Probing Neutrinos from Planck and Forthcoming Galaxy Redshift Surveys

Abstract

We investigate how much the constraints on the neutrino properties can be improved by combining the CMB, the photometric and spectroscopic galaxy redshift surveys which include the CMB lensing, galaxy lensing tomography, galaxy clustering and redshift space distortion observables. We pay a particular attention to the constraint on the neutrino mass in view of the forthcoming redshift surveys such as the Euclid satellite and the LSST survey along with the Planck CMB lensing measurements. Combining the transverse mode information from the angular power spectrum and the longitudinal mode information from the spectroscopic survey with the redshift space distortion measurements can determine the total neutrino mass with the projected error of O(0.02)eV. Our analysis fixes the mass splittings among the neutrino species to be consistent with the neutrino oscillation data, and we accordingly study the sensitivity of our parameter estimations on the minimal neutrino mass. The cosmological measurement of the total neutrino mass can distinguish between the normal and inverted mass hierarchy scenarios if the minimal neutrino mass < 0.005 eV with the predicted 1-σ uncertainties taken into account.

30 pages, 7 figures, 5 tables, accepted to JCAP

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• Systematic errors in the measurement of neutrino masses due to baryonic feedback processes: Prospects for stage IV lensing surveys
• Tests of Neutrino and Dark Radiation Models from Galaxy and CMB surveys
• General Relativistic Corrections to the Weak Lensing Convergence Power Spectrum
• Synergies between radio, optical and microwave observations at high redshift
• CMB probes on the correlated axion isocurvature perturbation
• Neutrino masses from CMB B-mode polarization and cosmic growth rate