QSO absorption lines - Minimal clustering models

Details QSO absorption lines - Minimal clustering models QSO absorption lines - Minimal clustering models

Feb 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990mnras.242..678l&link_type=abstract

Monthly Notices of the Royal Astronomical Society (ISSN 0035-8711), vol. 242, Feb. 15, 1990, p. 678-684.

Astronomy and Astrophysics

Astronomy

8

Absorption Spectra, Distribution Functions, Galactic Clusters, Line Spectra, Quasars, Astronomical Models, Poisson Equation, Red Shift

Scientific paper

The two-point correlation function of line positions is a relatively weak sensor of QSO absorption line clustering. The distribution of redshift intervals between successive lines is more efficient, particularly when the line sample is small. A model simulating the current observations of QSO absorption line systems is presented. In this model, the clouds are grouped into cloud aggregates that are randomly distributed along the line-of-sight with a mean velocity separation of 600 km/s at z of about 3. The velocity dispersion within a cloud aggregate is on the same order. The older low-resolution observations detect on average less than one cloud per aggregate, while the higher resolution observations are detecting over three clouds per aggregate.

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