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  1. academic.oup.com

    Using voids to unscreen modified gravity Bridget Falck, Bridget Falck Institute of Theoretical Astrophysics, University of Oslo, PO Box 1029, Blindern, N-0315 Oslo, Norway. E-mail: bridget.falck@astro.uio.no. Search for other works by this author on: ... (CosTesGrav) and the UK STFC grant ST/N000668/1. GBZ is supported by the 1000 Young Talents ...
  2. Title: Using Voids to Unscreen Modified Gravity. Authors: B. Falck, Kazuya Koyama, Gong-bo Zhao, M. Cautun. Download PDF Abstract: The Vainshtein mechanism, present in many models of gravity, is very effective at screening dark matter halos such that the fifth force is negligible and general relativity is recovered within their Vainshtein radii ...
    Author:Bridget Falck, Kazuya Koyama, Gong-Bo Zhao, Marius CautunPublished:2018
  3. body simulations using both dark matter particles and dark matter halos as tracers of the density eld. We nd that the voids are completely unscreened, and the tangential velocity and velocity dispersion pro les of stacked voids show a clear deviation from CDM at all radii. Voids have the potential to provide a powerful test of gravity on
  4. pure.port.ac.uk

    3264 B. Falck et al. Figure 1. M200 mass functions of ROCKSTAR haloes at z = 1 (left-hand panel) and z = 0 (right-hand panel) and the ratio of nDGP to CDM mass functions (bottom panels). 3 METHODS 3.1 Simulations We run cosmological N-body simulations of the nDGP model and CDM using the AMR code ECOSMOG (Li et al. 2012a; Li, Zhao & Koyama 2013a), which is a modified gravity version of RAM-
  5. ar5iv.labs.arxiv.org

    Using Voids to Unscreen Modified Gravity. Bridget Falck, 1 Kazuya Koyama, 2 Gong-Bo Zhao, 3,2 Marius Cautun 4 1 Institute of Theoretical Astrophysics, University of Oslo, PO Box 1029 Blindern, N-0315, Oslo, Norway 2 Institute of Cosmology and Gravitation, University of Portsmouth, Dennis Sciama Building, Burnaby Rd, Portsmouth PO1 3FX, UK
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  7. semanticscholar.org

    The Vainshtein mechanism, present in many models of gravity, is very effective at screening dark matter halos such that the fifth force is negligible and general relativity is recovered within their Vainshtein radii. Vainshtein screening is independent of halo mass and environment, in contrast to e.g. chameleon screening, making it difficult to test. However, our previous studies have found ...
  8. ui.adsabs.harvard.edu

    The Vainshtein mechanism, present in many models of gravity, is very effective at screening dark matter haloes such that the fifth force is negligible and general relativity is recovered within their Vainshtein radii. Vainshtein screening is independent of halo mass and environment, in contrast to e.g. chameleon screening, making it difficult to test. However, our previous studies have found ...
  9. researchportal.port.ac.uk

    We therefore investigate whether cosmic voids, identified as local density minima using a watershed technique, can be used to test models of gravity that exhibit Vainshtein screening. We measure density, velocity, and screening profiles of stacked voids in cosmological N -body simulations using both dark matter particles and dark matter halos ...
  10. Falck, Bridget Lynn Koyama, Kazuya Zhao, Gong-Bo Cautun, Marius . Using voids to unscreen modified gravity. Monthly notices of the Royal Astronomical Society. 2018, 475(3), 3262-3272: dc.identifier.uri: ... Voids have the potential to provide a powerful test of gravity on cosmological scales. en_US: dc.language: EN: dc.publisher: Blackwell ...
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