Hubble drift in Palatini $f(\mathcal{R})$-theories

Abstract

In a Palatini $f(\mathcal{R})$-model, we define chonodynamical effects due to the choice of atomic clocks as standard reference clocks and we develop a formalism able to quantitatively separate them from the usual effective dark sources one has in extended theories. We apply the formalism to Hubble drift and briefly discuss the issue about the physical frame. In particular, we argue that there is no physical frame in the sense one does different things in different frames and that, in a sense, is the physical characteristic of extended gravity. As an example, we discuss how Jordan frame may be well suited to discuss cosmology, though it fails within the solar system.

arXiv comment18 pages, 4 figures (some references added, some typos corrected)

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Cited by in corpus (3)

• Extended Gravity Cosmography
• Solar System Tests in Brans-Dicke and Palatini f(R)-theories
• The effective Equation of State in Palatini $f(R)$ cosmology