Complementarity of Peculiar Velocity Surveys and Redshift Space Distortions for Testing Gravity

Abstract

Peculiar-velocity surveys of the low-redshift universe have significant leverage to constrain the growth rate of cosmic structure and test gravity. Wide-field imaging surveys combined with multi-object spectrographs (e.g. ZTF2, LSST, DESI, 4MOST) can use Type Ia supernovae as informative tracers of the velocity field, reaching few percent constraints on the growth rate $f{\sigma }_8$ at $z\lesssim 0.2$ where density tracers cannot do better than $\sim 10\%$. Combining the high-redshift DESI survey mapping redshift space distortions with a low-redshift supernova peculiar velocity survey using LSST and DESI can determine the gravitational growth index to $\sigma (\gamma )\approx 0.02$, testing general relativity. We study the characteristics needed for the peculiar velocity survey, and how its complementarity with clustering surveys improves when going from a $\Lambda$CDM model assumption to a $w_0$-$w_a$ cosmology.

6 pages, 4 figures

References in corpus (12)

• The Zwicky Transient Facility: System Overview, Performance, and First Results
• The DESI Experiment Part I: Science,Targeting, and Survey Design
• Science with ASKAP - the Australian Square Kilometre Array Pathfinder
• The Carnegie Supernova Project: Intrinsic Colors of Type Ia Supernovae
• The 6dF Galaxy Velocity Survey: Cosmological constraints from the velocity power spectrum
• Cosmological Forecasts for Combined and Next Generation Peculiar Velocity Surveys
• The peculiar velocity field: constraining the tilt of the Universe
• Improving constraints on the growth rate of structure by modelling the density-velocity cross-correlation in the 6dF Galaxy Survey
• Measuring the growth rate of structure with Type IA Supernovae from LSST
• 4MOST Consortium Survey 10: The Time-Domain Extragalactic Survey (TiDES)
• The Three Faces of Omega_m: Testing Gravity with Low and High Redshift SN Ia Surveys
• Testing Gravity Using Type Ia Supernovae Discovered by Next-Generation Wide-Field Imaging Surveys

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• The Pantheon+ Analysis: Evaluating Peculiar Velocity Corrections in Cosmological Analyses with Nearby Type Ia Supernovae
• Joint velocity and density reconstruction of the Universe with nonlinear differentiable forward modeling
• Measuring the Hubble constant with kilonovae using the Expanding Photosphere Method
• Growth-rate measurement with type-Ia supernovae using ZTF survey simulations
• Exploring the Redshift-Space Peculiar Velocity Field and its Power Spectrum
• Cosmology Requirements on Supernova Photometric Redshift Systematics for Rubin LSST and Roman Space Telescope
• Galaxy clustering from the bottom up: A Streaming Model emulator I
• Forecast for growth-rate measurement using peculiar velocities from LSST supernovae
• Generalized framework for likelihood-based field-level inference of growth rate from velocity and density fields
• Constraining Scale Dependent Growth with Redshift Surveys
• Breaking the ${\tau }_{\mathrm{T}}-f$ degeneracy of the kinetic Sunyaev Zel'dovich cosmology in redshift space
• Model Independent Dark Matter Properties from Cosmic Growth
• Testing modified (Horndeski) gravity by combining intrinsic galaxyalignments with cosmic shear
• Joint Curvature and Growth Rate measurements with Supernova Peculiar Velocities and the CMB