Current cosmic microwave background bounds on the sum of the neutrino masses assume a sudden reionization scenario described by a single parameter that determines the onset of reionization. We investigate the bounds on the neutrino mass in a more general reionization scenario based on a principal component approach. We found the constraint on the sum of the neutrino masses from cosmic microwave background data can be relaxed by similar to 40% in a generalized reionization scenario. Moreover, the amplitude of the rms mass fluctuations sigma(8) is also considerably lower providing a better consistency with the low amplitude of the Sunyaev-Zel'dovich signal recently found by the South Pole Telescope.
CMB Neutrino Mass Bounds and Reionization / M. Archidiacono, A. Cooray, A. Melchiorri, S. Pandolfi. - In: PHYSICAL REVIEW. D. PARTICLES, FIELDS, GRAVITATION, AND COSMOLOGY. - ISSN 1550-2368. - 82:8(2010), pp. 087302.1-087302.4. [10.1103/PhysRevD.82.087302]
CMB Neutrino Mass Bounds and Reionization
M. Archidiacono;
2010
Abstract
Current cosmic microwave background bounds on the sum of the neutrino masses assume a sudden reionization scenario described by a single parameter that determines the onset of reionization. We investigate the bounds on the neutrino mass in a more general reionization scenario based on a principal component approach. We found the constraint on the sum of the neutrino masses from cosmic microwave background data can be relaxed by similar to 40% in a generalized reionization scenario. Moreover, the amplitude of the rms mass fluctuations sigma(8) is also considerably lower providing a better consistency with the low amplitude of the Sunyaev-Zel'dovich signal recently found by the South Pole Telescope.File | Dimensione | Formato | |
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