The clustering of L-alpha absorption lines in the QSO spectra

Details The clustering of L-alpha absorption lines in the QSO spectra The clustering of L-alpha absorption lines in the QSO spectra

Dec 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987ap%26ss.139..163m&link_type=abstract

Astrophysics and Space Science (ISSN 0004-640X), vol. 139, no. 1, Dec. 1987, p. 163-174.

Astronomy and Astrophysics

Astrophysics

8

Absorption Spectra, Galactic Clusters, Line Spectra, Lyman Alpha Radiation, Metallicity, Quasars

Scientific paper

For nine published high-resolution QSO spectra a correlation analysis of their Lα forest lines has been performed. The two-point correlation functions show some quasi-periodic structure of magnitude |ξ| ⪉ 0.3. Their characteristic separation along the line-of-sight amounts to Δs0 = 3×10-3 or to Δs0 = 5×10-3 for Ω = 1 and 2, respectively. Especially the distribution of nearest neighbouring line positions in two close QSO pairs allows for the interpretation that the absorption clouds lie in sheet-like structures as predicted by the pancake theory. The correlation data contain some hints on metal absorbers within the forest of unidentified lines.

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