Gravitational angular fluctuations of the cosmic background radiation produced by cosmological linear perturbations

Journal Article · Fri Dec 15 00:00:00 EST 1989 · Physical Review, D (Particles Fields); (USA)

DOI:https://doi.org/10.1103/PhysRevD.40.3821· OSTI ID:7166561

Tomita, K ^[1]

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1. Research Institute for Theoretical Physics, Hiroshima University, Takehara, Hiroshima 725, Japan (JP)

The gravitational angular fluctuations of light rays produced by linear density perturbations are investigated in the Einstein--de Sitter model. It is found that, owing to the random-walk process aroused by the perturbations, the mean-square angular fluctuations of individual light rays and the mean-square relative angular fluctuations of two neighboring rays increase as they propagate. Their behavior is shown in cases when the index {ital n} of the initial spectrum of density perturbations is equal to 1, 0, and {minus}1.

• OSTI ID: 7166561
• Journal Information: Physical Review, D (Particles Fields); (USA), Vol. 40:12; ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
BACKGROUND RADIATION
DISTURBANCES
ANGULAR DISTRIBUTION
COSMIC RADIATION
COSMOLOGICAL MODELS
DECOUPLING
GEODESICS
GRAVITATIONAL FIELDS
SPACE-TIME
UNIVERSE
VISIBLE RADIATION
DISTRIBUTION
ELECTROMAGNETIC RADIATION
IONIZING RADIATIONS
MATHEMATICAL MODELS
RADIATIONS
640101* - Astrophysics & Cosmology- Cosmic Radiation