Cosmic microwave anisotropies and large-scale velocity fields in isocurvature hot dark matter models

Abstract

view Abstract Citations (15) References (17) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS Cosmic Microwave Anisotropies and Large-Scale Velocity Fields in Isocurvature Hot Dark Matter Models Sugiyama, Naoshi ; Sasaki, Misao ; Tomita, Kenji Abstract We investigate the evolution of isocurvature density perturbations in a universe dominated by hot dark matter (HDM) and evaluate anisotropies in the cosmic microwave background and large-scale peculiar velocity fields. We find isocurvature HDM models are more viable than adiabatic HDM models in that the former can account for relatively large velocity fields on large scales while keeping the cosmic microwave background anisotropies below the observational upper limits as compared to the latter. However, isocurvature HDM models would still have difficulties if the actual velocity fields on scales >~ 50h^-1^ Mpc were confirmed to be substantially greater than ~400 km s^-1^. Publication: The Astrophysical Journal Pub Date: March 1989 DOI: 10.1086/185397 Bibcode: 1989ApJ...338L..45S Keywords: Astronomical Models; Background Radiation; Cosmology; Dark Matter; Microwaves; Perturbation Theory; Universe; Velocity Distribution; Astrophysics; COSMIC BACKGROUND RADIATION; COSMOLOGY; EARLY UNIVERSE full text sources ADS |