Cosmological Limits on the Neutrino Mass from the Lya Forest

Details Cosmological Limits on the Neutrino Mass from the Lya Forest Cosmological Limits on the Neutrino Mass from the Lya Forest

1999-03-23

arxiv.org/abs/astro-ph/9903335v1

Phys.Rev.Lett.83:1092-1095,1999

Astronomy and Astrophysics

Astrophysics

4 pages, 2 ps figures, REVTex, submitted to Phys. Rev. Lett

Scientific paper

10.1103/PhysRevLett.83.1092

The Lya forest in quasar spectra probes scales where massive neutrinos can strongly suppress the growth of mass fluctuations. Using hydrodynamic simulations with massive neutrinos, we successfully test techniques developed to measure the mass power spectrum from the forest. A recent observational measurement in conjunction with a conservative implementation of other cosmological constraints places upper limits on the neutrino mass: m_nu < 5.5 eV for all values of Omega_m, and m_nu < 2.4 (Omega_m/0.17 -1) eV, if 0.2 < Omega_m <0.5 as currently observationally favored (both 95 % C.L.).

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