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Reconstructing the gravitational field of the local Universe

Authors :: Jens Jasche
Harry Desmond
Guilhem Lavaux
Pedro G. Ferreira
Institut d'Astrophysique de Paris (IAP)
Institut national des sciences de l'Univers (INSU - CNRS)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)
Institut Lagrange de Paris
Sorbonne Universités
Sorbonne Université (SU)
Institut d'Astrophysique de Paris ( IAP )
Université Pierre et Marie Curie - Paris 6 ( UPMC ) -Institut national des sciences de l'Univers ( INSU - CNRS ) -Centre National de la Recherche Scientifique ( CNRS )
Source :: Mon.Not.Roy.Astron.Soc., Mon.Not.Roy.Astron.Soc., 2018, 474 (3), pp.3152-3161. ⟨10.1093/mnras/stx3062⟩, Monthly Notices of the Royal Astronomical Society, Monthly Notices of the Royal Astronomical Society, Oxford University Press (OUP): Policy P-Oxford Open Option A, 2018, 474 (3), pp.3152-3161. ⟨10.1093/mnras/stx3062⟩, Mon.Not.Roy.Astron.Soc., 2018, 474 (3), pp.3152-3161. 〈10.1093/mnras/stx3062〉
Publication Year :: 2017
Publisher :: Oxford University Press (OUP), 2017.
Abstract: Tests of gravity at the galaxy scale are in their infancy. As a first step to systematically uncovering the gravitational significance of galaxies, we map three fundamental gravitational variables -- the Newtonian potential, acceleration and curvature -- over the galaxy environments of the local universe to a distance of approximately 200 Mpc. Our method combines the contributions from galaxies in an all-sky redshift survey, halos from an N-body simulation hosting low-luminosity objects, and linear and quasi-linear modes of the density field. We use the ranges of these variables to determine the extent to which galaxies expand the scope of generic tests of gravity and are capable of constraining specific classes of model for which they have special significance. Finally, we investigate the improvements afforded by upcoming galaxy surveys.<br />Comment: 12 pages, 4 figures; revised to match MNRAS accepted version