Journal Article

Large-scale structure in the Lyman-α forest: a new technique

J. Liske, J. K. Webb and R. F. Carswell

in Monthly Notices of the Royal Astronomical Society

Published on behalf of The Royal Astronomical Society

Volume 301, issue 3, pages 787-796
Published in print December 1998 | ISSN: 0035-8711
Published online December 1998 | e-ISSN: 1365-2966 | DOI:
Large-scale structure in the Lyman-α forest: a new technique

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We present a new technique for detecting structure on Mpc scales in the Lyα forest. The technique is easy to apply in practice since it does not involve absorption-line fitting, but rather is based on the statistics of the transmitted flux. It identifies and assesses the statistical significance of regions of overdense or underdense Lyα absorption and is fairly insensitive to the quality of the data. Using extensive simulations, we demonstrate that the new method is significantly more sensitive to the detection of large-scale structure in the Lyα forest than a traditional two-point correlation function analysis of fitted absorption lines.

Keywords: quasars: absorption lines; large-scale structure of Universe

Journal Article.  0 words. 

Subjects: Astronomy and Astrophysics

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