INVESTIGADORES
MOLLERACH Maria Silvia
artículos
Título:
Contribution to the Three-Point Function of the Cosmic Microwave Background from the Rees-Sciama Effect
Autor/es:
S. MOLLERACH; A. GANGUI; F. LUCCHIN; S. MATARRESE,
Revista:
ASTROPHYSICAL JOURNAL
Editorial:
IOP PUBLISHING LTD
Referencias:
Año: 1995 vol. 453 p. 1 - 5
ISSN:
0004-637X
Resumen:
We compute the contribution to the three-point temperature correlation
function of the cosmic microwave background coming from the nonlinear
evolution of Gaussian initial perturbations, as described by the
Rees-Sciama (or integrated Sachs-Wolfe) effect. By expressing the
collapsed three-point function in terms of multipole amplitudes, we
are able to calculate its expectation value for any power spectrum and
for any experimental setting on large angular scales. We also give an
analytical expression for the rms collapsed three-point function
arising from the cosmic variance of a Gaussian fluctuation field. In
the case of COBE DMR, we find that the predicted signal is 3
orders of magnitude below that expected from the cosmic variance.