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- W2020040401 abstract "We examine stochastic temperature fluctuations of the cosmic background radiation (CBR) arising via the Sachs-Wolfe effect from gravitational wave perturbations produced in the early Universe. These temperature fluctuations are described by an angular correlation function C(ensuremath{gamma}). A new (more concise and general) derivation of C(ensuremath{gamma}) is given, and evaluated for inflationary-universe cosmologies. This yields standard results for angles ensuremath{gamma} greater than a few degrees, but new results for smaller angles, because we do not make standard long-wavelength approximations to the gravitational wave mode functions. The function C(ensuremath{gamma}) may be expanded in a series of Legendre polynomials; we use numerical methods to compare the coefficients of the resulting expansion in our exact calculation with standard (approximate) results. We also report some progress towards finding a closed form expression for C(ensuremath{gamma})." @default.
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- W2020040401 date "1994-09-15" @default.
- W2020040401 modified "2023-09-27" @default.
- W2020040401 title "CBR anisotropy from primordial gravitational waves in inflationary cosmologies" @default.
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- W2020040401 doi "https://doi.org/10.1103/physrevd.50.3713" @default.
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