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How Neutral is the Intergalactic Medium at z ~ 6?
Adam Lidz, Lam Hui, Matias Zaldarriaga +1
Recent observations of high redshift quasar spectra reveal long gaps with little flux. A small or no detectable flux does not by itself imply the intergalactic medium (IGM) is neut…
Inferring the Linear Power Spectrum from the Lyman-alpha Forest
Matias Zaldarriaga, Roman Scoccimarro, Lam Hui
We discuss the determination of the linear power spectrum of dark matter fluctuations from measurements of the transmitted flux Ly-alpha Forest power spectrum. We show that at most…
Short Distance Physics and the Consistency Relation for Scalar and Tensor Fluctuations in the Inflationary Universe
Lam Hui, William H. Kinney
Recent discussions suggest the possibility that short distance physics can significantly modify the behavior of quantum fluctuations in the inflationary universe, and alter the sta…
KL Estimation of the Power Spectrum Parameters from the Angular Distribution of Galaxies in Early SDSS Data
SDSS Collaboration, Alexander S. Szalay, Bhuvnesh Jain +25
We present measurements of parameters of the 3-dimensional power spectrum of galaxy clustering from 222 square degrees of early imaging data in the Sloan Digital Sky Survey. The pr…
The Angular Correlation Function of Galaxies from Early SDSS Data
SDSS Collaboration, Andrew Connolly, Ryan Scranton +22
The Sloan Digital Sky Survey is one of the first multicolor photometric and spectroscopic surveys designed to measure the statistical properties of galaxies within the local Univer…
The 3D Power Spectrum from Angular Clustering of Galaxies in Early SDSS Data
Scott Dodelson, Vijay K. Narayanan, Max Tegmark +22
Early photometric data from the Sloan Digital Sky Survey (SDSS) contain angular positions for 1.5 million galaxies. In companion papers, the angular correlation function and…