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New constraint on open cold-dark-matter models

Kinkhabwala, Ali and Kamionkowski, Marc (1999) New constraint on open cold-dark-matter models. Physical Review Letters, 82 (21). pp. 4172-4175. ISSN 0031-9007. http://resolver.caltech.edu/CaltechAUTHORS:KINprl99

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Abstract

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 Ω0 and the x-ray bias bx 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 Ω0-bx parameter space that open-CDM models (and the open-inflation models that produce them) must satisfy.


Item Type:Article
Additional Information:©1999 The American Physical Society. Received 28 August 1998; revised 10 February 1999. We thank S. Dodelson, D. Helfand, and D. Spergel for useful comments. A.K. was supported by the Columbia Rabi Scholars Program which is funded by the Kann Rasmussen Foundation. M.K. was supported by a U.S. DOE OJI Award, DE-FG02-92ER40699, NASA Grant No. NAG5-3091, and the Alfred P. Sloan Foundation.
Subject Keywords:COSMIC X-RAY; OPEN UNIVERSE; OPEN INFLATION; COSMOLOGICAL CONSTANT; RADIATION ANISOTROPY; FLUCTUATIONS; PERTURBATIONS; EVOLUTION; OMEGA
Record Number:CaltechAUTHORS:KINprl99
Persistent URL:http://resolver.caltech.edu/CaltechAUTHORS:KINprl99
Alternative URL:http://dx.doi.org/10.1103/PhysRevLett.82.4172
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:5899
Collection:CaltechAUTHORS
Deposited By: Tony Diaz
Deposited On:07 Nov 2006
Last Modified:18 Sep 2014 18:11

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