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We investigate the effects of very strong magnetic fields upon the equation of state of dense bayonic matter in which hyperons are present. In the presence of a magnetic field, the equation of state above nuclear density is significantly…

Astrophysics · Physics 2009-11-07 A. E. Broderick , M. Prakash , J. M. Lattimer

We study the effects of very strong magnetic fields on the equation of state (EOS) in multicomponent, interacting matter by developing a covariant description for the inclusion of the anomalous magnetic moments of nucleons. For the…

Astrophysics · Physics 2009-10-31 A. Broderick , M. Prakash , J. M. Lattimer

The equation of state (EoS) and composition of dense and hot $\Delta$-resonance admixed hypernuclear matter is studied under conditions that are characteristic of neutron star binary merger remnants and supernovas. The cold, neutrino free…

Nuclear Theory · Physics 2022-08-01 Armen Sedrakian , Arus Harutyunyan

We review the covariant density functional approach to the equation of state of the dense nuclear matter in compact stars. The main emphasis is on the hyperonization of the dense matter, and the role played by the $\Delta$-resonances. The…

Nuclear Theory · Physics 2023-02-08 Armen Sedrakian , Jia-Jie Li , Fridolin Weber

We study the equation of state of dense baryon matter within the relativistic mean-field model, and we include ${\Delta}$(1232) isobars into IUFSU model with hyperons and consider the possibility of kaon meson condensation. We find that it…

Nuclear Theory · Physics 2023-04-17 Fu Ma , Chen Wu , Wenjun Guo

Knowledge of the equation of state of the baryon matter plays a decisive role in the description of neutron stars. With an increase of the baryon density the filling of Fermi seas of hyperons and $\Delta$ isobars becomes possible. Their…

Nuclear Theory · Physics 2017-04-05 K. A. Maslov , E. E. Kolomeitsev , D. N. Voskresensky

We review the physics of hyperons and $\Delta$-resonances in dense matter in compact stars. The covariant density functional approach to the equation of state and composition of dense nuclear matter in the mean-field Hartree and…

Nuclear Theory · Physics 2023-05-24 Armen Sedrakian , Jia-Jie Li , Fridolin Weber

We systematically study the properties of pure nucleonic and hyperonic magnetic stars using a density-dependent relativistic mean field (DD-RMF) equations of state. We explore several parameter sets and hyperon coupling schemes within the…

Nuclear Theory · Physics 2021-09-09 I. A. Rather , Usuf Rahaman , V. Dexheimer , A. A. Usmani , S. K. Patra

We study the effects of strong magnetic fields on the properties of hyperonic matter. We employ the relativistic mean field theory, which is known to provide excellent descriptions of nuclear matter and finite nuclei. The two additional…

Nuclear Theory · Physics 2009-03-04 P. Yue , F. Yang , H. Shen

We build upon the remarkable, model independent constraints on the equation of state of dense baryonic matter established recently by Annala et al. [1]. Using the quark-meson coupling model, an approach to nuclear structure based upon the…

Nuclear Theory · Physics 2021-03-17 T. F. Motta , P. A. M. Guichon , A. W. Thomas

In this Letter, we report a realistic calculation of the magnetic field profile for the equation of state inside strongly magnetized neutron stars. Unlike previous estimates, which are widely used in the literature, we find that magnetic…

High Energy Astrophysical Phenomena · Physics 2017-10-11 V. Dexheimer , B. Franzon , R. O. Gomes , R. L. S. Farias , S. S. Avancini , S. Schramm

Updated constraints from neutron star masses and radii impose stronger restrictions on the equation of state for baryonic matter at high densities and low temperatures. The existence of two-solar-mass neutron stars rules out many soft…

Nuclear Theory · Physics 2015-06-18 Thomas Hell , Wolfram Weise

We obtain a new equation of state for the nucleonic and hyperonic inner core of neutron stars that fulfills the 2$M_{\odot}$ observations as well as the recent determinations of stellar radii below 13 km. The nucleonic equation of state is…

High Energy Astrophysical Phenomena · Physics 2016-12-28 Laura Tolos , Mario Centelles , Angels Ramos

In this work, we expand on a previously reported realistic calculation of the magnetic field profile for the equation of state inside strongly magnetized neutron stars. In addition to showing that magnetic fields increase quadratically with…

High Energy Astrophysical Phenomena · Physics 2018-01-10 V. Dexheimer , B. Franzon , R. O. Gomes , R. L. S. Farias , S. S. Avancini , S. Schramm

The physics of neutron stars leads historically towards Landau's speculation. Even before the discovery of the neutron, he postulated the possible existence of stars more compact than white dwarfs, containing matter of the order of nuclear…

Nuclear Theory · Physics 2020-12-11 Luiz L. Lopes , Debora P. Menezes

By introducing Dirac ?-function in superhigh magnetic field, we deduce a general formula for pressure of degenerate and relativistic electrons, Pe, which is suitable for superhigh magnetic fields, discuss the quantization of Landau levels…

High Energy Physics - Phenomenology · Physics 2015-11-16 Z. F. Gao , N. Wang , Y. Xu , H. Shan , X. D. Li

Within the covariant density functional theory of hypernuclear matter we build a series of equations of state for hypernuclear compact stars, by calibrating the coupling constants of the $\Xi$-hyperon to the experimental binding energy of…

High Energy Physics - Phenomenology · Physics 2020-02-25 M. Fortin , A. R. Raduta , S. Avancini , C. Providência

We discuss to which extent the modifications of the hyperon--scalar-meson coupling constants affect the equation of state (EoS) hypernuclear matter. The study is carried out within a relativistic density functional theory. The nucleonic…

Nuclear Theory · Physics 2014-04-04 Giuseppe Colucci , Armen Sedrakian

We propose an interpolating equation of state that satisfies phenomenologically established boundary conditions in two extreme regimes at high temperature and low baryon density and at low temperature and high baryon density. We confirm…

Nuclear Theory · Physics 2022-11-18 Yuki Fujimoto , Kenji Fukushima , Yoshimasa Hidaka , Atsuki Hiraguchi , Kei Iida

The equation of state of cold baryonic matter is studied within a relativistic mean-field model with hadron masses and coupling constants depending on a scalar field. We demonstrate that if the effective nucleon mass stops to decrease with…

Nuclear Theory · Physics 2016-02-17 E. E. Kolomeitsev , K. A. Maslov , D. N. Voskresensky
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