Small-angle anisotropies in the CMBR from active sources

Details Small-angle anisotropies in the CMBR from active sources Small-angle anisotropies in the CMBR from active sources

1996-10-24

arxiv.org/abs/astro-ph/9610197v1

Phys.Rev. D55 (1997) 7361-7367

Astronomy and Astrophysics

Astrophysics

12 pages, 5 figures, also available at http://euclid.tp.ph.ic.ac.uk

Scientific paper

10.1103/PhysRevD.55.7361

We consider the effects of photon diffusion on the small-angle microwave background anisotropies due to active source models. We find that fluctuations created just before the time of last scattering allow anisotropy to be created on scales much smaller than allowed by standard Silk damping. Using simple models for string and texture structure functions as examples, we illustrate the differences in the angular power spectrum at scales of order a few arcminutes. In particular, we find that the Doppler peak heights are modified by 10-50% and the small-angle fall-off is power law rather than exponential.

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