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Matter power spectrum in f(R) gravity with massive neutrinos
Hayato Motohashi, Alexei A. Starobinsky, Jun'ichi Yokoyama
The effect of massive neutrinos on matter power spectrum is discussed in the context of gravity. It is shown that the anomalous growth of density fluctuations on small scale…
Phantom boundary crossing and anomalous growth index of fluctuations in viable f(R) models of cosmic acceleration
Hayato Motohashi, Alexei A. Starobinsky, Jun'ichi Yokoyama
Evolution of a background space-time metric and sub-horizon matter density perturbations in the Universe is numerically analyzed in viable models of present dark energy and…
Phantom behaviour and growth index anomalous evolution in viable f(R) gravity models
Hayato Motohashi, Alexei A. Starobinsky, Jun'ichi Yokoyama
We present numerical calculation of the evolution of a background space-time metric and sub-horizon matter density perturbations in viable gravity models of present dark ene…