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CMB Bispectrum from Active Models of Structure Formation | | Alejandro Gangui
; Levon Pogosian
; Serge Winitzki
; | | Date: |
25 Dec 2000 | | Journal: | Phys.Rev. D64 (2001) 043001 | | Subject: | astro-ph gr-qc hep-ph | | Abstract: | We propose a new method for a numerical computation of the angular bispectrum of the 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: | arXiv, astro-ph/0101453 | | Services: | Forum | Review | PDF | Favorites | |
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