Tests for Gaussianity of the MAXIMA-1 CMB Map

Details Tests for Gaussianity of the MAXIMA-1 CMB Map Tests for Gaussianity of the MAXIMA-1 CMB Map

2001-04-15

arxiv.org/abs/astro-ph/0104248v1

Phys.Rev.Lett. 87 (2001) 251303

Astronomy and Astrophysics

Astrophysics

5 pages, 6 figures, (PRL, in press (2001))

Scientific paper

10.1103/PhysRevLett.87.251303

Gaussianity of the cosmological perturbations in the universe is one of the key predictions of standard inflation, but it is violated by other models of structure formation such as topological defects. We present the first test of the Gaussianity of the cosmic microwave background (CMB) on sub-degree angular scales, where deviations from Gaussianity are most likely to occur. We apply the methods of moments, cumulants, the Kolmogorov test, the $\chi^2$ test, and Minkowski functionals in eigen, real, Wiener-filtered and signal-whitened spaces, to the MAXIMA-1 CMB anisotropy data. We conclude that the data, which probe angular scales between 10 arcminutes and 5 degrees, are consistent with Gaussianity.

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