Limits on cold dark matter cosmologies from new anisotropy bounds on the cosmic microwave background

Journal Article · Wed May 01 04:00:00 EDT 1991 · Astrophysical Journal; (United States)

DOI:https://doi.org/10.1086/186009· OSTI ID:5392602

Vittorio, N; Meinhold, P; Lubin, P; Muciaccia, P F; Silk, J ^[1]

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1. L'Aquila, Universita (Italy) California, University, Santa Barbara (USA) Roma I, Universita, Rome (Italy) California, University, Berkeley (USA)

A self-consistent method is presented for comparing theoretical predictions of and observational upper limits on CMB anisotropy. New bounds on CDM cosmologies set by the UCSB South Pole experiment on the 1 deg angular scale are presented. An upper limit of 4.0 x 10 to the -5th is placed on the rms differential temperature anisotropy to a 95 percent confidence level and a power of the test beta = 55 percent. A lower limit of about 0.6/b is placed on the density parameter of cold dark matter universes with greater than about 3 percent baryon abundance and a Hubble constant of 50 km/s/Mpc, where b is the bias factor, equal to unity only if light traces mass. 22 refs.

• OSTI ID: 5392602
• Journal Information: Astrophysical Journal; (United States), Journal Name: Astrophysical Journal; (United States) Vol. 372; ISSN ASJOA; ISSN 0004-637X
• Country of Publication: United States
• Language: English

Related Subjects

640106* -- Astrophysics & Cosmology-- Cosmology
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ANISOTROPY
BACKGROUND RADIATION
BARYONS
COMPUTERIZED SIMULATION
COSMOLOGICAL MODELS
COSMOLOGY
ELECTROMAGNETIC RADIATION
ELEMENTARY PARTICLES
FERMIONS
HADRONS
LIMITING VALUES
MATHEMATICAL MODELS
MATTER
MAXIMUM-LIKELIHOOD FIT
MICROWAVE RADIATION
MONTE CARLO METHOD
NONLUMINOUS MATTER
NUMERICAL SOLUTION
POLAR REGIONS
RADIATIONS
RELICT RADIATION
SIMULATION