New Constraint on Open Cold-Dark-Matter Models

Journal Article · Sat May 01 04:00:00 EDT 1999 · Physical Review Letters

DOI:https://doi.org/10.1103/PhysRevLett.82.4172· OSTI ID:341419

Kinkhabwala, A; Kamionkowski, M ^[1]

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1. Department of Physics, Columbia University, 538 West 120th Street, New York, New York 10027 (United States)

We calculate the large-angle cross correlation between the cosmic-microwave-background temperature and the x-ray-background intensity expected in an open universe with cold dark matter (CDM) and a nearly scale-invariant spectrum of adiabatic density perturbations. Results are presented as a function of the nonrelativistic-matter density {Omega}{sub 0} and the x-ray bias b{sub x} for both an open universe and a flat cosmological-constant universe. Recent experimental upper limits to the amplitude of this cross correlation provide a new constraint to the {Omega}{sub 0}-b{sub x} parameter space that open-CDM models (and the open-inflation models that produce them) must satisfy. {copyright} {ital 1999} {ital The American Physical Society}

• Research Organization: Columbia University
• DOE Contract Number: FG02-92ER40699
• OSTI ID: 341419
• Journal Information: Physical Review Letters, Journal Name: Physical Review Letters Journal Issue: 21 Vol. 82; ISSN 0031-9007; ISSN PRLTAO
• Country of Publication: United States
• Language: English

Related Subjects

66 PHYSICS
BACKGROUND RADIATION
COSMIC RADIATION
COSMIC X-RAY SOURCES
COSMOLOGY
DENSITY
MICROWAVE RADIATION
NONLUMINOUS MATTER