Astronomy and Astrophysics – Astronomy
Scientific paper
Feb 1990
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990mnras.242..544m&link_type=abstract
Monthly Notices of the Royal Astronomical Society (ISSN 0035-8711), vol. 242, Feb. 15, 1990, p. 544-554. Research supported by S
Astronomy and Astrophysics
Astronomy
80
Caustic Lines, Lyman Alpha Radiation, Quasars, Red Shift, Absorption Spectra, Galactic Evolution, Space Density
Scientific paper
It was shown that redshift caustics are an almost inevitable feature of the hierarchical scenario. These caustics may be the cause of the many sharp absorption features seen toward high redshift quasars: the Ly-alpha forest. It is shown that most of the observed properties of the absorption lines may be accounted for within this model. This is particularly impressive since there are essentially no free parameters in the model. In addition, the data from the double quasar 2345 + 007A, B are analyzed. The results indicate that the 'characteristic' absorber size of 2-12/h kpc, quoted by some authors, is somewhat small. It is known that the characteristic size is not well constrained by the observations but is likely to lie some where in the range 3-250/h kpc.
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