The N-point correlation functions of the COBE-DMR maps revisited
نویسندگان
چکیده
منابع مشابه
The N-point correlation functions of the COBE-DMR maps revisited
We calculate the two-, threeand (for the first time) four-point correlation functions of the COBE -DMR 4-year sky maps, and search for evidence of non-Gaussianity by comparing the data to Monte Carlo-simulations of the functions. The analysis is performed for the 53 and 90 GHz channels, and five linear combinations thereof. For each map, we simulate an ensemble of 10 000 Gaussian realisations b...
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We extend a previous bispectrum analysis of the COBE-DMR 4 year maps, allowing for the presence of correlations between all possible angular scales. We find that the non-Gaussian signal found earlier for bispectrum components including adjacent modes does not extend to triplets of modes with larger separations. Indeed for all separations ∆l > 1 we find that the COBE-DMR data is very Gaussian. T...
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ژورنال
عنوان ژورنال: Astronomy & Astrophysics
سال: 2002
ISSN: 0004-6361,1432-0746
DOI: 10.1051/0004-6361:20021264