Astrophysics and Space Science

, Volume 139, Issue 1, pp 163–174 | Cite as

The clustering of Lα absorption lines in the QSO spectra

  • J. P. Mücket
  • V. Müller


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 0.2, 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.


Correlation Analysis Correlation Function Absorption Line Correlation Data Line Position 
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Copyright information

© D. Reidel Publishing Company 1987

Authors and Affiliations

  • J. P. Mücket
    • 1
  • V. Müller
    • 1
  1. 1.Zentralinstitut für Astrophysik der Akademie der Wissenschaften der DDRPotsdamG.D.R.

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