Peculiar Velocities and Microwave Background Anisotropopies from Cosmic Strings

Details Peculiar Velocities and Microwave Background Anisotropopies from Cosmic Strings Peculiar Velocities and Microwave Background Anisotropopies from Cosmic Strings

1993-03-11

arxiv.org/abs/hep-ph/9303242v2

Astrophys.J. 423 (1994) L77-L80

Physics

High Energy Physics

High Energy Physics - Phenomenology

(revised version) 13 pages plus 1 figure available upon request. CfA preprint No. 3290

Scientific paper

10.1086/187240

Using an analytic model we show that the predictions of the cosmic string model for the peculiar velocities and the microwave background (MBR) anisotropy depend on similar combinations of string evolution parameters. Normalizing from the COBE detection of MBR anisotropy, and for certain reasonable values of string network evolution parameters, we find that the magnitude of predicted velocity flows is in good agreement with observations on small scales but is inconsistent with observations on large scales ($ > 50 h^{-1}$Mpc). The Cosmic Mach Number obtained from the cosmic string scenario is found to depend on a single network evolution parameter and is consistent with observations on scales $5h^{-1}$Mpc to $20h^{-1}$Mpc.

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