Microwave background anisotropy in low-[Omega][sub 0] inflationary models and the scale of homogeneity in the Universe

Journal Article · Mon Sep 19 04:00:00 EDT 1994 · Physical Review Letters; (United States)

DOI:https://doi.org/10.1103/PhysRevLett.73.1582· OSTI ID:6909913

Kashlinsky, A; Tkachev, I I; Frieman, J ^[1]

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1. Code 685, Goddard Space Flight Center, Greenbelt, Maryland 20771 (United States) NASA/Fermilab Astrophysics Center, Fermi National Accelerator Laboratory, Batavia, Illinois 60510 (United States) Institute for Nuclear Research, Russian Academy of Sciences, Moscow 117312 (Russian Federation) Department of Astronomy Astrophysics, University of Chicago, Chicago, Illinois 60637 (United States)

We study the microwave background anisotropy due to superhorizon-size perturbations in open universes with negative spatial curvature. Using results on the low-order temperature multipole moments from the Cosmic Background Explorer satellite we find that if the homogeneity of the observable Universe arises from an early epoch of inflation, the present density parameter cannot differ from unity by more than the observed quadrupole anisotropy, [vert bar]1[minus][Omega][sub 0][vert bar][approx lt][ital Q][congruent]5[times]10[sup [minus]6], assuming preinflationary density perturbations to be of order unity. With this assumption, inflation models with low [Omega][sub 0] either do not fit the microwave background observations or they do not solve the horizon problem.

• OSTI ID: 6909913
• Journal Information: Physical Review Letters; (United States), Journal Name: Physical Review Letters; (United States) Vol. 73:12; ISSN 0031-9007; ISSN PRLTAO
• Country of Publication: United States
• Language: English

Related Subjects

662110* -- General Theory of Particles & Fields-- Theory of Fields & Strings-- (1992-)
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
ANISOTROPY
COSMIC RADIATION
COSMOLOGICAL MODELS
DENSITY
ELECTROMAGNETIC RADIATION
EXPLORER SATELLITES
INFLATIONARY UNIVERSE
IONIZING RADIATIONS
MATHEMATICAL MODELS
MICROWAVE RADIATION
MULTIPOLES
PERTURBATION THEORY
PHYSICAL PROPERTIES
QUADRUPOLES
RADIATIONS
SATELLITES