Microwave background anisotropies implied by large-scale galaxy correlations - The minimum of C(0) and cosmological parameters

Abstract

view Abstract Citations (9) References (18) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS Microwave Background Anisotropies Implied by Large-Scale Galaxy Correlations: The Minimum of C(0) and Cosmological Parameters Kashlinsky, A. Abstract We use data from the recently completed APM survey to show that large- scale galaxy correlations found there imply existence of measurable microwave background radiation (MBR) anisotropies on scales greater than several degrees. We show that [C(0)]^1/2^=> 3.5 x 10^5^ if the APM data are used at {THETA}_0_ = 20^deg^, or [C(0)]^1/2^ => 2.8 x 10^5^ if one uses {THETA}_0_ = 10^deg^; these numbers are almost independent of the cosmological parameters {OMEGA},{DELTA} and Z_LS_, the redshift of the last scattering surface. However, for finite-beamwidth experiments the minimal fluctuations depend on the cosmological parameters and are within the reach of the currently planned or conducted experiments. The minimal anisotropies are smaller in a low-R universe. For the experiment with FWHM = 1.5^deg^ now being conducted by P. Lubin and colleagues the minimal anisotropies must be δT/T =>3 x 10^-5^ on scales of 2^deg^- 3^deg^ or greater if {OMEGA} = 1. For other models the minimal anisotropies for such a beam would also be measurable with techniques developed for this experiment, and, hence, the upper limits on, or detection of MBR anisotropies can constrain {OMEGA}, Z_LS_, and {DELTA}. For FWHM = 3.8^deg^, the beam used in the experiment of Meyer and coworkers, δT/T should be detectable with their flux limits if {OMEGA} = 1. For COBE parameters (FWHM = 7^deg^) δT/T => 7 x 10^-6^ if {OMEGA} = 1 and would exceed C0BE's ultimate sensitivity limit for other cosmological parameters. Therefore, the above measurements of MBR anisotropies should set strong constraints on the cosmological parameters as well as find δT/T. Publication: The Astrophysical Journal Pub Date: December 1991 DOI: 10.1086/186226 Bibcode: 1991ApJ...383L...1K Keywords: Galactic Evolution; Relic Radiation; Universe; Anisotropy; Computational Astrophysics; Galactic Clusters; Red Shift; Astrophysics; COSMIC BACKGROUND RADIATION; COSMOLOGY; GALAXIES: CLUSTERING; GALAXIES: FORMATION; GRAVITATION full text sources ADS |