%0 Journal Article
%T Radial Modes of Neutron Stars with a Quark Core
%A P. K. Sahu
%A G. F. Burgio
%A M. Baldo
%J Physics
%D 2001
%I arXiv
%R 10.1086/339510
%X We make a first calculation of eigenfrequencies of radial pulsations of neutron stars with quark cores in a general relativistic formalism given by Chandrasekhar. The equations of state (EOS) used to estimate such eigenfrequencies have been derived by taking proper care of the hadron-quark phase transition. The hadronic EOS's have been obtained in the framework of the Brueckner-Hartree-Fock and relativistic mean field theories, whereas the quark EOS has been derived within the MIT bag model. We find that the periods of oscillations of neutron stars with a quark core show a kink, which is associated with the presence of a mixed phase region. Also, oscillation periods show significant differences between ordinary neutron stars and neutron stars with dynamical quark phases.
%U http://arxiv.org/abs/astro-ph/0111414v1