Estimate of the cosmological bispectrum from the MAXIMA-1 cosmic microwave background map.
Phys Rev Lett
; 88(24): 241302, 2002 Jun 17.
Article
em En
| MEDLINE
| ID: mdl-12059290
ABSTRACT
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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MEDLINE
Idioma:
En
Revista:
Phys Rev Lett
Ano de publicação:
2002
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Article