Microwave background anisotropy in low omega0 inflationary models and the scale of homogeneity in the universe

Journal Article · Sun May 01 04:00:00 EDT 1994 · Physical Review Letters

DOI:https://doi.org/10.1103/PhysRevLett.73.1582· OSTI ID:1155564

Kashlinsky, A. ^[1]; Tkachev, I. I. ^[2]; Frieman, J. ^[3]

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1. Goddard Space Flight Center, Greenbelt, MD (United States)
2. Russian Academy of Sciences, Moscow (Russian Federation); Fermi National Accelerator Laboratory, Batavia, IL (United States)
3. Univ. of Chicago, Chicago, IL (United States); Fermi National Accelerator Laboratory, Batavia, IL (United States)

We study the microwave background anisotropy due to superhorizon-size perturbations (the Grischuk-Zel'dovich effect) in open universes with negative spatial curvature. Using COBE results on the low-order temperature multipole moments, 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, |1-\Omega_0| \alt Q \simeq 5\times 10^{-6}. Thus, inflation models with low \Omega_0 either do not fit the microwave background observations or they do not solve the horizon problem.

• Research Organization: Fermi National Accelerator Laboratory (FNAL), Batavia, IL
• Sponsoring Organization: USDOE Office of Science (SC), High Energy Physics (HEP) (SC-25)
• DOE Contract Number: AC02-07CH11359
• OSTI ID: 1155564
• Report Number(s): FERMILAB-PUB--94-114-A
• Journal Information: Physical Review Letters, Journal Name: Physical Review Letters Journal Issue: 12 Vol. 73; ISSN 0031-9007; ISSN PRLTAO
• Publisher: American Physical Society (APS)
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
79 ASTRONOMY AND ASTROPHYSICS