Matches in SemOpenAlex for { <https://semopenalex.org/work/W2030632017> ?p ?o ?g. }
- W2030632017 endingPage "124010" @default.
- W2030632017 startingPage "124010" @default.
- W2030632017 abstract "Since the first limit on the (local) primordial non-Gaussianity parameter, fNL, was obtained from COBE data in 2002, observations of the CMB have been playing a central role in constraining the amplitudes of various forms of non-Gaussianity in primordial fluctuations. The current 68% limit from the 7-year WMAP data is fNL=32+/-21, and the Planck satellite is expected to reduce the uncertainty by a factor of four in a few years from now. If fNL>>1 is found by Planck with high statistical significance, all single-field models of inflation would be ruled out. Moreover, if the Planck satellite finds fNL=30, then it would be able to test a broad class of multi-field models using the four-point function (trispectrum) test of tauNL>=(6fNL/5)^2. In this article, we review the methods (optimal estimator), results (WMAP 7-year), and challenges (secondary anisotropy, second-order effect, and foreground) of measuring primordial non-Gaussianity from the CMB data, present a science case for the trispectrum, and conclude with future prospects." @default.
- W2030632017 created "2016-06-24" @default.
- W2030632017 creator A5043630302 @default.
- W2030632017 date "2010-05-27" @default.
- W2030632017 modified "2023-10-12" @default.
- W2030632017 title "Hunting for primordial non-Gaussianity in the cosmic microwave background" @default.
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