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 at 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.

Santos, M., Balbi, A., Borrill, J., Ferreira, P., Hanany, S., Jaffe, A., et al. (2002). Estimate of the cosmological bispectrum from the MAXIMA-1 cosmic microwave background map. PHYSICAL REVIEW LETTERS, 88(24) [10.1103/PhysRevLett.88.241302].

Estimate of the cosmological bispectrum from the MAXIMA-1 cosmic microwave background map

BALBI, AMEDEO;
2002-01-01

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 at 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.
2002
Pubblicato
Rilevanza internazionale
Articolo
Sì, ma tipo non specificato
Settore FIS/05 - ASTRONOMIA E ASTROFISICA
English
PRIMORDIAL NON-GAUSSIANITY; POWER SPECTRUM; SKY MAPS; ANISOTROPY
Santos, M., Balbi, A., Borrill, J., Ferreira, P., Hanany, S., Jaffe, A., et al. (2002). Estimate of the cosmological bispectrum from the MAXIMA-1 cosmic microwave background map. PHYSICAL REVIEW LETTERS, 88(24) [10.1103/PhysRevLett.88.241302].
Santos, M; Balbi, A; Borrill, J; Ferreira, P; Hanany, S; Jaffe, A; Lee, At; Magueijo, J; Rabii, B; Richards, Pl; Smoot, Gf; Stompor, R; Winant, C; Wu, J
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2108/53968
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