet photons, redshifting across the Lyman_alpha resonance. Here we calculate the photon scattering...
Contraints on radiative dark-matter decay from the cosmic microwave background (2007)
Zhang, Le, Chen, Xuelei, Kamionkowski, Marc, Si, Zongguo, Zheng, Zheng
If dark matter decays to electromagnetically-interacting particles, it can inject energy into the baryonic gas and thus affect the processes of recombination and reionization. This leaves an imprint...
Zheng, Zheng, Coil, Alison L., Zehavi, Idit
We model the luminosity-dependent projected two-point correlation function of DEEP2 (z~1) and SDSS (z~0) galaxies within the Halo Occupation Distribution (HOD) framework. At both epochs, there is a...
The Most Massive Black Holes in the Universe: Effects of Mergers in Massive Galaxy Clusters (2007)
Yoo, Jaiyul, Miralda-Escude, Jordi, Weinberg, David H., Zheng, Zheng, Morgan, Christopher W.
Recent observations support the idea that nuclear black holes grew by gas accretion while shining as luminous quasars at high redshift, and they establish a relation of the black hole mass with the...
Evidence for merging or disruption of red galaxies from the evolution of their clustering (2006)
White, Martin, Zheng, Zheng, Brown, Michael J. I., Dey, Arjun, Jannuzi, Buell T.
The formation and evolution of massive red galaxies form a crucial test of theories of galaxy formation based on hierarchical assembly. In this letter we use observations of the clustering of...
Lensing of 21cm Absorption "Halos" of $z\sim$20-30 First Galaxies (2006)
Zhang, Pengjie, Zheng, Zheng, Cen, Renyue
Extended 21cm absorption regions (dubbed ``21cm absorption halos'') around first galaxies at $z\sim 30$ are likely the first distinctive structures accessible to radio observations. Though the radio...
A Comptonization Model for the Prompt Optical and Infrared Emission of GRB 041219A (2006)
Zheng, Zheng, Lu, Ye, Zhao, Yong-Heng
Prompt optical emission from the $\gamma$-ray burst of GRB 041219A has been reported by Vestrand et al. There was a fast rise of optical emission simultaneous with the dominant $\gamma$-ray pulse,...
Deducing the Lifetime of Short Gamma-Ray Burst Progenitors from Host Galaxy Demography (2006)
Zheng, Zheng, Ramirez-Ruiz, Enrico
The frequency of short gamma-ray bursts (GRBs) in galaxies with distinct star formation histories can be used to constrain the lifetime of the progenitor systems. As an illustration, we consider here...
The Dependence of the Occupation of Galaxies on the Halo Formation Time (2006)
Zhu, Guangtun, Zheng, Zheng, Lin, W. P., Jing, Y. P., Kang, Xi, Gao, Liang
We study the dependence of the galaxy contents within halos on the halo formation time using two galaxy formation models, one being a semianalytic model utilizing the halo assembly history from a...
Breaking the Degeneracies Between Cosmology and Galaxy Bias (2005)
Zheng, Zheng, Weinberg, David H.
Adopting the framework of the Halo Occupation Distribution (HOD), we investigate the ability of galaxy clustering measurements to simultaneously constrain cosmological parameters and galaxy bias....
From Galaxy-Galaxy Lensing to Cosmological Parameters (2005)
Yoo, Jaiyul, Tinker, Jeremy L., Weinberg, David H., Zheng, Zheng, Katz, Neal, Davé, Romeel
Galaxy-galaxy lensing measures the mean excess surface density DS(r) around a sample of lensing galaxies. We develop a method for combining DS(r) with the galaxy correlation function xi_gg(r) to...
Eisenstein, Daniel, Zehavi, Idit, Hogg, David, Scoccimarro, Roman, Blanton, Michael, Nichol, Robert, ...
Also archived in: arXiv:astro-ph/0501171 v1 10 Jan 2005
Eisenstein, Daniel, Zehavi, Idit, Hogg, David, Scoccimarro, Roman, Blanton, Michael, Nichol, Robert, ...
Also archived in: arXiv:astro-ph/0501171 v1 10 Jan 2005
Microlensing of Circumstellar Disks (2005)
We investigate the microlensing effects on a source star surrounded by a circumstellar disk, as a function of wavelength. The microlensing light curve of the system encodes the geometry and surface...
Redshift-Space Distortions with the Halo Occupation Distribution I: Numerical Simulations (2005)
Tinker, Jeremy L., Weinberg, David H., Zheng, Zheng
We show how redshift-space distortions of the galaxy correlation function or power spectrum can constrain the matter density parameter Omega_m and the linear matter fluctuation amplitude sigma_8. We...
Eisenstein, Daniel J., Zehavi, Idit, Hogg, David W., Scoccimarro, Roman, Blanton, Michael R., Nichol, Robert C., ...
Abstract not available.
Eisenstein, Daniel J., Zehavi, Idit, Hogg, David W., Scoccimarro, Roman, Blanton, Michael R., Nichol, Robert C., ...
Abstract not available.
Eisenstein, Daniel J., Zehavi, Idit, Hogg, David W., Scoccimarro, Roman, Blanton, Michael R., Nichol, Robert C., ...
Abstract not available.
On the Mass-to-Light Ratio of Large Scale Structure (2004)
Tinker, Jeremy L., Weinberg, David H., Zheng, Zheng, Zehavi, Idit
We examine the dependence of the mass-to-light (M/L) ratio of large-scale structure on cosmological parameters, in models that are constrained to match observations of the projected galaxy...
