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Merging binaries of neutron stars are not only strong sources of gravitational waves, but also have the potential of revealing states of matter at densities and temperatures not accessible in laboratories. A crucial and long-standing…

High Energy Astrophysical Phenomena · Physics 2019-02-20 Elias R. Most , L. Jens Papenfort , Veronica Dexheimer , Matthias Hanauske , Stefan Schramm , Horst Stöcker , Luciano Rezzolla

We study the impact of a hadron-quark phase transition on the maximum neutron-star mass. The hadronic part of the equation of state relies on the most up-to-date Skyrme nuclear energy density functionals, fitted to essentially all…

High Energy Astrophysical Phenomena · Physics 2013-04-26 N. Chamel , A. F. Fantina , J. M. Pearson , S. Goriely

A phase of strong interacting matter with deconfined quarks is expected in the core of massive neutron stars. In this article, we perform a study of the hadron-quark phase transition in cold (T = 0) neutron star matter and we calculate…

Nuclear Theory · Physics 2013-09-20 Domenico Logoteta , Ignazio Bombaci

We explore the possibility of phase transitions between different quark matter phases occurring within quark stars, giving rise to the hybrid quark stars (HybQSs). First, we obtain the generic phase diagram of possible mass-radius relation…

High Energy Astrophysical Phenomena · Physics 2025-10-28 Zongcan Yang , Tianxiong Zeng , Yan Yan , Wen-Li Yuan , Chen Zhang , Enping Zhou

We describe an unambiguous gravitational-wave signature to identify the occurrence of a strong phase transition from hadronic matter to deconfined quark matter in neutron star mergers. Such a phase transition leads to a strong softening of…

High Energy Astrophysical Phenomena · Physics 2021-02-03 Andreas Bauswein , Sebastian Blacker

We study rotating hybrid stars, with particular emphasis on the effect of spin on the deconfinement phase transition and star properties. Our analysis is based on a hybrid equation of state with a phase transition from hadronic matter…

We study the hadron-quark phase transition at finite temperature in the interior of protoneutron stars, combining the Dyson-Schwinger model for quark matter with the Brueckner-Hartree-Fock approach for hadronic matter. We discuss the…

Nuclear Theory · Physics 2015-06-04 H. Chen , M. Baldo , G. F. Burgio , H. -J. Schulze

We study the consequences of the hadron-quark deconfinement phase transition in stellar compact objects when finite size effects between the deconfined quark phase and the hadronic phase are taken into account. We show that above a…

Astrophysics · Physics 2014-10-13 Ignazio Bombaci , Irene Parenti , Isaac Vidaña

We investigate the property of the hadron-quark mixed phase using the Brueckner-Hartree-Fock model for hadron (hyperon) phase and the MIT bag model for quark phase. To satisfy the Gibbs conditions, charge density as well as baryon number…

Nuclear Theory · Physics 2009-01-30 Toshiki Maruyama , Satoshi Chiba , Hans-Josef Schulze , Toshitaka Tatsumi

We consider the possibility of having hybrid stars with a phase transition from hadrons into strange matter at the core of a neutron star in b equilibrium. For the hadron phase equation of state (EoS) the quark-meson coupling model is used,…

High Energy Physics - Phenomenology · Physics 2021-02-24 Wasif Husain , Anthony W. Thomas

In this work, we explore how astronomical observations (specifically measurements of masses, radii, and tidal deformabilities) can constrain the presence of quark matter inside neutron stars, namely the phase transition from nuclear matter…

Nuclear Theory · Physics 2025-12-10 Fábio Köpp , César H. Lenzi , César V. Flores , and Débora P. Menezes

We construct an equation of state including the hadron-quark phase transition. The mixed phase is obtained by the Gibbs conditions for finite temperature. We adopt the equation of state based on the relativistic mean field theory for the…

Astrophysics · Physics 2008-11-26 Ken'ichiro Nakazato , Kohsuke Sumiyoshi , Shoichi Yamada

The appearance of quark matter in the core of hybrid stars is a fundamental issue in such compact stars. The central density of these stars is sufficiently high such that nuclear matter undergoes a further change into other exotic phases…

High Energy Astrophysical Phenomena · Physics 2015-06-17 Tomoki Endo

Quantum Chromodynamics predicts phase transition from hadronic matter to quark matter at high density, which is highly probable in astrophysical systems like binary neutron star mergers. To explore the critical density where such phase…

High Energy Astrophysical Phenomena · Physics 2024-01-11 Shamim Haque , Ritam Mallick , Shashikesh Kumar Thakur

Possibility of the structured mixed phases at first order phase transitions in neutron stars is reexamined by taking into account the charge screening effect. The Maxwell construction is shown to be not conflicted with the Gibbs conditions…

Nuclear Theory · Physics 2007-05-23 T. Tatsumi , D. N. Voskresensky

A recent solution of the hyperon puzzle by a first order phase transition to color superconducting quark matter is revisited in order to replace the Maxwell construction by an interpolation method which describes a mixed phase. To do this,…

Nuclear Theory · Physics 2020-10-16 M. Shahrbaf , D. Blaschke , S. Khanmohamadi

The possible conditions for hadron-quark phase transition in hybrid star cores are investigated in the present work. For the hadronic matter part the effective chiral model is adopted. Exotic baryonic degrees like hyperons and the delta…

Nuclear Theory · Physics 2021-04-15 Debashree Sen

Based on an extended NJL model that treats baryons as clusters of quarks, we investigate the properties and microscopic structures of mixed phases for various types of first-order phase transitions in a unified manner, where the model…

Nuclear Theory · Physics 2024-09-24 Cheng-Jun Xia , Toshiki Maruyama , Nobutoshi Yasutake , Toshitaka Tatsumi

In this conference proceeding, I discuss in detail the deconfinement to quark matter that takes place at large densities and/or temperatures. The first-order phase transition that is assumed to appear beyond a critical point gives rise to…

Nuclear Theory · Physics 2018-01-26 Veronica Dexheimer

We study the deconfinement transition of hadronic matter into quark matter in neutron star conditions in the light of color superconductivity. Deconfinement is considered to be a first order phase transition that conserves color and flavor.…

Astrophysics · Physics 2008-11-26 G. Lugones , I. Bombaci