Estimate of the Cosmological Bispectrum from the MAXIMA-1 Cosmic Microwave Background Map

Details Estimate of the Cosmological Bispectrum from the MAXIMA-1 Cosmic Microwave Background Map Estimate of the Cosmological Bispectrum from the MAXIMA-1 Cosmic Microwave Background Map

2001-07-31

arxiv.org/abs/astro-ph/0107588v2

Phys.Rev.Lett. 88 (2002) 241302

Astronomy and Astrophysics

Astrophysics

5 pages, 2 figures. New version to match paper accepted for publication in Phys. Rev. Lett. Non-diagonal terms included leadin

Scientific paper

10.1103/PhysRevLett.88.241302

We use the measurement of the cosmic microwave background taken during the MAXIMA-1 flight to estimate the bispectrum of cosmological perturbations. We propose an estimator for the bispectrum that is appropriate in the flat sky approximation, apply it to the MAXIMA-1 data and evaluate errors using bootstrap methods. We compare the estimated value with what would be expected if the sky signal were Gaussian and find that it is indeed consistent, with a $\chi^2$ per degree of freedom of approximately unity. This measurement places constraints on models of inflation.

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