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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…
Recovery of the Power Spectrum of Mass Fluctuations from Observations of the Lyman-alpha Forest
Rupert A. C. Croft, David H. Weinberg, Neal Katz +1
We present a method to recover the shape and amplitude of the power spectrum of mass fluctuations, P(k), from observations of the high redshift \lya forest. The method is motivated…
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…
The Space Density of Galaxy Peaks and the Linear Matter Power Spectrum
Rupert A. C. Croft, Enrique Gaztanaga
One way of recovering information about the initial conditions of the Universe is by measuring features of the cosmological density field which are preserved during gravitational e…
The richness dependence of galaxy cluster correlations: Results from a redshift survey of rich APM clusters
Rupert A. C. Croft, Gavin B. Dalton, George Efstathiou +2
We analyse the spatial clustering properties of a new catalogue of very rich galaxy clusters selected from the APM Galaxy Survey. These clusters are of comparable richness and spac…