Cosmological constant and Lyα forest statistics

Details Cosmological constant and Lyα forest statistics Cosmological constant and Lyα forest statistics

Oct 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003pobeo..75..189m&link_type=abstract

Publications of the Astronomical Observatory of Belgrade (ISSN 0373-3742), No. 75, p. 189 - 192 (2003). In: Proceedings of the X

Mathematics

Logic

Cosmology

Scientific paper

We investigate the impact of recent discovery of a large positive vacuum energy density ("cosmological constant") on our interpretation of the Lyα forest cloud statistics. It has been known for some time that, contrary to the usual situation in cosmology, the impact of non-zero Λ on the cloud population is larger in the low-redshift limit than in the high-redshift one. We show that this offers a significant circumstantial support to the theory that Lyα clouds are gravitationally confined (in mini-haloes as well as large galactic haloes).

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