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We consider the system of massive electrons, possessing nonzero anomalous magnetic moments, which electroweakly interact with background neutrons under the influence of an external magnetic field. The Dirac equation for such electrons is…

高能天体物理现象 · 物理学 2017-12-27 Maxim Dvornikov

In order to discern the physical nature of many gamma-ray sources in the sky, we must look not only in spectral and spatial dimensions, but also understand their temporal variability. However, timing analysis of sources with a highly…

Prompt {\gamma}-ray emissions from gamma-ray bursts (GRBs) exhibit a vast range of extremely complex temporal structures with a typical variability time-scale significantly short - as fast as milliseconds. This work aims to investigate the…

高能天体物理现象 · 物理学 2011-09-28 G. Greco , R. Rosa , G. Beskin , S. Karpov , L. Romano , A. Guarnieri , C. Bartolini , R. Bedogni

Nuclear burning and its dependence on the mass accretion rate are fundamental ingredients for describing the complicated observational phenomenology of neutron stars in binary systems. Motivated by high quality burst rate data emerging from…

高能天体物理现象 · 物理学 2017-12-20 Yuri Cavecchi , Anna L. Watts , Duncan K. Galloway

Magnetic reconnection is a sporadic process responsible for energy release in space and laboratory plasmas. It is believed that the tearing mode instability may be responsible for the onset of reconnection in the magnetotail. However, due…

Magnetars are fascinating objects that are thought to be neutron stars powered by their strong internal magnetic fields. Clear evidence of a sudden spin-down was detected in the Anomalous X-ray Pulsar AXP 1E 2259+586, an object cataloged as…

高能天体物理现象 · 物理学 2015-03-13 Ignacio F. Ranea-Sandoval , Federico García

A differentially rotating hypermassive neutron star (HMNS) is a metastable object which can be formed in the merger of neutron-star binaries. The eventual collapse of the HMNS into a black hole is a key element in generating the physical…

广义相对论与量子宇宙学 · 物理学 2013-07-18 Daniel M. Siegel , Riccardo Ciolfi , Abraham I. Harte , Luciano Rezzolla

Mountains on rapidly rotating neutron stars efficiently radiate gravitational waves. The maximum possible size of these mountains depends on the breaking strain of neutron star crust. With multi-million ion molecular dynamics simulations of…

太阳与恒星天体物理 · 物理学 2009-06-30 C. J. Horowitz , Kai Kadau

A relativistic degenerate neutron gas in equilibrium with a background of electrons and protons in a magnetic field exerts its pressure anisotropically, having a smaller value perpendicular than along the magnetic field. For critical fields…

天体物理学 · 物理学 2009-01-07 A. Perez Martinez , H. Perez Rojas , H. J. Mosquera Cuesta

Magnetars, which are neutron stars with strong magnetic fields, exhibit occasional bursting activities. The shape of a magnetar is not perfectly spherical due to the Lorentz force exerted by its strong magnetic fields and is described as a…

高能天体物理现象 · 物理学 2024-07-30 Tomoki Wada , Jiro Shimoda

The role of magnetic field decay in normal radio pulsars is still debated. In this paper we present results which demonstrate that an episode of magnetic field decay in hot young neutron stars can explain anomalous values of braking indices…

高能天体物理现象 · 物理学 2021-03-31 A. P. Igoshev , S. B. Popov

Fast radio bursts are millisecond-duration radio pulses of extragalactic origin. A recent statistical analysis has found that the burst energetics of the repeating source FRB 121102 follow a power-law, with an exponent that is curiously…

高能天体物理现象 · 物理学 2019-08-20 Arthur G. Suvorov , Kostas D. Kokkotas

It is suggested that magnetars eventually become unstable to a dynamic overturning instability that destroys most of their dipole moment in a single event. It is further suggested that such an instability would produce a supergiant version…

天体物理学 · 物理学 2009-11-07 David Eichler

Observations of powerful radio waves from neutron star magnetospheres raise the question of how strong waves interact with particles in a strong background magnetic field $B_{bg}$. This problem is examined by solving the particle motion in…

高能天体物理现象 · 物理学 2022-07-13 Andrei M. Beloborodov

Neutron stars or pulsars are very rapidly rotating compact stars with extremely high density. One of the unsolved long-standing problems of these enigmatic celestial bodies is the origin of pulsars' glitches, i.e., the sudden rapid…

高能天体物理现象 · 物理学 2020-10-20 Giacomo Marmorini , Shigehiro Yasui , Muneto Nitta

The pattern of variations in the intensity of magnetodipole losses is studied with the relativistic effect of magnetic-field dissipation during collapse into a black hole taken into account. A burst-type solution can be obtained both for a…

天体物理学 · 物理学 2007-05-23 Galina V. Lipunova

The rapidly growing base of observational data for supernova explosions of massive stars demands theoretical explanations. Central of these is a self-consistent model for the physical mechanism that provides the energy to start and drive…

天体物理学 · 物理学 2009-11-07 H. -Th. Janka , R. Buras , K. Kifonidis , T. Plewa , M. Rampp

We present three-dimensional force-free electrodynamics simulations of magnetar magnetospheres that demonstrate the instability of certain degenerate, high energy equilibrium solutions of the Grad-Shafranov equation. This result indicates…

高能天体物理现象 · 物理学 2019-11-26 J. F. Mahlmann , T. Akgün , J. A. Pons , M. A. Aloy , P. Cerdá-Durán

We report here on recent progress in understanding the birth conditions of neutron stars and the way how supernovae explode. More sophisticated numerical models have led to the discovery of new phenomena in the supernova core, for example a…

天体物理学 · 物理学 2009-06-23 H. -Th. Janka , A. Marek , B. Mueller , L. Scheck

The magnetar magnetosphere is gradually twisted by shearing from footpoint motion, and stored magnetic energy also increases at the same time. When a state exceeds a threshold, flares/outbursts manifest themselves as a result of a…

高能天体物理现象 · 物理学 2018-04-25 Yasufumi Kojima
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