Study of cubic Galileon gravity using N-body simulations

Jiajun Zhang, Bikash R. Dinda, Md. Wali Hossain, Anjan A. Sen, and Wentao Luo
Phys. Rev. D 102, 043510 – Published 7 August 2020

Abstract

We use N-body simulation to study the structure formation in the cubic Galileon gravity model where along with the usual kinetic and potential term we also have a higher derivative self-interaction term. We find that the large scale structure provides a unique constraining power for this model. The matter power spectrum, halo mass function, galaxy-galaxy weak lensing signal, marked density power spectrum as well as count in cell are measured. The simulations show that there are less massive halos in the cubic Galileon gravity model than corresponding ΛCDM model and the marked density power spectrum in these two models are different by more than 10%. Furthermore, the cubic Galileon model shows significant differences in voids compared to ΛCDM. The number of low density cells is far higher in the cubic Galileon model than that in the ΛCDM model. Therefore, it would be interesting to put constraints on this model using future large scale structure observations, especially in void regions.

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  • Received 27 April 2020
  • Accepted 22 July 2020

DOI:https://doi.org/10.1103/PhysRevD.102.043510

© 2020 American Physical Society

Physics Subject Headings (PhySH)

Gravitation, Cosmology & Astrophysics

Authors & Affiliations

Jiajun Zhang1,*, Bikash R. Dinda2,†, Md. Wali Hossain3,‡, Anjan A. Sen4,§, and Wentao Luo5,∥

  • 1Center for Theoretical Physics of the Universe, Institute for Basic Science (IBS), Daejeon 34126, Korea
  • 2Department of Theoretical Physics, Tata Institute of Fundamental Research, Dr Homi Bhabha Road, Navy Nagar, Colaba, Mumbai-400005, India
  • 3Center for High Energy Physics, Kyungpook National University, Daegu, Korea
  • 4Centre For Theoretical Physics, Jamia Millia Islamia, New Delhi, 110025, India
  • 5Kavli Institute for the Physics and Mathematics of the Universe (Kavli IPMU, WPI), University of Tokyo, Chiba 277-8582, Japan

  • *liambx@ibs.re.kr
  • bikashd18@gmail.com
  • wali.h@knu.ac.kr
  • §aasen@jmi.ac.in
  • wentao.luo@ipmu.jp

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Issue

Vol. 102, Iss. 4 — 15 August 2020

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