Constraining Neutrinos and Dark Energy with Galaxy Clustering in the Dark Energy Survey

Abstract

We determine the forecast errors on the absolute neutrino mass scale and the equation of state of dark energy by combining synthetic data from the Dark Energy Survey (DES) and the Cosmic Microwave Background (CMB) Planck surveyor. We use angular clustering of galaxies for DES in 7 redshift shells up to $z\sim 1.7$ including cross-correlations between different redshift shells. We study models with massless and massive neutrinos and three different dark energy models: $\Lambda$CDM ($w=-1$), wCDM (constant $w$), and waCDM (evolving equation of state parameter $w(a)=w_0+w_a(1-a)$). We include the impact of uncertainties in modeling galaxy bias using a constant and a redshift-evolving bias model. For the $\Lambda$CDM model we obtain an upper limit for the sum of neutrino masses from DES+Planck of $\Sigma m_{\nu }<0.08$ eV (95\% C.L.) for a fiducial mass of $\Sigma m_{\nu }=0.047$ eV, with a 1$\sigma$ error of 0.02 eV, assuming perfect knowledge of galaxy bias. For the wCDM model the limit is $\Sigma m_{\nu }<0.10$ eV. For a wCDM model where galaxy bias evolves with redshift, the upper limit on the sum of neutrino masses increases to 0.19 eV. DES will be able to place competitive upper limits on the sum of neutrino masses of 0.1-0.2 eV and could therefore strongly constrain the inverted mass hierarchy of neutrinos. In a wCDM model the 1$\sigma$ error on constant $w$ is $\Delta w=0.03$ from DES galaxy clustering and Planck. Allowing $\Sigma m_{\nu }$ as a free parameter increases the error on $w$ by a factor of 2, with $\Delta w=0.06$. In a waCDM model, in which the dark energy equation of state varies with time, the errors are $\Delta w_0=0.2$ and $\Delta w_a=0.42$. Including neutrinos and redshift dependent galaxy bias increases the errors to $\Delta w_0=0.35$ and $\Delta w_a=0.89$.

27 pages, 22 figures, 10 tables

References in corpus (24)

• Five-Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Cosmological Interpretation
• Dark Energy and the Accelerating Universe
• Improved cosmological constraints from a joint analysis of the SDSS-II and SNLS supernova samples
• Cosmological Constraints from the SDSS Luminous Red Galaxies
• Massive neutrinos and cosmology
• Phenomenology with Massive Neutrinos
• Global status of neutrino oscillation parameters after Neutrino-2012
• A Parameterized Post-Friedmann Framework for Modified Gravity
• Neutrino masses and cosmology with Lyman-alpha forest power spectrum
• The shape of the SDSS DR5 galaxy power spectrum
• Crossing the Phantom Divide with Parameterized Post-Friedmann Dark Energy
• Probing cosmological parameters with the CMB: Forecasts from full Monte Carlo simulations
• Neutrino mass from Cosmology
• The clustering of galaxies in the SDSS-III Baryon Oscillation Spectroscopic Survey: Baryon Acoustic Oscillations in the correlation function of LOWZ and CMASS galaxies in Data Release 12
• The Effect of Thermal Neutrino Motion on the Non-linear Cosmological Matter Power Spectrum
• CMB lensing tomography with the DES Science Verification galaxies
• Relic Neutrinos, thermal axions and cosmology in early 2014
• Galaxy clustering, photometric redshifts and diagnosis of systematics in the DES Science Verification data
• Scale Dependent Galaxy Bias in the SDSS as a function of Luminosity and Colour
• Neutrino Mass, Dark Energy, and the Linear Growth Factor
• On what scale should inflationary observables be constrained?
• Constraining Fundamental Physics with Future CMB Experiments
• Properties and use of CMB power spectrum likelihoods
• The WMAP normalization of inflationary cosmologies

Cited by in corpus (4)

• Constraining neutrino mass and extra relativistic degrees of freedom in dynamical dark energy models using Planck 2015 data in combination with low-redshift cosmological probes: basic extensions to $\Lambda$CDM cosmology
• DEMNUni: disentangling dark energy from massive neutrinos with the void size function
• Tests of Neutrino and Dark Radiation Models from Galaxy and CMB surveys
• Constraints on the Active and Sterile Neutrino Masses from Beta-Ray Spectra: Past, Present and Future