Quasar absorption lines with a nonzero cosmological constant

Details Quasar absorption lines with a nonzero cosmological constant Quasar absorption lines with a nonzero cosmological constant

Apr 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992apj...389..478t&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 389, April 20, 1992, p. 478-490.

Mathematics

Logic

8

Cosmic Dust, Cosmology, Intergalactic Media, Interstellar Extinction, Quasars, Red Shift, Absorption Spectra, Compton Effect, Hubble Space Telescope, Line Spectra, Lyman Alpha Radiation

Scientific paper

Quasar absorption lines in flat universes with nonzero cosmological constant Lambda are examined and compared with more conventional zero Lambda universes. Various evolution effects for intergalactic absorbers and the observed number density evolution of each absorption system are examined in order to discriminate between evolution effects and the cosmological models. An interesting interaction between Lambda effects and cosmic absorption phenomena is explored. Equations describing IGM absorption statistics are developed for nonzero Lambda cosmologies, both for unevolving absorber populations and some of the more popular physical models for the IGM and intergalactic clouds which include the effects of the absorber evolution.

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