Measuring weak lensing correlations of Type Ia Supernovae

Abstract

We study the feasibility of detecting weak lensing spatial correlations between Supernova (SN) Type Ia magnitudes with present (Dark Energy Survey, DES) and future (Large Synoptic Survey Telescope, LSST) surveys. We investigate the angular auto-correlation function of SN magnitudes (once the background cosmology has been subtracted) and cross-correlation with galaxy catalogues. We examine both analytical and numerical predictions, the latter using simulated galaxy catalogues from the MICE Grand Challenge Simulation. We predict that we will be unable to detect the SN auto-correlation in DES, while it should be detectable with the LSST SN deep fields (15,000 SNe on 70 deg^2) at ~6sigma level of confidence (assuming 0.15 magnitudes of intrinsic dispersion). The SN-galaxy cross-correlation function will deliver much higher signal-to-noise, being detectable in both surveys with an integrated signal-to-noise of ~100 (up to 30 arcmin separations). We predict joint constraints on the matter density parameter (Omega_m) and the clustering amplitude (sigma_8) by fitting the auto-correlation function of our mock LSST deep fields. When assuming a Gaussian prior for Omega_m, we can achieve a 25% measurement of sigma_8 from just these LSST supernovae (assuming 0.15 magnitudes of intrinsic dispersion). These constraints will improve significantly if the intrinsic dispersion of SNe Ia can be reduced.

arXiv comment11 pages, accepted by MNRAS

References in corpus (33)

• Observational Evidence from Supernovae for an Accelerating Universe and a Cosmological Constant
• Measurements of Omega and Lambda from 42 High-Redshift Supernovae
• Planck 2013 results. XVI. Cosmological parameters
• Weak Gravitational Lensing
• Stable clustering, the halo model and nonlinear cosmological power spectra
• Improved cosmological constraints from a joint analysis of the SDSS-II and SNLS supernova samples
• Revising the Halofit Model for the Nonlinear Matter Power Spectrum
• Power Spectra for Cold Dark Matter and its Variants
• Correlated Fluctuations in Luminosity Distance and the (Surprising) Importance of Peculiar Motion in Supernova Surveys
• The MICE Grand Challenge Lightcone Simulation III: Galaxy lensing mocks from all-sky lensing maps
• The MICE Grand Challenge Lightcone Simulation II: Halo and Galaxy catalogues
• Supernova Simulations and Strategies For the Dark Energy Survey
• The Difference Imaging Pipeline for the Transient Search in the Dark Energy Survey
• The onion universe: all sky lightcone simulations in spherical shells
• CMB lensing tomography with the DES Science Verification galaxies
• Constraining dark matter halo properties using lensed SNLS supernovae
• Gravitational Lensing of Distant Field Galaxies by Rich Clusters: II. -- Cluster Mass Distributions
• Learning from the Scatter in Type Ia Supernovae
• On the shear estimation bias induced by the spatial variation of colour across galaxy profiles
• Accurate weak lensing of standard candles. I. Flexible cosmological fits
• The Effect of Weak Lensing on Distance Estimates from Supernovae
• Cosmology from supernova magnification maps
• Distances with <4% Precision from Type Ia Supernovae in Young Star-Forming Environments
• Accurate Weak Lensing of Standard Candles. II. Measuring sigma8 with Supernovae
• Gravitational lensing in the Supernova Legacy Survey (SNLS)
• Problems with Pencils: Lensing Covariance of Supernova Distance Measurements
• Cosmology with Superluminous Supernovae
• First measurement of ${\sigma }_8$ using supernova magnitudes only
• Constraining the halo mass function with observations
• Turning noise into signal: learning from the scatter in the Hubble diagram
• The effects of velocities and lensing on moments of the Hubble diagram
• Prospects and pitfalls of gravitational lensing in large supernova surveys
• Constraining the growth of perturbations with lensing of supernovae

Cited by in corpus (15)

• LSST: from Science Drivers to Reference Design and Anticipated Data Products
• Scientific Synergy Between LSST and Euclid
• The effect of baryons in the cosmological lensing PDFs
• Euclid: Superluminous supernovae in the Deep Survey
• Correlation function of the luminosity distances
• The 6x2pt method: supernova velocities meet multiple tracers
• On the amount of peculiar velocity field information in supernovae from LSST and beyond
• Projected distances to host galaxy reduce SNIa dispersion
• The effect of inhomogeneities on dark energy constraints
• Weak Lensing of Type Ia Supernovae from the Dark Energy Survey
• Forecasts of cosmological constraints from Type Ia supernovae including the weak-lensing convergence
• Unveiling the Universe with Emerging Cosmological Probes
• Geometrical constraints on curvature from galaxy-lensing cross-correlations
• Forecasting Cosmological Constraints from the Weak Lensing Magnification of Type Ia Supernovae Measured by the Nancy Grace Roman Space Telescope
• Reconstructing the weak lensing magnification distribution of Type Ia supernovae