Cosmological limits on the neutrino mass from the Ly ± forest

Rupert A.C. Croft; Wayne Hu; Romeel Davé

doi:10.1103/PhysRevLett.83.1092

Cosmological limits on the neutrino mass from the Ly ± forest

Rupert A.C. Croft, Wayne Hu, Romeel Davé

Steward Observatory

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104 Scopus citations

Abstract

The Ly α 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_ν < 5.5eV for all values of Ω_m, and m_ν ≲ 2.4(Ω_m/0.17−1)eV, if 0.2 ≤ Ω_m ≤ 0.5 as currently observationally favored (both 95% C.L.).

Original language	English (US)
Pages (from-to)	1092-1095
Number of pages	4
Journal	Physical review letters
Volume	83
Issue number	6
DOIs	https://doi.org/10.1103/PhysRevLett.83.1092
State	Published - Jan 1 1999

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Physics and Astronomy(all)

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10.1103/PhysRevLett.83.1092

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AU - Davé, Romeel

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AB - The Ly α 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: mν < 5.5eV for all values of Ωm, and mν ≲ 2.4(Ωm/0.17−1)eV, if 0.2 ≤ Ωm ≤ 0.5 as currently observationally favored (both 95% C.L.).

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Cosmological limits on the neutrino mass from the Ly ± forest

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