Zheng, Zheng, Berlind, Andreas A., Weinberg, David H., Benson, Andrew J., Baugh, Carlton M., Cole, Shaun, ...
The halo occupation distribution (HOD) describes the relation between galaxies and dark matter at the level of individual dark matter halos. The properties of galaxies residing at the centers of...
Abazajian, Kevork, Zheng, Zheng, Zehavi, Idit, Weinberg, David H., Frieman, Joshua A., Berlind, Andreas A., ...
We use the projected correlation function w_p(r_p) of a volume-limited subsample of the Sloan Digital Sky Survey (SDSS) main galaxy redshift catalogue to measure the halo occupation distribution...
Projected Three-Point Correlation Functions and Galaxy Bias (2004)
The three-point correlation function (3PCF) can now be measured in large galaxy redshift surveys, but in three dimensions its interpretation is complicated by the presence of redshift-space...
Constraining galaxy bias and cosmology using galaxy clustering data (2004)
Galaxy bias, which is the difference in distributions of galaxies and the underlying dark matter, has long been regarded as an obstacle to deriving cosmological parameters with galaxy clustering data...
On departures from a power law in the galaxy correlation function (2004)
Zehavi, Idit, Weinberg, David H., Zheng, Zheng, Berlind, Andreas A., Frieman, Joshua A., Scoccimarro, Román, ...
M Dwarfs from Hubble Space Telescope Star Counts. V. The I-band Luminosity Function (2003)
Zheng, Zheng, Flynn, Chris, Gould, Andrew, Bahcall, John N., Salim, Samir
We derive the disk I-band luminosity function from the Zheng et al. sample of \~1400 disk M dwarfs observed with the Hubble Space Telescope. We adopt a Galactic-height-dependent color-magnitude...
Interpreting the Observed Clustering of Red Galaxies at z~3 (2003)
Daddi et al. have recently reported strong clustering of a population of red galaxies at z~3 in the Hubble Deep Field-South. Fitting the observed angular clustering with a power law of index -0.8,...
On Departures From a Power Law in the Galaxy Correlation Function (2003)
Zehavi, Idit, Weinberg, David H., Zheng, Zheng, Berlind, Andreas A., Frieman, Joshua A., Scoccimarro, Roman, ...
We measure the projected correlation function w_p(r_p) from the Sloan Digital Sky Survey for a flux-limited sample of 118,000 galaxies and for a volume limited subset of 22,000 galaxies with absolute...
Application of ant colony systems to image texture classification (2003)
Zheng, Hong, Zheng, Zheng, Xiang, Yiang
This paper presents a novel ant system based optimisation method which integrates genetic algorithms and simplex algorithms. This method is able to not only speed up the search process for solutions,...
The application of ant colony systems to image texture classification (2003)
Zheng, Hong, Zheng, Zheng, Xiang, Yiang
This paper presents a novel ant system based optimisation method which integrates genetic algorithms and simplex algorithms. This method is able to not only speed up the search process for solutions,...
Zheng, Zheng, Miralda-Escude, Jordi
A Monte Carlo code to solve the transfer of Lyman alpha (Lya) photons is developed, which can predict the Lya image and two-dimensional Lya spectra of a hydrogen cloud with any given geometry, Lya...
Do Distinct Cosmological Models Predict Degenerate Halo Populations? (2002)
Zheng, Zheng, Tinker, Jeremy L., Weinberg, David H., Berlind, Andreas A.
Using cosmological N-body simulations, we investigate the influence of the matter density parameter Omega_m and the linear theory power spectrum P(k) on statistical properties of the dark matter halo...
Self-shielding Effects on the Column Density Distribution of Damped Lyman Alpha Systems (2002)
Zheng, Zheng, Miralda-Escude, Jordi
We calculate the column density distribution of damped Lyman alpha systems, modeled as spherical isothermal gaseous halos ionized by the external cosmic background. The effects of self-shielding...
The study of head/disk interfacial behavior in PZT glide tests / (2002)
Thesis (M.Sc. (Prec. Eng.))--Nanyang Technological University, School of Mechanical and Production Engineering, 2002.
M Dwarfs from Hubble Space Telescope Star Counts. IV (2001)
Zheng, Zheng, Flynn, Chris, Gould, Andrew, Bahcall, John N., Salim, Samir
We study a sample of about 1400 disk M dwarfs that are found in 148 fields observed with the Wide Field Camera 2 (WFC2) on the Hubble Space Telescope and 162 fields observed with pre-repair Planetary...
Superluminal Caustics of Close, Rapidly-Rotating Binary Microlenses (2000)
The two outer triangular caustics (regions of infinite magnification) of a close binary microlens move much faster than the components of the binary themselves, and can even exceed the speed of...
The progress of high-speed optical communication systems will soon require signal processing capabilities beyond the limit of the electronic devices within the system. An inevitable solution to this...
Is Gamma-ray Absorption by Induced Electric Fields Important in the Pulsar Magnetospheres? (1998)
Zheng, Zheng, Zhang, Bing, Qiao, G. J.
Although the unified formula for gamma-ray absorption process involving both the magnetic field and a perpendicular electric field derived by Daugherty & Lerche (1975) is correct, we argued in this...
Constraining galaxy bias and cosmology using galaxy clustering data
Galaxy bias, which is the difference in distributions of galaxies and the underlying dark matter, has long been regarded as an obstacle to deriving cosmological parameters with galaxy clustering data...