INVESTIGADORES
GANGUI Alejandro
artículos
Título:
Non-Gaussian Effects in the Cosmic Microwave Background from Inflation
Autor/es:
ALEJANDRO GANGUI
Revista:
PHYSICAL REVIEW D - PARTICLE AND FIELDS
Editorial:
The American Physical Society
Referencias:
Año: 1994 vol. 50 p. 3684 - 3691
ISSN:
1550-7998
Resumen:
The presence of non--Gaussian features in the Cosmic Microwave Background
(CMB) radiation maps represents one of the most long-awaited clues in the
search for the actual structure of the primordial radiation, still needing
confirmation. These features could shed some light on the non trivial task of
distinguishing the real source of the primeval perturbations leading to large
scale structure. One of the simplest non--Gaussian signals to search is the
(dimensionless) skewness ${\cal S}$. Explicit computations for ${\cal S}$ are
presented in the frame of physically motivated inflationary models (natural,
intermediate and polynomial potential inflation) in the hope of finding values
in agreement with estimated quantities from large angle scale (e.g., COBE
DMR) maps. In all the cases considered the non--Gaussian effects turn out to
lie below the level of theoretical uncertainty (cosmic variance). The
possibility of unveiling the signal for ${\cal S}$ with multiple--field models
is also discussed.