Dense Stellar Matter with Strange Quark Matter Driven by Kaon Condensation

Abstract

The core of neutron-star matter is supposed to be at a much higher density than the normal nuclear matter density for which various possibilities have been suggested such as, for example, meson or hyperon condensation and/or deconfined quark or color-superconducting matter. In this work, we explore the implication on hadron physics of a dense compact object that has three "phases", nuclear matter at the outer layer, kaon condensed nuclear matter in the middle and strange quark matter at the core. Using a drastically simplified but not unreasonable model, we develop the scenario where the different phases are smoothly connected with the kaon condensed matter playing a role of "doorway" to a quark core, the equation of state (EoS) of which with parameters restricted within the range allowed by nature could be made compatible with the mass vs. radius constraint given by the 1.97-solar mass object PSR J1614-2230 recently observed.

18 pages, 18 figures

References in corpus (8)

• Shapiro delay measurement of a two solar mass neutron star
• Astrophysical Measurement of the Equation of State of Neutron Star Matter
• Half-Skyrmions, Tensor Forces and Symmetry Energy in Cold Dense Matter
• Shell model description of the 14C dating beta decay with Brown-Rho-scaled NN interactions
• Conformal anomaly and the vector coupling in dense matter
• Recent Developments on Kaon Condensation and Its Astrophysical Implications
• Can the maximum mass of neutron stars rule out any equation of state of dense stellar matter before gravity is well understood?
• Kaon Condensation with Lattice QCD

Cited by in corpus (7)

• Hadron-Quark Crossover and Massive Hybrid Stars
• Quark-hybrid matter in the cores of massive neutron stars
• In medium properties of $K^0$ and $\varphi$ mesons under an external magnetic field
• Flavor Symmetry and Topology Change in Nuclear Symmetry Energy for Compact Stars
• Cold Dense Baryonic Matter and Compact Stars
• Proton Mass, Topology Change and Tensor Forces in Compressed Baryonic Matter
• Triple layered compact star with strange quark matter