Crystalline chiral condensates as a component of compact stars
Abstract
We investigate the influence of spatially inhomogeneous chiral symmetry-breaking condensates in a magnetic field background on the equation of state for compact stellar objects. After building a hybrid star composed of nuclear and quark matter using the Maxwell construction, we find, by solving the Tolman-Oppenheimer-Volkoff equations for stellar equilibrium, that our equation of state supports stars with masses around 2 for values of the magnetic field that are in accordance with those inferred from magnetar data. The inclusion of a weak vector interaction term in the quark part allows one to reach 2 solar masses for relatively small central magnetic fields, making this composition a viable possibility for describing the internal degrees of freedom of this class of astrophysical objects.
Keywords
Cite
@article{arxiv.1505.05094,
title = {Crystalline chiral condensates as a component of compact stars},
author = {S. Carignano and E. J. Ferrer and V. de la Incera and L. Paulucci},
journal= {arXiv preprint arXiv:1505.05094},
year = {2015}
}
Comments
Added new graphs, references and physical discussions. This version to appear at Phys. Rev. D