CMB Neutrino Mass Bounds and Reionization

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 co...

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Bibliographic Details
Published in:Physical Review D
Main Authors: Archidiacono M, Cooray A, Melchiorri A, Pandolfi S
Other Authors: M. Archidiacono, A. Cooray, A. Melchiorri, S. Pandolfi
Format: Article in Journal/Newspaper
Language:English
Published: 2010
Subjects:
Microwave background anisotropies
Settore FIS/05 - Astronomia e Astrofisica
South Pole
South pole
Online Access:http://hdl.handle.net/2434/704704
https://doi.org/10.1103/PhysRevD.82.087302
Description
Summary: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.

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