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We study the thermal evolution of hypernuclear compact stars constructed from covariant density functional theory of hypernuclear matter and parameterizations which produce sequences of stars containing two-solar-mass objects. For the input…

High Energy Astrophysical Phenomena · Physics 2018-02-21 Adriana R. Raduta , Armen Sedrakian , Fridolin Weber

We studied thermal evolution of isolated neutron stars (NSs) including the pion condensation core, with an emphasis on the stiffness of equation of state (EOS). Many temperature observations can be explained by the minimal cooling scenario…

High Energy Astrophysical Phenomena · Physics 2022-04-06 Akira Dohi , Helei Liu , Tsuneo Noda , Masa-aki Hashimoto

As neutron stars merge they can approach very high nuclear density. Here, we summarized recent results for the evolution and gravitational wave emission from binary neutron star mergers using a a variety of nuclear equations of state with…

High Energy Astrophysical Phenomena · Physics 2023-02-28 Grant J. Mathews , Atul Kedia , Hee Il Kim , In-Saeng Suh

The effect of color superconductivity on the cooling of quark stars and neutron stars with large quark cores is investigated. Various known and new quark-neutrino processes are studied. As a result, stars being in the color flavor locked…

Astrophysics · Physics 2010-04-06 D. Blaschke , T. Klaehn , D. N. Voskresensky

The minimal cooling paradigm for neutron star cooling assumes that enhanced cooling due to neutrino emission from any direct Urca process, due either to nucleons or to exotica such as hyperons, Bose condensates, or deconfined quarks, does…

Solar and Stellar Astrophysics · Physics 2009-12-08 Dany Page , James M. Lattimer , Madappa Prakash , Andrew W. Steiner

We investigate nonradial $f$-mode oscillations of protoneutron stars in full general relativity, employing equations of state described by the Brueckner-Hartree-Fock theory or the relativistic mean field model, while assuming isentropy and…

High Energy Astrophysical Phenomena · Physics 2025-12-04 Zi-Yue Zheng , Ting-Ting Sun , Huan Chen , Jin-Biao Wei , Xiao-Ping Zheng , G. F. Burgio , H. -J. Schulze

Mature neutron stars are expected to contain various kinds of superfluids in their interiors. Modeling such stars requires the knowledge of the mutual entrainment couplings between the different condensates. We present a unified equation of…

High Energy Astrophysical Phenomena · Physics 2015-05-20 N. Chamel , J. M. Pearson , S. Goriely

Recent analyses on the central compact object in the HESS J1731-347 supernova remnant reported not only surprising structural properties (mass $M$ and radius $R$), but also an interesting thermal evolution. More precisely, it has been…

High Energy Astrophysical Phenomena · Physics 2026-01-12 D. G. Nanopoulos , P. Laskos-Patkos , Ch. C. Moustakidis

The recent measurements of the masses of the pulsar J00737-3039B and of the companion J1756-2251 and pulsars PSR J1614-2230, PSR J0348-0432 demonstrate the existence of compact stars with masses in a broad range from 1.2 to 2 $M_\odot$. To…

High Energy Astrophysical Phenomena · Physics 2015-07-17 Hovik Grigorian , Dmitry N. Voskresensky , David Blaschke

We discuss the high-density nuclear equation of state within the Brueckner-Hartree-Fock approach. Particular attention is paid to the effects of nucleonic three-body forces, the presence of hyperons, and the joining with an eventual quark…

Astrophysics · Physics 2007-05-23 M. Baldo , G. F. Burgio , H. -J. Schulze

In this contribution, we briefly present the equation-of-state modelling for application to neutron stars and discuss current constraints coming from nuclear physics theory and experiments. To assess the impact of model uncertainties, we…

High Energy Astrophysical Phenomena · Physics 2023-11-14 A. F. Fantina , F. Gulminelli

We study the merger of binary neutron stars using different realistic, microphysical nuclear equations of state, as well as incorporating magnetic field and neutrino cooling effects. In particular, we concentrate on the influence of the…

General Relativity and Quantum Cosmology · Physics 2015-09-02 C. Palenzuela , S. L. Liebling , D. Neilsen , L. Lehner , O. L. Caballero , E. O'Connor , M. Anderson

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 calculate and provide analytic fits of the factors which describe the reduction of the neutrino emissivity of modified Urca and nucleon-nucleon bremsstrahlung processes by superfluidity of neutrons and protons in neutron-star cores. We…

Astrophysics · Physics 2011-07-19 M. E. Gusakov

The composition of the core of neutron stars (NS) is still under debate. One possibility is that because of the high densities reached in their cores, matter could be deconfined into quark matter. We investigate the existence of hybrid…

Nuclear Theory · Physics 2026-02-20 Milena Albino , Tuhin Malik , Márcio Ferreira , Constança Providência

The properties of dense QCD matter are delineated through the construction of equations of state which should be consistent with the low and high density limits of QCD, nuclear laboratory experiments, and the neutron star observations.…

Nuclear Theory · Physics 2019-12-12 Toru Kojo

Properties of hybrid stars with a mixed phase composed of asymmetric nuclear matter and strange quark matter are studied. The quark phase is investigated by the quark quasiparticle model with a self-consistent thermodynamic and statistical…

Nuclear Theory · Physics 2013-05-31 Xin-Jian Wen

We study the structure of hybrid stars with the Field Correlator Method, extended to the zero temperature limit, for the quark phase. For the hadronic phase, we use the microscopic Brueckner-Hartree- Fock many-body theory. The comparison…

High Energy Physics - Phenomenology · Physics 2009-06-25 G. F. Burgio , M. Baldo , P. Castorina , S. Plumari , D. Zappala'

The equation of state for neutron stars in a wide-density range at zero temperature is constructed. The chiral quark-meson coupling model within relativistic Hartree-Fock approximation is adopted for uniform nuclear matter. The coupling…

High Energy Astrophysical Phenomena · Physics 2013-10-15 Tsuyoshi Miyatsu , Sachiko Yamamuro , Ken'ichiro Nakazato

For neutron stars with hyperon-mixed core, neutrino emissivity is studied under the equation of state, obtained by introducing repulsive three-body force universal for all baryons so as to assure the maximum mass compatible with the…

Nuclear Theory · Physics 2009-11-10 T. Takatsuka , R. Tamagaki