output
19982025
most citedDynamics of dark energy

6.3k citations

researchers with a paper here

Counting papers with at most 25 authors, so collaboration author lists do not stand in for the people here.

collaborating institutions
Showing 2007 · astro-phShow all

6 papers · 2 filters

astro-ph2007★ 124 cited

Density perturbations in f(R) gravity theories in metric and Palatini formalisms

Shinji Tsujikawa, Kotub Uddin, Reza Tavakol

We make a detailed study of matter density perturbations in both metric and Palatini formalisms in theories whose Lagrangian density is a general function, f(R), of the Ricci scala…

astro-ph2007★ 445 cited

Observational signatures of f(R) dark energy models that satisfy cosmological and local gravity constraints

Shinji Tsujikawa

We discuss observational consequences of f(R) dark energy scenarios that satisfy local gravity constraints (LGC) as well as conditions of the cosmological viability. The model we s…

astro-ph2007★ 297 cited

Matter density perturbations and effective gravitational constant in modified gravity models of dark energy

Shinji Tsujikawa

We derive the equation of matter density perturbations on sub-horizon scales for a general Lagrangian density f(R, phi, X) that is a function of a Ricci scalar R, a scalar field ph…

astro-ph2007★ 281 cited

Phantom crossing, equation-of-state singularities, and local gravity constraints in f(R) models

Luca Amendola, Shinji Tsujikawa

We identify the class of f(R) dark energy models which have a viable cosmology, i.e. a matter dominated epoch followed by a late-time acceleration. The deviation from a LambdaCDM m…

astro-ph2007★ 386 cited

Probing the Coupling between Dark Components of the Universe

Zong-Kuan Guo, Nobuyoshi Ohta, Shinji Tsujikawa

We place observational constraints on a coupling between dark energy and dark matter by using 71 Type Ia supernovae (SNe Ia) from the first year of the five-year Supernova Legacy S…

astro-ph2007★ 167 cited

f(R) gravity theories in Palatini formalism: cosmological dynamics and observational constraints

Stephane Fay, Reza Tavakol, Shinji Tsujikawa

We make a systematic study of the cosmological dynamics for a number of f(R) gravity theories in Palatini formalism. We find a number of interesting results: (i) models based on th…