Long range effects in gravity theories with Vainshtein screening

Moritz Platscher, Juri Smirnov

Research output: Contribution to journalJournal articleResearchpeer-review

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Abstract

In this paper we study long range modifications of gravity in the consistent framework of bigravity, which introduces a second massive spin-2 field and allows to continuously interpolate between the regime of General Relativity (mediated by a massless spin-2 field) and massive gravity (mediated by a massive spin-2 field). In particular we derive for the first time the equations for light deflection in this framework and study the effect on the lensing potential of galaxy clusters. By comparison of kinematic and lensing mass reconstructions, stringent bounds can be set on the parameter space of the new spin-2 fields. Furthermore, we investigate galactic rotation curves and the effect on the observable dark matter abundance within this framework.

Original languageEnglish
Article number009
JournalJournal of Cosmology and Astroparticle Physics
Volume2018
Issue number12
Number of pages27
ISSN1475-7516
DOIs
Publication statusPublished - 7. Dec 2018

Fingerprint

screening
gravitation
galactic rotation
relativity
deflection
dark matter
kinematics
galaxies
curves

Keywords

  • galaxy clusters
  • galaxy dynamics
  • gravitational lensing
  • modified gravity

Cite this

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Long range effects in gravity theories with Vainshtein screening. / Platscher, Moritz; Smirnov, Juri.

In: Journal of Cosmology and Astroparticle Physics, Vol. 2018, No. 12, 009, 07.12.2018.

Research output: Contribution to journalJournal articleResearchpeer-review

TY - JOUR

T1 - Long range effects in gravity theories with Vainshtein screening

AU - Platscher, Moritz

AU - Smirnov, Juri

PY - 2018/12/7

Y1 - 2018/12/7

N2 - In this paper we study long range modifications of gravity in the consistent framework of bigravity, which introduces a second massive spin-2 field and allows to continuously interpolate between the regime of General Relativity (mediated by a massless spin-2 field) and massive gravity (mediated by a massive spin-2 field). In particular we derive for the first time the equations for light deflection in this framework and study the effect on the lensing potential of galaxy clusters. By comparison of kinematic and lensing mass reconstructions, stringent bounds can be set on the parameter space of the new spin-2 fields. Furthermore, we investigate galactic rotation curves and the effect on the observable dark matter abundance within this framework.

AB - In this paper we study long range modifications of gravity in the consistent framework of bigravity, which introduces a second massive spin-2 field and allows to continuously interpolate between the regime of General Relativity (mediated by a massless spin-2 field) and massive gravity (mediated by a massive spin-2 field). In particular we derive for the first time the equations for light deflection in this framework and study the effect on the lensing potential of galaxy clusters. By comparison of kinematic and lensing mass reconstructions, stringent bounds can be set on the parameter space of the new spin-2 fields. Furthermore, we investigate galactic rotation curves and the effect on the observable dark matter abundance within this framework.

KW - galaxy clusters

KW - galaxy dynamics

KW - gravitational lensing

KW - modified gravity

U2 - 10.1088/1475-7516/2018/12/009

DO - 10.1088/1475-7516/2018/12/009

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JO - Journal of Cosmology and Astroparticle Physics

JF - Journal of Cosmology and Astroparticle Physics

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