Quasar Absorption-Line Number Density in a Closed, [Lambda]-Dominated Universe

Quasar Absorption-Line Number Density in a Closed, [Lambda]-Dominated Universe

We investigate the dependence of the line number density in the Lyman α forest on cosmological and evolutionary parameters. Recent data from eight high-redshift quasars obtained with VLT/UVES imply that either there is very strong evolution in the absorber population, or we live in a "nearly fl...

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Veröffentlicht in:Astrophysics and space science 2006-10, Vol.305 (2), p.159
Hauptverfasser: Overduin, J M, Priester, W
Format: Artikel
Sprache:eng
Schlagworte:
Astrophysics
Cosmology
Evolution
Quasars
Universe
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Zusammenfassung:We investigate the dependence of the line number density in the Lyman α forest on cosmological and evolutionary parameters. Recent data from eight high-redshift quasars obtained with VLT/UVES imply that either there is very strong evolution in the absorber population, or we live in a "nearly flat" closed universe which is more heavily vacuum-dominated than standard ΛCDM models.[PUBLICATION ABSTRACT]
ISSN:0004-640X
1572-946X
DOI:10.1007/s10509-006-9053-8