Statistical Power, the Bispectrum and the Search for Non-Gaussianity in the CMB Anisotropy

Details Statistical Power, the Bispectrum and the Search for Non-Gaussianity in the CMB Anisotropy Statistical Power, the Bispectrum and the Search for Non-Gaussianity in the CMB Anisotropy

Dec 2000

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000aas...197.7202p&link_type=abstract

American Astronomical Society, 197th AAS Meeting, #72.02; Bulletin of the American Astronomical Society, Vol. 32, p.1515

Astronomy and Astrophysics

Astronomy

Scientific paper

We use simulated maps of the cosmic microwave background anisotropy to quantify the ability of different statistical tests to discriminate between Gaussian and non-Gaussian models. Despite the central limit theorem on large angular scales, both the genus and extrema correlation are able to discriminate between Gaussian models and a semi-analytic texture model selected as a physically motivated non-Gaussian model. When run on the COBE 4-year CMB maps, both tests prefer the Gaussian model. Although the bispectrum has comparable statistical power when computed on the full sky, once a Galactic cut is imposed on the data the bispectrum loses the ability to discriminate between models. Off-diagonal elements of the bispectrum are comparable to the diagonal elements for the non-Gaussian texture model and must be included to obtain maximum statistical power. This work is supported by NASA ADP Grant 99I0055

Affiliated with

Also associated with

No associations

Rating

Statistical Power, the Bispectrum and the Search for Non-Gaussianity in the CMB Anisotropy does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Statistical Power, the Bispectrum and the Search for Non-Gaussianity in the CMB Anisotropy, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Statistical Power, the Bispectrum and the Search for Non-Gaussianity in the CMB Anisotropy will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1725029