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Likelihood Analysis of Galaxy Surveys
Scott Dodelson, Lam Hui, Andrew Jaffe
One of the major goals of cosmological observations is to test theories of structure formation. The most straightforward way to carry out such tests is to compute the likelihood fu…
Constraining the Power Spectrum Using the Column Density Distribution: a Status Report
Lam Hui
We review the arguments for how the slope of the column density distribution of the Lyman-alpha forest should depend on the matter power spectrum. The latest progress, presented by…
The b Distribution and the Velocity Structure of Absorption Peaks in the Lyman-Alpha Forest
Lam Hui, Robert E. Rutledge
A theory is developed which relates the observed b-parameter of a Lyman-alpha absorption line to the velocity-curvature of the corresponding peak in the optical depth fluctuation.…
Probing the Universe with the Lyman-alpha Forest: I. Hydrodynamics of the Low Density IGM
Nickolay Y. Gnedin, Lam Hui
We introduce an efficient and accurate alternative to full hydrodynamic simulations, Hydro-PM (HPM), for the study of the low column density Lyman-alpha forest. It consists of a Pa…
The Column Density Distribution of the Lyman-Alpha Forest: A Measure of Small Scale Power
Lam Hui, Nickolay Y. Gnedin, Yu Zhang
Absorption lines in the Lyman-alpha forest can be thought of as peaks in neutral hydrogen density along lines of sight. The column density distribution (the number density of absor…