A uniform analysis of the Lyα forest at z = 0-5. I. The sample and distribution of clouds at z > 1.7

Jennifer Scott, Jill Bechtold, Adam Dobrzycki

Research output: Contribution to journalArticle

13 Citations (Scopus)

Abstract

We present moderate-resolution data for 39 quasi-stellar objects (QSOs) at z ≈ 2 obtained at the Multiple Mirror Telescope. These data are combined with spectra of comparable resolution of 60 QSOs with redshifts greater than 1.7 found in the literature to investigate the distribution of Lyα forest lines in redshift and equivalent width. We find a value for γ, the parameter describing the number distribution of Lyα forest lines in redshift, of 1.88 ± 0.22 for lines stronger than a rest equivalent width of 0.32 Å, in good agreement with some previous studies. The Kolmogorov-Smirnov test was applied to the data, and it is found that this single power law is a good fit over the relevant redshift ranges. Simulations of the Lyα forest were performed to determine the completeness of the line lists and to test how well the analysis recovers the underlying line statistics, given this level of completeness.

Original languageEnglish (US)
Pages (from-to)37-66
Number of pages30
JournalAstrophysical Journal, Supplement Series
Volume130
Issue number1
DOIs
StatePublished - Sep 2000

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completeness
Kolmogorov-Smirnov test
lists
power law
statistics
telescopes
mirrors
simulation
distribution
analysis
test
parameter

Keywords

  • Quasars : Absorption lines

ASJC Scopus subject areas

  • Space and Planetary Science

Cite this

A uniform analysis of the Lyα forest at z = 0-5. I. The sample and distribution of clouds at z > 1.7. / Scott, Jennifer; Bechtold, Jill; Dobrzycki, Adam.

In: Astrophysical Journal, Supplement Series, Vol. 130, No. 1, 09.2000, p. 37-66.

Research output: Contribution to journalArticle

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