7 papers
Cosmology with the Lyman-alpha Forest
David H. Weinberg, Scott Burles, Rupert A. C. Croft +11
We outline the physical picture of the high-redshift Ly-alpha forest that has emerged from cosmological simulations, describe statistical characteristics of the forest that can be…
Cosmology from the structure of the Lyman-alpha forest
Rupert Croft, David Weinberg, Neal Katz +1
A convincing physical picture for the Lyman-alpha forest has emerged from simulations and related semi-analytic studies of structure formation models. Observations can be be used i…
Hubble Flow Broadening of the Lyman-alpha Forest and its Implications
David H. Weinberg, Lars Hernquist, Neal Katz +2
Lyman-alpha forest lines in QSO spectra have typical widths of 20-50 km/s. Low column density absorbers in cosmological simulations are large, diffuse structures, and the Hubble fl…
Recovery of the mass power spectrum from the Lyman-alpha forest: The effect of ionizing background fluctuations from discrete QSO sources
Rupert Croft
In gravitational instability models, there is a close relationship between most Lyman-alpha absorption and the matter density along the line of sight. Croft et al. (1997) have show…
Characterization of Lyman Alpha Spectra and Predictions of Structure Formation Models: A Flux Statistics Approach
Rupert A. C. Croft, David H. Weinberg, Lars Hernquist +1
In gravitational instability models, \lya absorption arises from a continuous fluctuating medium, so that spectra provide a non-linear one-dimensional ``map'' of the underlying den…
Constraints on the Power Spectrum of Mass Fluctuations from from Galaxy Cluster Peculiar Velocities
Rupert Croft, George Efstathiou
We investigate the feasibility of carrying out likelihood analysis on the velocities of galaxy clusters to determine power spectrum parameters. Using N-body simulations of cosmolog…