New Constraint on Open Cold-Dark-Matter Models

1998/08/31 by Ali Kinkhabwala, Marc Kamionkowski · 1 citation
Physics and Astronomy · #Black Holes and Theoretical Physics #Cosmology and Gravitation Theories #Dark Matter and Cosmic Phenomena #astro-ph #hep-ph

paper · pdf · doi:10.1103/physrevlett.82.4172

published as Phys.Rev.Lett. 82 (1999) 4172-4175 · 4 pages, LaTeX. Revised version contains additional figure that clarifies new constraint. (To appear in PRL.)

arxiv created 1999/05/03 · openalex publication_date 1999/05/24 · arxiv updated 2009/11/30 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/01

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 \ensuremathΩ₀ and the x-ray bias b_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 \ensuremathΩ₀\ensuremath-b_x parameter space that open-CDM models (and the open-inflation models that produce them) must satisfy.

Citations

• A new inflationary universe scenario: A possible solution of the horizon, flatness, homogeneity, isotropy and primordial monopole problems

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