Results 1 to 10 of about 200,989 (232)

The quark strange star in the enlarged Nambu-Jona-Lasinio model [PDF]

open access: goldNewJ.Phys.4:14,2002, 2002
The strange quark star is investigated within the enlarged SU(3) Nambu-Jona-Lasinio (NJL). The stable quark star exists till maximal configutation with rho_m=3.1, 10^15, g/cm^3 with M_m=1.61, M_Sun and R_m=8.74, km is reached. Strange quarks appear for density above rho_c=9.84 g/cm^3 for the quark star with radius R_c=8.003 km and M_c=0.77, M_Sun.
R. Mańka   +2 more
arxiv   +4 more sources

Quark star matter at finite temperature in a quasiparticle model [PDF]

open access: diamondEuropean Physical Journal C: Particles and Fields, 2021
We study the thermodynamic properties of asymmetric quark matter, large mass quark stars (QSs), and proto-quark stars (PQSs) within the quasiparticle model. Considering the effects of temperature within quasiparticle model can significantly influence the
Peng-Cheng Chu   +5 more
doaj   +2 more sources

Hybrid stars with large strange quark cores [PDF]

open access: yesEPJ Web of Conferences, 2022
The possible existence of hybrid stars is studied using several multiquark interaction channels. The hadronic phase consists of an equation of state (EoS) with presently accepted nuclear matter properties and the quark model is constrained by the vacuum ...
Ferreira Márcio   +2 more
doaj   +2 more sources

Quark Star Mergers: The Equation of State of Decompressed Quark Matter and Observational Signatures [PDF]

open access: greenarXiv
Quark stars are challenging to confirm or exclude observationally because they can have similar masses and radii as neutron stars. By performing the first calculation of the non-equilibrium equation of state of decompressed quark matter at finite temperature, we determine the properties of the ejecta from binary quark-star or quark star-black hole ...
Zhiqiang Miao, Zhenyu Zhu, Dong Lai
arxiv   +3 more sources

Cooling of neutron stars with quark-hadron continuity [PDF]

open access: yesEPJ Web of Conferences, 2022
Neutron stars are high-density objects formed by the gravitational collapse of massive stars, and the whole star can be likened to a giant nucleus. The interior of a neutron star is considered to contain exotic particles and states which do not appear in
Noda Tsuneo   +4 more
doaj   +1 more source

Neutron Star Mergers and the Quark Matter Equation of State [PDF]

open access: yesEPJ Web of Conferences, 2022
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 and without a ...
Mathews Grant J.   +3 more
doaj   +1 more source

The Macro-Physics of the Quark-Nova: Astrophysical Implications

open access: yesUniverse, 2022
A quark-nova is a hypothetical stellar evolution branch where a neutron star converts explosively into a quark star. Here, we discuss the intimate coupling between the micro-physics and macro-physics of the quark-nova and provide a prescription for how ...
Rachid Ouyed
doaj   +1 more source

Semi-empirical relation to understand matter properties at neutron star interiors

open access: yesEuropean Physical Journal C: Particles and Fields, 2022
The occurrence of quark matter at the center of neutron stars is still in debate. This study defines some semi-empirical parameters that try to quantify the presence and the amount of quark matter at star interiors.
Ritam Mallick   +2 more
doaj   +1 more source

Gravitational Waves from Strange Star Core–Crust Oscillation

open access: yesUniverse, 2022
According to the strange quark matter hypothesis, pulsars may actually be strange stars composed of self-bound strange quark matter. The normal matter crust of a strange star, unlike that of a normal neutron star, is supported by a strong electric field.
Ze-Cheng Zou   +2 more
doaj   +1 more source

Generation of Electric Current by Magnetic Field at the Boundary: Quantum Scale Anomaly Versus Semiclassical Meissner Current Outside of the Conformal Limit

open access: yesAdvanced Physics Research, EarlyView., 2023
The paper discusses the role of scale anomaly in generating edge electric currents via the scale magnetic effect in scalar electrodynamics. Although the boundary electric current is much weaker than the Meissner current induced in superconducting materials, the scale anomaly can enhance conductivity near the boundary of the material.
Maxim Chernodub   +2 more
wiley   +1 more source

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