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Cosmological constraints on the neutrino mass from CMB anisotropy and large-scale structure of the Universe |
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| Authors: | A. M. Malinovsky A. A. Voevodkin V. N. Lukash E. V. Mikheeva A. A. Vikhlinin |
| Affiliation: | (1) Astro Space Center, Lebedev Physical Institute, Russian Academy of Sciences, Profsoyuznaya ul. 84/32, Moscow, 117997, Russia;(2) Space Research Institute, Profsoyuznaya ul. 84/32, Moscow, 117997, Russia;(3) Los Alamos National Laboratory, PO Box 1663, Los Alamos, NM 87545, USA;(4) Harvard-Smithsonian Center for Astrophysics, 60 Garden St., Cambridge, MA 02138, USA |
| Abstract: | Using cosmological data on the CMB anisotropy and large-scale structure of the Universe, we have obtained new constraints on the sum of the masses of three generations of active neutrinos: Σm ν < 1.05 eV (95% confidence level). Data of the third year of the WMAP mission served as the source of CMB anisotropy data. The mass functions of X-ray clusters of galaxies were taken as the data on the large-scale structure of the Universe. The observational properties of the clusters were obtained during the ROSAT mission and the assumption that the baryon fraction is universal in the Universe was used to determine the total cluster mass. |
| Keywords: | theoretical and observational cosmology |
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