Statistics – Computation
Scientific paper
Oct 1989
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989apj...345...39d&link_type=abstract
Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 345, Oct. 1, 1989, p. 39-51.
Statistics
Computation
25
Computational Astrophysics, Cosmology, Galactic Clusters, Lyman Alpha Radiation, Quasars, Astronomical Spectroscopy, Line Of Sight, Line Spectra, Probability Distribution Functions
Scientific paper
The general issue of using the Ly-alpha absorbers in quasar spectra as tracers of the large-scale matter distribution is discussed, emphasizing complications due to evolutionary effects and line blending. Then, a novel method of statistical analysis of the line data appropriate for studying large-scale structure is described. This method circumvents the problem of line blending by truncating the interval distribution at the low end. It also explicitly takes z-dependent effects into account. As an example, the method is applied to an 18-quasar spectrum sample of 417 lines.
Bajtlik Stanislaw
Duncan Robert C.
Ostriker Jeremiah P.
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