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Phys. Rev. Lett. 95, 011302 (2005) [4 pages]

Weighing Neutrinos with Galaxy Cluster Surveys

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Sheng Wang1,2, Zoltán Haiman3, Wayne Hu4, Justin Khoury5, and Morgan May1
1Brookhaven National Laboratory, Upton, New York 11973-5000, USA
2Department of Physics, Columbia University, New York, New York 10027, USA
3Department of Astronomy, Columbia University, New York, New York 10027, USA
4Kavli Institute for Cosmological Physics, Department of Astronomy and Astrophysics, Enrico Fermi Institute, University of Chicago, Chicago, Illinois 60637, USA
5Center for Theoretical Physics, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA

Received 28 January 2005; published 30 June 2005

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.

© 2005 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevLett.95.011302
DOI:
10.1103/PhysRevLett.95.011302
PACS:
98.80.Es, 14.60.Pq, 98.65.Cw
 
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