Inflation, large-scale structure, and COBE

Conference · Wed Feb 05 00:00:00 EST 1992 · AIP Conference Proceedings (American Institute of Physics); (United States)

OSTI ID:5020350

Frieman, J A ^[1]

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1. NASA/Fermilab Astrophysics Center, Fermi National Accelerator Laboratory, P.O. Box 500, Batavia, Illinois 60510 (United States)

In several versions of the inflationary scenario, such as natural, extended, and power law inflation, the spectrum of density perturbations generated can differ significantly from the scale-invariant (SI) Harrison-Zeldovich form. In these models, the primordial power spectrum is a power law in wavenumber [ital k], [ital P]([ital k])=[vert bar][delta][sub [ital k]][vert bar][sup 2][proportional to][ital k][sup [ital n][sub [ital s]]], with spectral index [ital n][sub [ital s]][le]1, leading to more relative power on large scales than the [ital n][sub [ital s]]=1 SI spectrum. In the context of the cold dark matter (CDM) model, such a tilted' spectrum with [ital n][sub [ital s]][approx lt]0.6--0.7 can help explain the otherwise puzzling large-scale clustering of galaxies. However, the microwave background anisotropies recently detected by COBE severely constrain this possibility: when combined with the requirement that galaxies form sufficiently early, COBE implies that [ital n][sub [ital s]][approx gt]0.6. For extended and power law inflation, which produce a significant gravity wave background, the constraint is even tighter, [ital n][sub [ital s]][approx gt]0.76.

• OSTI ID: 5020350
• Report Number(s): CONF-920837-; CODEN: APCPCS; TRN: 94-006969
• Journal Information: AIP Conference Proceedings (American Institute of Physics); (United States), Vol. 272:2; Conference: ICHEP-26: 26th International Union of Pure and Applied Physics (IUPAP) conference on high energy physics, Dallas, TX (United States), 6-12 Aug 1992; ISSN 0094-243X
• Country of Publication: United States
• Language: English

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71 CLASSICAL AND QUANTUM MECHANICS
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INFLATIONARY UNIVERSE
PHASE TRANSFORMATIONS
ANGULAR CORRELATION
FOURIER TRANSFORMATION
GALAXIES
GRAND UNIFIED THEORY
HUBBLE EFFECT
MICROWAVE SPECTRA
PERTURBATION THEORY
QUANTUM CHROMODYNAMICS
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SPACE VEHICLES
CORRELATIONS
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INTEGRAL TRANSFORMATIONS
MATHEMATICAL MODELS
PARTICLE MODELS
QUANTUM FIELD THEORY
SPECTRA
TRANSFORMATIONS
UNIFIED GAUGE MODELS
UNIFIED-FIELD THEORIES
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