PECULIAR VELOCITIES AND MICROWAVE BACKGROUND ANISOTROPIES FROM COSMICSTRINGS

Using an analytic model, we show that the predictions of the cosmic st ring model for the peculiar velocities and the microwave background (M BR) anisotropy depend on similar combinations of string evolution para meters. 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 agreeme nt with observations on small scales but is inconsistent with observat ions on large scales (> 50 h-1 Mpc). The cosmic Mach number obtained f rom the cosmic string scenario is found to depend on a single network evolution parameter and is consistent with observations on scales 5 h- 1 Mpc to 20 h-1 Mpc.