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We present a study of hybrid neutron stars with color superconducting quark matter cores at finite temperature that results in sequences of stars with constant entropy per baryon, $s/n_B={\rm const}$. For the quark matter equation of state,…

We study the hadron-quark mixed phase, which may occur in the interior of neutron stars. The relativistic mean-field model is employed to describe the hadronic phase, while the Nambu--Jona-Lasinio model is used for the quark phase. We…

Nuclear Theory · Physics 2019-06-20 X. H. Wu , H. Shen

Aims: We present a new microscopic hadron-quark hybrid equation of state model for astrophysical applications, from which compact hybrid star configurations are constructed. These are composed of a quark core and a hadronic shell with a…

High Energy Astrophysical Phenomena · Physics 2015-04-29 Sanjin Benic , David Blaschke , David E. Alvarez-Castillo , Tobias Fischer , Stefan Typel

Although it is conjectured that a phase transition from hadronic to deconfined quark matter in the ultrahigh-density environment of Neutron Stars (NS), the nature of phase transition remains an unresolved mystery. Furthermore, recent…

Neutron star interiors provide the opportunity to probe properties of cold dense matter in the QCD phase diagram. Utilizing models of dense matter in accord with nuclear systematics at nuclear densities, we investigate the compatibility of…

High Energy Astrophysical Phenomena · Physics 2020-06-01 Sophia Han , M. A. A. Mamun , S. Lalit , C. Constantinou , M. Prakash

The phase transition calculations are utilized for an in-depth understanding of the thermodynamics of the deconfinement transition to perform the best analysis of the QCD phase diagram. The phenomenological justifications for a mathematical…

Nuclear Theory · Physics 2023-03-07 Mahboubeh Shahrbaf

We consider the possible formation of the quark hadron mixed phase in protoneutron stars. We discuss two cases: the first one, corresponding to a vanishingly small value of the surface tension of quark matter, is the well known mixed phase…

Solar and Stellar Astrophysics · Physics 2014-11-20 Giuseppe Pagliara , Matthias Hempel , Jurgen Schaffner-Bielich

We study the charge screening effect in the hadron-quark mixed phase. By including the charge screening effect, rearrangement of charged particles occurs and some part becomes locally charge-neutral. As a result the equation of state for…

Astrophysics · Physics 2007-05-23 Tomoki Endo , Toshiki Maruyama , Satoshi Chiba , Toshitaka Tatsumi

We present two types of models for hybrid compact stars composed of a quark core and a hadronic mantle with an abrupt first order phase transition at the interface which are in accordance with the latest astrophysical measurements of two 2…

Nuclear Theory · Physics 2013-10-24 David Blaschke , David E. Alvarez-Castillo , Sanjin Benic

A prescription is presented for the interpolation between multi-dimensional distribution templates based on one or multiple model parameters. The technique uses a linear combination of templates, each created using fixed values of the…

Data Analysis, Statistics and Probability · Physics 2014-10-29 Max Baak , Stefan Gadatsch , Robert Harrington , Wouter Verkerke

The observation and distinction of two compact stars with an identical mass but a different radius would be a clear sign of hadron-quark phase transition in nuclear matter. Motivated by studies searching for significant deviations in the…

Nuclear Theory · Physics 2023-06-21 P. Laskos-Patkos , Ch. C. Moustakidis

To estimate the feasibility of dense-matter phase transition, we studied the evolution of the central density as well as the baryon chemical potential of accreting neutron stars. We compared the thin-disk accretion with and without the…

High Energy Astrophysical Phenomena · Physics 2011-12-13 M. Bejger , J. L. Zdunik , P. Haensel , M. Fortin

The Quark-Hadron Chiral Parity-Doublet model (Q$\chi$P) is applied to calculate compact star properties in the presence of a deconfinement phase transition. Within this model, a consistent description of nuclear matter properties, chiral…

Nuclear Theory · Physics 2017-12-20 A. Mukherjee , S. Schramm , J. Steinheimer , V. Dexheimer

We reconsider the problem of the hyperon puzzle and its suggested solution by quark deconfinement within the two-phase approach to hybrid compact stars with recently obtained hadronic and quark matter equations of state. For the hadronic…

Nuclear Theory · Physics 2020-03-04 M. Shahrbaf , D. Blaschke , A. G. Grunfeld , H. R. Moshfegh

This paper introduces data augmentation for point clouds by interpolation between examples. Data augmentation by interpolation has shown to be a simple and effective approach in the image domain. Such a mixup is however not directly…

Computer Vision and Pattern Recognition · Computer Science 2020-08-17 Yunlu Chen , Vincent Tao Hu , Efstratios Gavves , Thomas Mensink , Pascal Mettes , Pengwan Yang , Cees G. M. Snoek

The hadron-quark phase transition in the interior of compact stars is investigated, when the transition proceeds through a mixed phase. The hadronic phase is described in the framework of relativistic mean-field theory, when also the…

Solar and Stellar Astrophysics · Physics 2009-12-02 G. B. Alaverdyan

Different extensions of the Nambu-Jona-Lasinio model, known to satisfy expected QCD chiral symmetry aspects, are used to investigate a possible hadron-quark phase transition at zero temperature and to build the corresponding binodal…

High Energy Astrophysical Phenomena · Physics 2019-01-16 Clebson A. Graeff , Marcelo D. Alloy , Kauan D. Marquez , Constança Providência , Débora P. Menezes

Possibility of structured mixed phase at first order phase transitions is examined by taking into account of charge screening and surface effects. Hadron-quark phase transition in dense neutron star interiors is considered as a concrete…

Nuclear Theory · Physics 2015-06-26 T. Tatsumi , M. Yasuhira , D. N. Voskresensky

We propose a mechanism for the damping of density oscillations in multicomponent compact stars. The mechanism is the periodic conversion between different phases, i.e., the movement of the interface between them, induced by pressure…

Solar and Stellar Astrophysics · Physics 2015-12-11 Mark G. Alford , Sophia Han , Kai Schwenzer

The mixed phase of quarks and hadrons which might exist in the dense matter encountered in the varying conditions of temperature and trapped neutrino fraction in proto-neutron stars is studied. The extent that the mixed phase depends upon…

Nuclear Theory · Physics 2009-11-06 A. Steiner , M. Prakash , J. M. Lattimer