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REVIEW OF COSMOLOGICAL PARAMETERS

    https://doi.org/10.1142/9789812799678_0002Cited by:0 (Source: Crossref)
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    Abstract:

    In this review, the status of measurements of the matter density (Ωm), the vacuum energy density or cosmological constant (ΩΛ), the Hubble constant (H0), and ages of the oldest measured objects (t0) are summarized. Many recent, independent dynamical measurements are yielding a low value for the matter density (Ωm ~ 0.3). New evidence from type Ia supernovae suggests that ΩΛ may be ~0.7. Many recent Hubble constant measurements appear to be converging in the range of 65-75 km/sec/Mpc. Eliminating systematic errors lies at the heart of accurate measurements for all of these parameters.