Revisiting compact star in F(R) gravity: Roles of chameleon potential and energy conditions

概要

In spite of the empirical successes of general relativity
(GR), it is known that there are several problems in a wide
range of energy scales, from the dark sector problems to the
quantization of the gravitational field. To tackle these
problems within the gravity sector, the modification of
GR, which we call the modified gravity theories, has been
considered. These theories usually introduce new degrees of
freedom (DOFs) for the gravitational field, and additional
DOFs enable us to solve the problems in GR (see [1–3] for
review). The modified gravity theories (and GR) are also
expected to be the effective field theory for the quantum
gravity theory, and we may obtain hints about the most
fundamental theory from the study on modified gravity
theories.
One of the most popular classes in modified gravity
theories is the FðRÞ gravity theory (see [4–6] for review).
The FðRÞ gravity theory is obtained by replacing the Ricci
scalar term R in the Einstein-Hilbert action with a function
of R, FðRÞ. ...

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