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The electromagnetic field in a magnetized neutron star and the underlying volume charges and currents are found. A general case of a rigidly rotating neutron star with infinite conductivity, arbitrary distribution of the internal magnetic…

High Energy Astrophysical Phenomena · Physics 2016-12-30 D. N. Sob'yanin

Electromagnetic field together with zero-mass charges moving in this field form a well-behaved semi-dissipative dynamical system -- Electrodynamics of Massless Charges (EMC). We give equations of EMC, argue that EMC is an adequate theory…

High Energy Astrophysical Phenomena · Physics 2012-05-16 Andrei Gruzinov

Neutron stars are compact objects rotating at high speed, up to a substantial fraction of the speed of light (up to 20\% for millisecond pulsars) and possessing ultra-strong electromagnetic fields (close to and sometimes above the quantum…

High Energy Astrophysical Phenomena · Physics 2020-01-13 Jérôme Pétri

The 1974 discovery, by Russell A. Hulse and Joseph H. Taylor, of the first binary pulsar PSR B1913+16, opened up new possibilities for the study of relativistic gravity. PSR B1913+16, as well as several other binary pulsars, provided {\it…

General Relativity and Quantum Cosmology · Physics 2015-06-17 Thibault Damour

The calculation presented in "A neoclassical calculation of rotation profiles and comparison with DIII-D measurements" by Stacey, Johnson, and Mandrekas, [Physics of Plasmas, 13, (2006)], contains several errors, including the neglect of…

Plasma Physics · Physics 2011-01-11 Robert W. Johnson

Pulsars have now been studied for 34 years. We know of the existence of some 1500 objects at radio frequencies. Many of the characteristics of pulsars such as pulsar period, period derivative, spectrum, polarization, etc., have been…

Astrophysics · Physics 2007-05-23 Richard Wielebinski

The main contribution to the pulsar power can be calculated by assuming a rotating magnetically-dominated magnetosphere described by the force-free approximation. Although this simple model has been used thoroughly to study pulsar…

High Energy Astrophysical Phenomena · Physics 2018-07-18 Federico Carrasco , Carlos Palenzuela , Oscar Reula

We revisit particle acceleration in the polar cap region of a neutron star by taking into account both general relativistic effects and the presence of toroidal oscillations at the star surface. In particular, we address the question of…

High Energy Astrophysical Phenomena · Physics 2015-03-11 Olindo Zanotti , Viktoriya Morozova , Bobomurat Ahmedov

Before the 1970s, precision tests for gravity theories were constrained to the weak gravitational fields of the Solar system. Hence, only the weak-field slow-motion aspects of relativistic celestial mechanics could be investigated. Testing…

General Relativity and Quantum Cosmology · Physics 2014-04-16 Norbert Wex

There are now at least eight experiments extending over more than 100 years that have detected the anisotropy of the speed of light, implying the absolute motion of the detecting apparatus through a dynamical space. This light-speed…

General Physics · Physics 2007-05-23 Reginald T Cahill

The non-linear electrodynamics influence of pulsar magnetic field on the electromagnetic pulse polarization is discussed from the point of observation interpretation. The calculations of pulsar magnetic field impact on electromagnetic pulse…

High Energy Astrophysical Phenomena · Physics 2017-09-13 V. I. Denisov , V. A. Sokolov , S. I. Svertilov

In the present work we investigate one possible variation on the usual static pulsars: the inclusion of rotation. We use a formalism proposed by Hartle and Thorne to calculate the properties of rotating pulsars with all possible…

Astrophysics · Physics 2009-06-23 M. D. Alloy , D. P. Menezes

A recent phenomenological study of radio emission from normal and millisecond pulsars by Karastergiou et al has lead these authors to state that they are unable to exclude a common physics process as the source although the rotation periods…

High Energy Astrophysical Phenomena · Physics 2024-11-28 P B Jones

Following the early paper of Goldreich & Julian (1969), polar-cap models have usually assumed that the closed sector of a pulsar magnetosphere corotates with the neutron star. Recent work by Melrose & Yuen has been a reminder that in an…

High Energy Astrophysical Phenomena · Physics 2015-09-09 P. B. Jones

Rotation-powered pulsars are excellent laboratories for study of particle acceleration as well as fundamental physics of strong gravity, strong magnetic fields, high densities and relativity. I will review the outstanding questions in…

Astrophysics · Physics 2009-06-23 Alice K. Harding

The classical theory of single-electron dynamics in focused laser pulses is the foundation of both the relativistic ponderomotive force (RPF), which in turn underlies models of laser-collective-plasma dynamics, and the discovery of novel…

Plasma Physics · Physics 2020-09-03 B. Manuel Hegelich , Lance Labun , Ou Z. Labun

We sketch the foundations of classical electrodynamics, in particular the transition that took place when Einstein, in 1915, succeeded to formulate general relativity. In 1916 Einstein demonstrated that, with a choice of suitable variables…

Classical Physics · Physics 2011-07-19 Friedrich W. Hehl , Yuri N. Obukhov

Standard formulae of classical electromagnetism for the forces between electric charges in motion derived from retarded potentials are compared with those obtained from a recently developed relativistic classical electrodynamic theory with…

Classical Physics · Physics 2009-11-11 J. H. Field

The number of pulsars with detected emission at X-ray and gamma-ray energies has been steadily growing, showing that beams of high-energy particles are commonly accelerated in pulsar magnetospheres, even though the location and number of…

Astrophysics · Physics 2009-11-11 Isabelle A. Grenier , Alice K. Harding

We consider the electrodynamics of in-spiraling binary pulsars, showing that there are two distinct ways in which they may emit radiation. On the one hand, even if the pulsars do not rotate, we show that in vacuo orbital rotation generates…

High Energy Astrophysical Phenomena · Physics 2015-06-24 Emanuele Sobacchi , Mario Vietri