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

被引：70

作者：

Santos, MG ^{[1
]}

Balbi, A

Borrill, J

Ferreira, PG

Hanany, S

Jaffe, AH

Lee, AT

Magueijo, J

Rabii, B

Richards, PL

Smoot, GF

Stompor, R

Winant, CD

Wu, JHP

机构：

[1] Univ Oxford, Oxford OX1 3RH, England

[2] Univ Calif Berkeley, Dept Astron, Berkeley, CA 94720 USA

[3] Univ Roma Tor Vergata, Dipartimento Fis, I-00133 Rome, Italy

[4] Univ Calif Berkeley, Ctr Particle Astrophys, Berkeley, CA 94720 USA

[5] Univ Calif Berkeley, Lawrence Berkeley Lab, Natl Energy Res Sci Comp Ctr, Berkeley, CA 94720 USA

[6] Univ Minnesota, Sch Phys & Astron, Minneapolis, MN 55455 USA

[7] Univ Calif Berkeley, Space Sci Lab, Berkeley, CA 94720 USA

[8] Univ Calif Berkeley, Dept Phys, Berkeley, CA 94720 USA

[9] Univ London Imperial Coll Sci Technol & Med, London SW7 2BZ, England

来源：

PHYSICAL REVIEW LETTERS | 2002年 / 88卷 / 24期

基金：

美国国家科学基金会;

关键词：

D O I：

10.1103/PhysRevLett.88.241302

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

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.

引用

页码：2413021 / 2413024

页数：4

共 25 条

[1] On the non-Gaussianity observed in the COBE differential microwave radiometer sky maps [J].