Cosmological Limits on the Neutrino Mass from the Lya Forest

Princeton); Romeel Dave' (Princeton); Rupert A.C. Croft (Harvard CfA); Wayne Hu (IAS

arxiv: astro-ph/9903335 · v1 · submitted 1999-03-23 · 🌌 astro-ph

Cosmological Limits on the Neutrino Mass from the Lya Forest

Rupert A.C. Croft (Harvard CfA) , Wayne Hu (IAS , Princeton) , Romeel Dave' (Princeton) This is my paper

classification 🌌 astro-ph

keywords massforestomegacosmologicallimitsmassiveneutrinoneutrinos

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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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