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Abstract:

Measuring the three-point correlators of the cosmic microwave background (CMB) anisotropies could help to get a handle on the level of non-Gaussianity present in the observational data sets and therefore would strongly constrain models of the early Universe. However, typically, the expected non-Gaussian signal is very small. Therefore, one has to face the problem of extracting it from the noise, in particular from the “cosmic variance” noise. For this purpose, one has to construct the best unbiased estimators for the three-point correlators that are needed for concrete detection of non-Gaussian features. In this article, we study this problem for both the CMB third moment and the CMB angular bispectrum. We emphasize that knowledge of the best estimator for the former does not permit one to infer the best estimator for the latter and vice versa. We present the corresponding best unbiased estimators in both cases and compute their corresponding cosmic variances. © 2000 The American Physical Society.

Registro:

Documento: Artículo
Título:Best unbiased estimators for the three-point correlators of the cosmic microwave background radiation
Autor:Gangui, A.
Filiación:Instituto de Astronomía y Física del Espacio, Ciudad Universitaria, Buenos Aires, 1428, Argentina
DARC, Observatoire de Paris-Meudon UMR 8629 CNRS, Meudon Cedex, 92195, France
Año:2000
Volumen:62
Número:10
Página de inicio:17
DOI: http://dx.doi.org/10.1103/PhysRevD.62.103004
Título revista:Physical Review D - Particles, Fields, Gravitation and Cosmology
Título revista abreviado:Phys Rev D Part Fields Gravit Cosmol
ISSN:15507998
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_15507998_v62_n10_p17_Gangui

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Citas:

---------- APA ----------
(2000) . Best unbiased estimators for the three-point correlators of the cosmic microwave background radiation. Physical Review D - Particles, Fields, Gravitation and Cosmology, 62(10), 17.
http://dx.doi.org/10.1103/PhysRevD.62.103004
---------- CHICAGO ----------
Gangui, A. "Best unbiased estimators for the three-point correlators of the cosmic microwave background radiation" . Physical Review D - Particles, Fields, Gravitation and Cosmology 62, no. 10 (2000) : 17.
http://dx.doi.org/10.1103/PhysRevD.62.103004
---------- MLA ----------
Gangui, A. "Best unbiased estimators for the three-point correlators of the cosmic microwave background radiation" . Physical Review D - Particles, Fields, Gravitation and Cosmology, vol. 62, no. 10, 2000, pp. 17.
http://dx.doi.org/10.1103/PhysRevD.62.103004
---------- VANCOUVER ----------
Gangui, A. Best unbiased estimators for the three-point correlators of the cosmic microwave background radiation. Phys Rev D Part Fields Gravit Cosmol. 2000;62(10):17.
http://dx.doi.org/10.1103/PhysRevD.62.103004