An Infrared Cutoff Revealed by the Two Years of COBE-DMR Observations of Cosmic Temperature Fluctuations

Details An Infrared Cutoff Revealed by the Two Years of COBE-DMR Observations of Cosmic Temperature Fluctuations An Infrared Cutoff Revealed by the Two Years of COBE-DMR Observations of Cosmic Temperature Fluctuations

1994-09-27

arxiv.org/abs/astro-ph/9409072v1

Phys.Rev.Lett. 73 (1994) 1882-1885

Astronomy and Astrophysics

Astrophysics

11 pages, 4 figures (available upon request), Latex, AZPH-TH/94-5, to appera in Phys. Rev. Lett

Scientific paper

10.1103/PhysRevLett.73.1882

We show that a good fitting to the first two years of {\it COBE}-DMR observations of the two-point angular correlation function of CBR temperature is given by models with a non-zero infrared cutoff $k_{min}$ in the spectrum of the primordial density perturbations. If this cutoff comes from the finiteness of the universe, say, a topological T3 model, we find $k_{min} \sim (0.3 - 1.1)\pi$H$_0/c$ with confidence level 95\%. Such a non-zero $k_{min}$ universe would also give a better match to the observations both of the RMS quadrupole anisotropy of CBR and of galaxy clustering.

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