Neutron stars in general second order scalar-tensor theory: the case of non-minimal derivative coupling
Abstract
We consider the sector of Horndeski's gravity characterized by the coupling between the kinetic scalar field term and the Einstein tensor. We numerically construct neutron star configurations where the external geometry is identical to the Schwarzschild metric but the interior structure is considerably different from standard general relativity. We constrain the only parameter of this model from the requirement that compact configurations exist, and we argue that solutions less compact than neutron stars, such as white dwarfs, are also supported. Therefore, our model provides an explicit modification of general relativity that is astrophysically viable and does not conflict with Solar System tests.
Keywords
Cite
@article{arxiv.1504.05189,
title = {Neutron stars in general second order scalar-tensor theory: the case of non-minimal derivative coupling},
author = {Adolfo Cisterna and Térence Delsate and Massimiliano Rinaldi},
journal= {arXiv preprint arXiv:1504.05189},
year = {2015}
}
Comments
References added, typos fixed. Title changed upon editor request. To appear in Physical Review D