Cosmic microwave background bispectrum from active models of structure formation

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...

Descripción completa

Guardado en:

Detalles Bibliográficos
Autor principal:	Gangui, Alejandro
Publicado:	2001
Materias:	anisotropy article astronomy calculation methodology model physics signal detection
Acceso en línea:	https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_05562821_v64_n4_p_Gangui http://hdl.handle.net/20.500.12110/paper_05562821_v64_n4_p_Gangui
Aporte de:	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires

id	paper:paper_05562821_v64_n4_p_Gangui
record_format	dspace
spelling	paper:paper_05562821_v64_n4_p_Gangui2023-06-08T15:42:28Z Cosmic microwave background bispectrum from active models of structure formation Gangui, Alejandro anisotropy article astronomy calculation methodology model physics signal detection 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. © 2001 The American Physical Society. Fil:Gangui, A. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. 2001 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_05562821_v64_n4_p_Gangui http://hdl.handle.net/20.500.12110/paper_05562821_v64_n4_p_Gangui
institution	Universidad de Buenos Aires
institution_str	I-28
repository_str	R-134
collection	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic	anisotropy article astronomy calculation methodology model physics signal detection
spellingShingle	anisotropy article astronomy calculation methodology model physics signal detection Gangui, Alejandro Cosmic microwave background bispectrum from active models of structure formation
topic_facet	anisotropy article astronomy calculation methodology model physics signal detection
description	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. © 2001 The American Physical Society.
author	Gangui, Alejandro
author_facet	Gangui, Alejandro
author_sort	Gangui, Alejandro
title	Cosmic microwave background bispectrum from active models of structure formation
title_short	Cosmic microwave background bispectrum from active models of structure formation
title_full	Cosmic microwave background bispectrum from active models of structure formation
title_fullStr	Cosmic microwave background bispectrum from active models of structure formation
title_full_unstemmed	Cosmic microwave background bispectrum from active models of structure formation
title_sort	cosmic microwave background bispectrum from active models of structure formation
publishDate	2001
url	https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_05562821_v64_n4_p_Gangui http://hdl.handle.net/20.500.12110/paper_05562821_v64_n4_p_Gangui
work_keys_str_mv	AT ganguialejandro cosmicmicrowavebackgroundbispectrumfromactivemodelsofstructureformation
_version_	1768543950515208192

Cosmic microwave background bispectrum from active models of structure formation

Ejemplares similares