Suite of Hydrodynamical Simulations for the Lyman-Alpha Forest with Massive Neutrinos

Abstract

The signature left in quasar spectra by the presence of neutral hydrogen in the Universe allows one to constrain the sum of the neutrino masses with improved sensitivity, with respect to laboratory experiments, and may shed a new light on the neutrino mass hierarchy and on the absolute mass scale of neutrinos. Constraints on cosmological parameters and on the dark energy equation of state can also be derived, from a joint parameter estimation procedure. However, this requires a detailed modeling of the line-of-sight power spectrum of the transmitted flux in the Lyman-Alpha (LyA) forest on scales ranging from a few to hundreds of Mpcs, which in turns demands the inclusion and careful treatment of cosmological neutrinos. To this end, we present here a suite of state-of-the-art hydrodynamical simulations with cold dark matter, baryons and massive neutrinos, specifically targeted for modeling the low-density regions of the IGM as probed by the LyA forest at high-redshift. The simulations span volumes ranging from (25 Mpc/h)^3 to (100 Mpc/h)^3, and are made using either 3 X 192^3~21 millions or 3 X 768^3~1.4 billion particles. The resolution of the various runs can be further enhanced, so that we can reach the equivalent of 3 X 3072^3~87 billion particles in a (100 Mpc/h)^3 box size. The chosen cosmological parameters are compatible with the latest Planck (2013) results, although we also explore the effect of slight variations in the main cosmological and astrophysical parameters. We adopt a particle-type implementation of massive neutrinos, and consider three degenerate species having masses M_nu =0.1, 0.2, 0.3, 0.4 and 0.8 eV, respectively. We improve on previous studies in several ways, in particular with updated routines for IGM radiative cooling and heating processes, and initial conditions based on 2LPT rather than the Zeldovich approximation.

22 pages, 14 figures, accepted for publication in A&A. Has a companion paper Borde et al. (2014)

References in corpus (18)

• A luminous quasar at a redshift of z = 7.085
• Massive neutrinos and cosmology
• Cosmological parameters from combining the Lyman-alpha forest with CMB, galaxy clustering and SN constraints
• Transients from Initial Conditions in Cosmological Simulations
• Baryon Acoustic Oscillations in the Ly-α forest of BOSS quasars
• Quasar-Lyman $\alpha$ Forest Cross-Correlation from BOSS DR11 : Baryon Acoustic Oscillations
• The observed ionization rate of the intergalactic medium and the ionizing emissivity at z >5: Evidence for a photon starved and extended epoch of reionization
• HeII Reionization and its Effect on the IGM
• Neutrino mass from Cosmology
• Possible evidence for an inverted temperature-density relation in the intergalactic medium from the flux distribution of the Lyman-alpha forest
• The Effect of Thermal Neutrino Motion on the Non-linear Cosmological Matter Power Spectrum
• Impact of massive neutrinos on nonlinear matter power spectrum
• An improved measurement of the flux distribution of the Ly-alpha forest in QSO absorption spectra: the effect of continuum fitting, metal contamination and noise properties
• Nonlinear power spectrum in the presence of massive neutrinos: perturbation theory approach, galaxy bias and parameter forecasts
• New approach for precise computation of Lyman-alpha forest power spectrum with hydrodynamical simulations
• Photo-heating and the fate of hard photons during the reionisation of HeII by quasars
• Investigating Emission Line Galaxy Surveys with the Sloan Digital Sky Survey Telescope
• Numerical Simulations of the Lyman-alpha forest - A comparison of Gadget-2 and Enzo

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