Modelling the spatial distribution of QSO absorption lines

Details Modelling the spatial distribution of QSO absorption lines Modelling the spatial distribution of QSO absorption lines

Jan 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991mnras.248..177b&link_type=abstract

Monthly Notices of the Royal Astronomical Society (ISSN 0035-8711), vol. 248, Jan. 15, 1991, p. 177-192.

Statistics

Computation

13

Absorption Spectra, Astronomical Models, Line Spectra, Quasars, Spatial Distribution, Computational Astrophysics, Lyman Alpha Radiation

Scientific paper

A formalism has been developed for testing specific models for the three-dimensional spatial distributions of Ly-alpha clouds against the line-of-sight observations. The formalism can be used to compute the redshift density of lines and the distribution of line-interval sizes along a line-of-sight for comparison with the observations. A few simple models are considered: a Poisson distribution of Ly-alpha clouds, clouds arising from density fluctuations with a white-noise power spectrum, clouds distributed only on shells of constant comoving radii, clouds restricted to shells that are expanding in a self-similar fashion, and a Poisson distribution of clouds in the 'walls' between small-scale voids.

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