Implications of the Red-Shift-Number Test for Cosmology

作者：Edwin D. Loh · 发表于：Physical Review Letters · 年份：1986 · DOI：10.1103/physrevlett.57.2865 · 被引用次数：25 · 研究领域：Cosmology and Gravitation Theories、Galaxies: Formation, Evolution, Phenomena、Black Holes and Theoretical Physics

This Letter discusses the recent measurement of the number of galaxies versus red shift and flux for cosmological models with a nonzero cosmological constant $\ensuremath{\Lambda}$ and pressureless matter. The main conclusions are these: (1) If space is flat as the inflationary model predicts, then the density parameter $\ensuremath{\Omega}={0.9}_{\ensuremath{-}0.2}^{+0.4}$ and $\frac{\ensuremath{\Lambda}}{(3{H}_{0}^{2})}={0.1}_{\ensuremath{-}0.4}^{+0.2}$. (95%-confidence intervals are used throughout.) (2) For both inflationary and $\ensuremath{\Lambda}=0$ models, the present result and primordial nucleosynthesis are consistent only if a large density of nonbaryonic matter exists. (3) Without any assumptions about $\ensuremath{\Lambda}$, the age of the Universe $t$ and Hubble's constant ${H}_{0}$ are constrained by $0.60<t{H}_{0}<0.88$.