The cosmic microwave background temperature bispectrum from scalar perturbations induced by primordial magnetic fields Export

@article{Caprini:2009vk, abstract = {We evaluate the angular bispectrum of the CMB temperature anisotropy at large angular scale due to a stochastic background of primordial magnetic fields. The shape of non-Gaussianity depends on the spectral index of the magnetic field power spectrum and is peaked in the squeezed configuration for a scale-invariant magnetic spectrum. By using the large angular part of the bispectrum generated by magnetic fields, the present bounds on non-Gaussianity set a limit on the amplitude of the primordial magnetic field of the order of 10 nGauss for the scale-invariant case and 20 nGauss for the other spectral indexes.}, archivePrefix = {arXiv}, author = {Caprini, Chiara and Finelli, Fabio and Paoletti, Daniela and Riotto, Antonio}, citeulike-article-id = {4165836}, citeulike-linkout-0 = {http://arxiv.org/abs/0903.1420}, citeulike-linkout-1 = {http://arxiv.org/pdf/0903.1420}, citeulike-linkout-2 = {http://arxiv.org/abs/0903.1420}, day = {8}, eprint = {0903.1420}, eprint = {0903.1420}, keywords = {bispectrum, cmb, constraints, magnetic-fields, non-gaussianity}, month = {Mar}, posted-at = {2009-03-13 11:58:19}, priority = {2}, title = {The cosmic microwave background temperature bispectrum from scalar perturbations induced by primordial magnetic fields}, url = {http://arxiv.org/abs/0903.1420}, year = {2009} }

TY - JOUR ID - Caprini:2009vk L3 - citeulike-article-id:4165836 N2 - We evaluate the angular bispectrum of the CMB temperature anisotropy at large angular scale due to a stochastic background of primordial magnetic fields. The shape of non-Gaussianity depends on the spectral index of the magnetic field power spectrum and is peaked in the squeezed configuration for a scale-invariant magnetic spectrum. By using the large angular part of the bispectrum generated by magnetic fields, the present bounds on non-Gaussianity set a limit on the amplitude of the primordial magnetic field of the order of 10 nGauss for the scale-invariant case and 20 nGauss for the other spectral indexes. TI - The cosmic microwave background temperature bispectrum from scalar perturbations induced by primordial magnetic fields KW - bispectrum KW - cmb KW - constraints KW - magnetic-fields KW - non-gaussianity AU - Caprini, Chiara AU - Finelli, Fabio AU - Paoletti, Daniela AU - Riotto, Antonio PY - 2009/Mar/08/ UR - http://arxiv.org/abs/0903.1420 ER -