Scalarisovector δ meson in the relativistic mean field theory and the structure of neutron stars with a quark core
Abstract
In the framework of the relativistic meanfield theory, we have considered the equation of state of superdense nuclear matter, taking into account an effective scalarisovector deltameson field. The effect of the deltameson field on the characteristics of a Maxwelltype quark phase transition has been studied. The quark phase is described with the aid of the improved version of the MIT (Massachusetts Institute of Technology) bag model, in which interactions between the u, d, s quarks inside the bag are taken into account in the onegluon exchange approximation. For different values of the bag parameter B, series of neutron star models with a quark core have been built. Stability problems for neutron stars with an infinitesimal quark core are discussed. An estimate is obtained for the amount of energy released in a catastrophic transformation of a critical neutron star to a star with a finitesize quark core.
 Publication:

Gravitation and Cosmology
 Pub Date:
 March 2009
 DOI:
 10.1134/S0202289309010022
 arXiv:
 arXiv:0902.0050
 Bibcode:
 2009GrCo...15....5A
 Keywords:

 Astrophysics  Solar and Stellar Astrophysics;
 Nuclear Theory
 EPrint:
 7 pages, 2 figures, Talk given at the International Conference RUSGRAV13, June 2328, 2008, PFUR, Moscow