Weighing Neutrinos with Galaxy Cluster Surveys

Details Weighing Neutrinos with Galaxy Cluster Surveys Weighing Neutrinos with Galaxy Cluster Surveys

2005-05-19

arxiv.org/abs/astro-ph/0505390v1

Phys.Rev.Lett.95:011302,2005

Astronomy and Astrophysics

Astrophysics

4 pages, 1 figure, version accepted for publication in PRL

Scientific paper

10.1103/PhysRevLett.95.011302

Large future galaxy cluster surveys, combined with cosmic microwave background observations, can achieve a high sensitivity to the masses of cosmologically important neutrinos. We show that a weak lensing selected sample of ~100,000 clusters could tighten the current upper bound on the sum of masses of neutrino species by an order of magnitude, to a level of 0.03 eV. Since this statistical sensitivity is below the best existing lower limit on the mass of at least one neutrino species, a future detection is likely, provided that systematic errors can be controlled to a similar level.

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