Cosmic strings and the microwave sky. I - Anisotropy from moving strings

Details Cosmic strings and the microwave sky. I - Anisotropy from moving strings Cosmic strings and the microwave sky. I - Anisotropy from moving strings

Apr 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988apj...327..584s&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 327, April 15, 1988, p. 584-614. NASA-DOE-supported research.

Statistics

Computation

81

Anisotropic Media, Background Radiation, Cosmic Rays, Galactic Clusters, Gravitational Fields, String Theory, Computational Astrophysics, Star Formation, Statistical Analysis, Temperature Dependence, Temperature Gradients

Scientific paper

A method is developed for calculating the component of the microwave anisotropy around cosmic string loops due to their rapidly changing gravitational fields. The method is only valid for impact parameters from the string much smaller than the horizon size at the time the photon passes the string. The method makes it possible to calculate the temperature pattern around arbitrary string configurations numerically in terms of one-dimensional integrals. This method is applied to temperature jump across a string, confirming and extending previous work. It is also applied to cusps and kinks on strings, and to determining the temperature pattern far from a strong loop. The temperature pattern around a few loop configurations is explicitly calculated. Comparisons with the work of Brandenberger et al. (1986) indicates that they have overestimated the MBR anisotropy from gravitational radiation emitted from loops.

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