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Weighing Neutrinos with Galaxy Cluster Surveys

Sheng Wang·Zoltan Haiman·Wayne Hu·Justin Khoury·Morgan May
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Abstract

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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Sheng Wang, Zoltan Haiman, Wayne Hu, Justin Khoury, Morgan May. 2005-05-19. Weighing Neutrinos with Galaxy Cluster Surveys. https://doi.org/10.1103/physrevlett.95.011302

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