Beyond the small-angle approximation for MBR anisotropy from seeds
- NASA/Fermilab Astrophysics Center, M.S. 209, Fermi National Accelerator Laboratory, P.O. Box 500, Batavia, Illinois 60510 (United States)
- Goddard Space Flight Center, Code 685, Greenbelt, Maryland 20771 (United States)
In this paper we give a general expression for the energy shift of massless particles traveling through the gravitational field of an arbitrary matter distribution as calculated in the weak field limit in an asymptotically flat space-time. It is [ital not] assumed that matter is nonrelativistic. We demonstrate the surprising result that if the matter is illuminated by a uniform brightness background that the brightness pattern observed at a given point in space-time (modulo a term dependent on the observer's velocity) depends only on the matter distribution on the observer's past light cone. These results apply directly to the cosmological MBR anisotropy pattern generated in the immediate vicinity of an object such as a cosmic string or global texture. We apply these results to cosmic strings, finding a correction to previously published results in the small-angle approximation. We also derive the full-sky anisotropy pattern of a collapsing texture knot.
- OSTI ID:
- 6565242
- Journal Information:
- Physical Review, D (Particles Fields); (United States), Vol. 51:4; ISSN 0556-2821
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
BACKGROUND RADIATION
ANISOTROPY
MICROWAVE RADIATION
COSMOLOGY
DISTRIBUTION
ENERGY
GRAVITATIONAL WAVES
LIGHT CONE
MASSLESS PARTICLES
MATTER
SEEDS
SPACE-TIME
STRING MODELS
TEXTURE
COMPOSITE MODELS
ELECTROMAGNETIC RADIATION
ELEMENTARY PARTICLES
EXTENDED PARTICLE MODEL
MATHEMATICAL MODELS
PARTICLE MODELS
QUARK MODEL
RADIATIONS
662110* - General Theory of Particles & Fields- Theory of Fields & Strings- (1992-)