Work

Cosmic microwave background bispectrum from active models of structure formation

Year: 2001

Type: article

Abstract: We propose a method for a numerical computation of the angular bispectrum of the cosmic microwave background (CMB) anisotropies arising from active models such as cosmic topological defects, using a modified Boltzmann code based on CMBFAST. The method does not use CMB sky maps and requires moderate computational power. As a first implementation, we apply our method to a recently proposed model of simulated cosmic strings and estimate the observability of the non-Gaussian bispectrum signal. A comparison with the cosmic variance of the bispectrum estimator shows that the bispectrum for the simulated string model we used is not observable.

Source: Physical review. D. Particles, fields, gravitation, and cosmology/Physical review. D. Particles and fields

DOI: 10.1103/physrevd.64.043001

Authors: Alejandro Gangui, Levon Pogosian, Serge Winitzki

Institutions: Universidad de Buenos Aires, Institute of Astronomy and Space Physics, Case Western Reserve University

Language: English

Topic: Cosmology and Gravitation Theories

Subfield: Astronomy and Astrophysics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: bronze

Funder: Consejo Nacional de Investigaciones Científicas y Técnicas

OpenAlex ID: W1876602347

FWCI: 2.647

Cites: 33

Cited by: 33

Related to: 10