@Article{Maso-Ferrando_etal2021,
author="Maso-Ferrando, A.
and Sanchis-Gual, N.
and Font, J. A.
and Olmo, G. J.",
title="Boson stars in Palatini f(R) gravity",
journal="Classical and Quantum Gravity",
year="2021",
publisher="Iop Publishing Ltd",
volume="38",
number="19",
pages="194003--25pp",
optkeywords="boson stars; Palatini formalism; modified gravity",
abstract="We explore equilibrium solutions of spherically symmetric boson stars in the Palatini formulation of f (R) gravity. We account for the modifications introduced in the gravitational sector by using a recently established correspondence between modified gravity with scalar matter and general relativity with modified scalar matter. We focus on the quadratic theory f (R) = R + xi R-2 and compare its solutions with those found in general relativity, exploring both positive and negative values of the coupling parameter xi. As matter source, a complex, massive scalar field with and without self-interaction terms is considered. Our results show that the existence curves of boson stars in Palatini f (R) gravity are fairly similar to those found in general relativity. Major differences are observed for negative values of the coupling parameter which results in a repulsive gravitational component for high enough scalar field density distributions. Adding self-interactions makes the degeneracy between f (R) and general relativity even more pronounced, leaving very little room for observational discrimination between the two theories.",
optnote="WOS:000695280300001",
optnote="exported from refbase (https://references.ific.uv.es/refbase/show.php?record=4964), last updated on Wed, 22 Sep 2021 09:02:07 +0000",
issn="0264-9381",
doi="10.1088/1361-6382/ac1fd0",
opturl="https://arxiv.org/abs/2103.15705",
opturl="https://doi.org/10.1088/1361-6382/ac1fd0",
language="English"
}