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A phase transition from paramagnetism to ferromagnetism in neutron star interior is explored. Since there is $^3$P$_2$ neutron superfluid in neutron star interior, it can be treated as a system of magnetic dipoles. Under the presence of…

高能天体物理现象 · 物理学 2009-11-12 Qiu He Peng , Hao Tong

In a superhigh magnetic field, direct Urca reactions can proceed for an arbitrary proton concentration. Since only the electrons with high energy $E$ ($E > Q$, $Q$ is the threshold energy of inverse $\beta-$decay) at large Landau levels can…

高能天体物理现象 · 物理学 2013-12-11 Z. F. Gao , N. Wang , J. P. Yuan , L. Jiang , D. L. Song

In this paper we discuss in detail the quantization of Landau energy levels of a strongly magnetized and completely degenerate relativistic electron gas in neutron stars. In particular, we focus on the Fermi energy dependence of the…

高能天体物理现象 · 物理学 2016-12-15 Qiu-he Peng , Jie Zhang , Chih-kang Chou , Zhi-fu Gao

In this paper, we investigate the electron Landau-level stability and its influence on the electron Fermi energy, $E_{\rm F}(e)$, in the circumstance of magnetars, which are powered by magnetic field energy. In a magnetar, the Landau levels…

高能天体物理现象 · 物理学 2016-04-27 C. Zhu , Z. F. Gao , X. D. Li , N. Wang , J. P. Yuan , Q. H. Peng

The loss of magnetic pressure accompanying the decay of the magnetic field in a magnetar may trigger exothermic electron captures by nuclei in the shallow layers of the stellar crust. Very accurate analytical formulas are obtained for the…

高能天体物理现象 · 物理学 2022-07-01 Nicolas Chamel , Anthea Francesca Fantina

Landau's Fermi Liquid parameters are calculated for non-superfluid pure neutron matter in the presence of a strong magnetic field at zero temperature. The particle-hole interactions in the system, where a net magnetization may be present,…

核理论 · 物理学 2009-08-26 M. Angeles Perez-Garcia , J. Navarro , A. Polls

We study the relative importance of several recent updates of microphysics input to the neutron star cooling theory and the effects brought about by superstrong magnetic fields of magnetars, including the effects of the Landau quantization…

高能天体物理现象 · 物理学 2018-06-13 A. Y. Potekhin , G. Chabrier

Magnetars are neutron stars endowed with surface magnetic fields of the order of $10^{14}-10^{15}$~G, and with presumably much stronger fields in their interior. As a result of Landau quantization of electron motion, the neutron-drip…

高能天体物理现象 · 物理学 2016-07-21 N. Chamel , Y. D. Mutafchieva , Zh. K. Stoyanov , L. M. Mihailov , R. L. Pavlov

We propose a new heating mechanism in magnetar crusts. Magnetars' crustal magnetic fields are much stronger than their surface fields; therefore, magnetic pressure partially supports the crust against gravity. The crust loses magnetic…

高能天体物理现象 · 物理学 2015-05-14 Randall L. Cooper , David L. Kaplan

We discuss outer and inner crusts of neutron stars in strong magnetic fields. Here, we demonstrate the effect of Landau quantization of electrons on the ground state properties of matter in outer and inner crusts in magnetars. This effect…

高能天体物理现象 · 物理学 2015-06-12 Rana Nandi , Debades Bandyopadhyay

In this paper, we consider the effect of Landau levels on the decay of superhigh magnetic fields of magnetars. Applying ${}^3P_2$ anisotropic neutron superfluid theory yield a second-order differential equation for a superhigh magnetic…

高能天体物理现象 · 物理学 2013-12-11 Z. F. Gao , N. Wang , J. P. Yuan , L. Jiang , D. L. Song , E. L. Qiao

We calculate the coupled thermal evolution and magnetic field decay in relativistic model neutron stars threaded by superstrong magnetic fields (B > 10^{15} G). Our main goal is to evaluate how such ``magnetars'' evolve with time and how…

天体物理学 · 物理学 2009-11-10 P. Arras , A. Cumming , C. Thompson

The Landau Fermi Liquid parameters are calculated for charge neutral asymmetric nuclear matter in beta equilibrium at zero temperature in the presence of a very strong magnetic field with relativistic mean-field models. Due to the isospin…

核理论 · 物理学 2015-05-27 M. A. Perez-Garcia , C. Providencia , A. Rabhi

Magnetars are a subclass of neutron stars whose intense soft-gamma-ray bursts and quiescent X-ray emission are believed to be powered by the decay of a strong internal magnetic field. We reanalyze neutrino emission in such stars in the…

天体物理学 · 物理学 2009-11-11 Mario Riquelme , Andreas Reisenegger , Olivier Espinosa , Claudio Dib

The nucleon-nucleon correlation between nucleons leads to the Fermi surface depletion measured by a $Z$-factor in momentum distribution of dense nuclear matter. The roles of the Fermi surface depletion effect ($Z$-factor effect) and its…

核理论 · 物理学 2021-01-19 J. M. Dong

We present numerical calculations of the equation of state for dense matter in high magnetic fields, using a temperature dependent Thomas-Fermi theory with a magnetic field that takes all Landau levels into account. Free energies for atoms…

天体物理学 · 物理学 2009-10-30 A. Thorolfsson , O. E. Rognvaldsson , J. Yngvason , E. H. Gudmundsson

In order to depict the quantization of Landau levels, we introduce Dirac $\delta$ function, and gain a concise expression for the electron Fermi energy, $E_{F}(e) \propto B^{1/4}$. The high soft X-ray luminosities of magnetars may be…

高能天体物理现象 · 物理学 2015-06-03 Qiu He Peng , Zhi Fu Gao , Na Wang

We discuss the effects of strong magnetic fields through Landau quantization of electrons on the structure and stability of nuclei in neutron star crust. In strong magnetic fields, this leads to the enhancement of the electron number…

高能天体物理现象 · 物理学 2015-05-20 Rana Nandi , Debades Bandyopadhyay

Some neutron stars known as magnetars possess very strong magnetic fields, with surface fields as large as $10^{15}\,\rm G$ and internal fields that are possibly stronger. Recent observations of the radio pulsar GLEAM-X J1627 suggest it may…

核理论 · 物理学 2025-03-04 Mia Kumamoto , Catherine Welch

Slow dissipation of non-potential magnetic fields in the magnetosphere of the magnetar is assumed to accelerate particles to hundreds MeV along the magnetic field lines. We consider interaction of fast particles with the surface of the…

天体物理学 · 物理学 2007-06-26 Yury Lyubarsky , David Eichler
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