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Characterizing the linear growth rate of cosmological density perturbations in an f(R) model
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astro-ph.CO
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growthmodelratecosmologicaldensityinvestigatelinearperturbations
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We investigate the linear growth rate of cosmological matter density perturbations of a viable f(R) model both numerically and analytically. We find that the growth rate in the scalar-tensor regime can be characterized by a simple analytic formula. We also investigate a prospect of constraining the Compton wavelength scale of the f(R) model with a future weak lensing survey.
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