Large scale structures in the kinetic gravity braiding model that can be unbraided

Rampei Kimura, Kazuhiro Yamamoto

Research output: Contribution to journalArticle

44 Citations (Scopus)

Abstract

We study cosmological consequences of a kinetic gravity braiding model, which is proposed as an alternative to the dark energy model. The kinetic braiding model we study is characterized by a parameter n, which corresponds to the original galileon cosmological model for n = 1. We find that the background expansion of the universe of the kinetic braiding model is the same as the Dvali-Turner's model, which reduces to that of the standard cold dark matter model with a cosmological constant (ΛCDM model) for n equal to infinity. We also find that the evolution of the linear cosmological perturbation in the kinetic braiding model reduces to that of the ΛCDM model for n = ∞ . Then, we focus our study on the growth history of the linear density perturbation as well as the spherical collapse in the nonlinear regime of the density perturbations, which might be important in order to distinguish between the kinetic braiding model and the ΛCDM model when n is finite. The theoretical prediction for the large scale structure is confronted with the multipole power spectrum of the luminous red galaxy sample of the Sloan Digital Sky survey. We also discuss future prospects of constraining the kinetic braiding model using a future redshift survey like the WFMOS/SuMIRe PFS survey as well as the cluster redshift distribution in the South Pole Telescope survey.

Original languageEnglish
Article number025
JournalJournal of Cosmology and Astroparticle Physics
Volume2011
Issue number4
DOIs
Publication statusPublished - Apr 1 2011

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gravitation
kinetics
perturbation
dark energy
infinity
multipoles
power spectra
dark matter
poles
universe
histories
telescopes
galaxies
expansion
predictions

All Science Journal Classification (ASJC) codes

  • Astronomy and Astrophysics

Cite this

Large scale structures in the kinetic gravity braiding model that can be unbraided. / Kimura, Rampei; Yamamoto, Kazuhiro.

In: Journal of Cosmology and Astroparticle Physics, Vol. 2011, No. 4, 025, 01.04.2011.

Research output: Contribution to journalArticle

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