R. Durrer et M. Kunz, COSMIC MICROWAVE BACKGROUND ANISOTROPIES FROM SCALING SEEDS - GENERICPROPERTIES OF THE CORRELATION-FUNCTIONS, Physical review. D. Particles and fields, 57(6), 1998, pp. 3199-3203
In this work we present a partially new method to analyze fluctuations
which are induced by causal scaling seeds. We show that the power spe
ctra due to these kinds of seed perturbations are determined by five a
nalytic functions, which we determine numerically for a special exampl
e. We put forward the view that, even if recent work disfavors the mod
els with cosmic strings and global O(4) texture, causal scaling seed p
erturbations merit a more thorough and general analysis, which we init
iate in this paper.