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The Opacity of the Lyman Alpha Forest and Implications for Omega_{baryon} and the Ionizing Background
M. Rauch, J. Miralda-Escude, W. L. W. Sargent +6
We have measured the distribution function of the flux decrement caused by Lyman alpha forest absorption in a new sample of high resolution QSO spectra. The observations are compar…
Intergalactic Helium Absorption in Cold Dark Matter Models
Rupert A. C. Croft, David H. Weinberg, Neal Katz +1
Observations from the HUT and the HST have recently detected HeII absorption along the lines of sight to two high redshift quasars. We use cosmological simulations with gas dynamic…
Galaxy Structure, Dark Matter, and Galaxy Formation
David H. Weinberg
The structure of galaxies, the nature of dark matter, and the physics of galaxy formation were the interlocking themes of DM 1996: Dark and Visible Matter in Galaxies and Cosmologi…
Voigt-Profile Analysis of the Lyman-alpha Forest in a Cold Dark Matter Universe
Romeel Davé, Lars Hernquist, David Weinberg +1
We use an automated Voigt-profile fitting procedure to extract statistical properties of the Ly forest in a numerical simulation of an , cold dark matter (CDM) universe. Ou…
The Population of Damped Lyman-alpha and Lyman Limit Systems in the Cold Dark Matter Model
Jeffrey P. Gardner, Neal Katz, Lars Hernquist +1
Lyman limit and damped Lyman-alpha absorption systems probe the distribution of collapsed, cold gas at high redshift. Numerical simulations that incorporate gravity and gas dynamic…
Analysis of the Lyman-alpha Forest in Cosmological Simulations Using Voigt-Profile Decomposition
Romeel Davé, Lars Hernquist, David H. Weinberg +1
We use an automated Voigt-profile fitting procedure to extract statistical properties of the Ly forest in a numerical simulation of an , cold dark matter (CDM) universe. Ou…
Photoionization, Numerical Resolution, and Galaxy Formation
David H. Weinberg, Lars Hernquist, Neal Katz
Using cosmological simulations that incorporate gas dynamics and gravitational forces, we investigate the influence of photoionization by a UV radiation background on the formation…