$\phi$-modes of neutron stars in a massless scalar-tensor theory
Abstract
Scalar-tensor theories allow for a rich spectrum of quasinormal modes of neutron stars. The presence of the scalar field allows for polar monopole and dipole radiation, as well as for additional higher multipole modes led by the scalar field. Here we present these scalar-led -modes for the lowest multipoles, , 1 and 2 for a massless scalar-tensor theory of the Brans-Dicke type, motivated by theory, and compare with those of a minimally coupled scalar field in general relativity. We consider a set of six realistic equations of state and extract universal relations for the modes.
Keywords
Cite
@article{arxiv.2207.11370,
title = {$\phi$-modes of neutron stars in a massless scalar-tensor theory},
author = {Jose Luis Blázquez-Salcedo and Luis Manuel González-Romero and Fech Scen Khoo and Jutta Kunz and Vincent Preut},
journal= {arXiv preprint arXiv:2207.11370},
year = {2024}
}
Comments
23 pages, 16 figures, Invited contribution to the volume "Perturbations in Modified Gravitation and Cosmology", to appear in Frontiers in Astronomy And Space Sciences