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.
Microwave background anisotropies
Settore FIS/05 - Astronomia e Astrofisica
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2434/704704
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