Cosmological limits on the neutrino mass from the Ly ± forest

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

Research output: Contribution to journalArticlepeer-review

105 Scopus citations


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.).

Original languageEnglish (US)
Pages (from-to)1092-1095
Number of pages4
JournalPhysical review letters
Issue number6
StatePublished - Jan 1 1999

ASJC Scopus subject areas

  • General Physics and Astronomy


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