Hypermassive quark cores

Abstract

ABSTRACT Using a quantum hadrodynamics (QHD) and MIT-based models, we construct hybrid stars within the Maxwell criteria of hadron-quark phase transition. We are able to produce a hybrid star with maximum mass of 2.15 M⊙. Furthermore, a 2.03-M⊙ star with a quark core corresponding to more than $80{{\ \rm per\ cent}}$ of both, its total mass and radius, is also possible.