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26 papers · 2 filters
Large-Scale Structure of the Universe and Cosmological Perturbation Theory
F. Bernardeau, S. Colombi, E. Gaztanaga +1
We review the formalism and applications of non-linear perturbation theory (PT) to understanding the large-scale structure of the Universe. We first discuss the dynamics of gravita…
Strong Relativistic Collisionless Shock
Andrei Gruzinov
A direct numerical simulation of a strong relativistic collisionless shock propagating into an unmagnetized medium has been performed in two spatial dimensions. It is found that: (…
Higher Order Moments of the Angular Distribution of Galaxies from Early SDSS Data
István Szapudi, Joshua A. Frieman, Roman Scoccimarro +13
We present initial results for counts in cells statistics of the angular distribution of galaxies in early data from the Sloan Digital Sky Survey (SDSS). We analyze a rectangular s…
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…
Heating and Ionization of X-Winds
H. Shang, A. E. Glassgold, F. H. Shu +1
In order to compare the x-wind with observations, one needs to be able to calculate its thermal and ionization properties. We formulate the physical basis for the streamline-by-str…