General Relativistic Electrodynamics and Pulsar Theory

1996 ◽  
Vol 160 ◽  
pp. 417-420
Author(s):  
L. Mestel
Keyword(s):  
Charge Density ◽  
Inertial Frames ◽  
General Relativistic ◽  
Relativistic Electrodynamics

AbstractMuslimov & Tsygan (1986, 1990, 1991, 1992) have shown how the dragging of inertial frames modifies the Goldreich-Julian charge density. The consequences are noted for different models of the electron outflow near the neutron star’s surface.

scholarly journals General Relativistic Electrodynamics of the Magnetic Polar Regions of Neutron Stars

1992 ◽  
Vol 128 ◽  
pp. 248-251
Author(s):  
A. G. Muslimov ◽  
A. I. Tsygan
Keyword(s):  
Neutron Star ◽  
Electric Fields ◽  
Polar Regions ◽  
Strong Component ◽  
Radio Pulsars ◽  
Inertial Frames ◽  
Magnetic Field Region ◽  
General Relativistic ◽  
Relativistic Electrodynamics ◽  
Open Magnetic Field

AbstractThe induction of the electric fields near a rotating neutron star is considered within the framework of General Relativity. It is demonstrated that within the open magnetic field region, filled by relativistically moving charged particles, a sufficiently strong component of the electric field is generated. This component is due to the effect of dragging of inertial frames of reference and predominates in the case when a neutron star is not exactly an orthogonal rotator. Finally, we discuss some implications of our results on the theory of radio pulsars.

scholarly journals General Relativistic Description of Celestial Reference Frames

1990 ◽  
Vol 141 ◽  
pp. 111-114
Author(s):  
A. V. Voinov
Keyword(s):  
Reference Frames ◽  
Reference Systems ◽  
Practical Application ◽  
Theoretical Methods ◽  
Relativistic Transformation ◽  
The Earth ◽  
Inertial Frames ◽  
General Relativistic ◽  
Relativistic Description ◽  
Transformation Functions

The astonomical consequences of recently developed theoretical methods of relativistic astrometry are discussed. The set of practically important reference systems is described. These reference systems generalize the locally inertial frames of general relativistic test observer, the hierarchy of Jacoby coordinates for dynamical problems and the dynamically inertial reference systems of fundamental astrometry. In practical application of this formalism much attention is paid for relativistic transformation functions relating the ∗∗ecliptical coordinates corresponding to the baryecnters of the Solar system, the Earth-Moon subsystem and the Earth. Solutions to several kinds of relativistic precession are also presented.

scholarly journals ELECTROMAGNETIC EFFECTS IN SUPERCONDUCTORS IN STATIONARY GRAVITATIONAL FIELD

2005 ◽  
Vol 14 (05) ◽  
pp. 837-847 ◽  
Author(s):  
B. J. AHMEDOV ◽  
V. G. KAGRAMANOVA
Keyword(s):  
Gravitational Field ◽  
Magnetic Flux ◽  
Superconducting Devices ◽  
Resistive State ◽  
Superconducting Cylinder ◽  
Inertial Frames ◽  
Radial Heat ◽  
General Relativistic ◽  
Shift Effect ◽  
Stationary Gravitational Field

The general relativistic modifications to the resistive state in superconductors of second type in the presence of a stationary gravitational field are studied. Some superconducting devices that can measure the gravitational field by its red-shift effect on the frequency of radiation are suggested. It has been shown that by varying the orientation of a superconductor with respect to the earth gravitational field, a corresponding varying contribution to AC Josephson frequency would be added by gravity. A magnetic flux (being proportional to angular velocity of rotation Ω) through a rotating hollow superconducting cylinder with the radial gradient of temperature ∇rT is theoretically predicted. The magnetic flux is assumed to be produced by the azimuthal current arising from Coriolis force effect on radial thermoelectric current. Finally the magnetic flux through the superconducting ring with radial heat flow located at the equatorial plane interior of the rotating neutron star is calculated. In particular it has been shown that nonvanishing magnetic flux will be generated due to the general relativistic effect of dragging of inertial frames on the thermoelectric current.

Relativistic electrodynamics of dissipative elastic media

1980 ◽  
Vol 58 (5) ◽  
pp. 666-682 ◽  
Author(s):  
Miroslav Kranyš
Keyword(s):  
Constitutive Equations ◽  
Elastic Solid ◽  
Stationary Regime ◽  
Momentum Tensor ◽  
Elastic Media ◽  
Free Energy Function ◽  
Equations Of Electrodynamics ◽  
Entropy Principle ◽  
General Relativistic ◽  
Relativistic Electrodynamics

A phenomenological general relativistic electrodynamics is proposed for a dissipative elastic solid which is polarizable and magnetizable and whose governing equations form a hyperbolic system. Non-stationary transport equations are proposed for dissipative fluxes (and constitutive equations of electrodynamics) containing new cross-effect terms, as required for compatibility with an entropy principle expressed by a new balance equation (including a new Gibbs equation). The dynamic equations are deduced from the unified Minkowski–Abraham–Eckart energy-momentum tensor. The theory, formed by a set of 29 (reducible to 23) partial differential equations (in special relativity) governing the material behaviour of the system characterized by generalizing the constitutive equations of quasineutral media, together with Maxwell's equations, may be referred to as the electrodynamics of dissipative elastic media (or fluid). The proposed transport laws for polarization and magnetization generalize the well-known Debye law for relaxation and show the influence of shear and bulk viscosity on polarization and magnetization. Besides the form of the entropy function, the free energy function in the non-stationary régime is also formulated.

scholarly journals Emission of particles and photons in the pulsar polar cap

2000 ◽  
Vol 177 ◽  
pp. 473-478
Author(s):  
A. I. Tsygan
Keyword(s):  
Gamma Ray ◽  
Radio Pulsars ◽  
Polar Cap ◽  
X Ray ◽  
Polar Caps ◽  
Electron Positron ◽  
Inertial Frames ◽  
General Relativistic ◽  
Star Surface ◽  
General Relativistic Effect

AbstractWe study emission of particles and photons from a pulsar polar cap. The Goldreich-Julian model for the regime of free emission of charged particles from the neutron star surface is used. In this case the electric field is generated due to the general relativistic effect of dragging of inertial frames. The spectra and shapes of gamma-ray pulses, the parameters of the electron-positron plasma and the intensity of X-ray emission from hot spots in the polar region of radio pulsars are discussed. The effect of non-dipole magnetic field on X-ray emission of polar caps is considered. It is shown that the increase of magnetic line curvature leads to much smaller temperatures and X-ray luminosities of the polar caps as compared with the purely dipole field.

scholarly journals Spontaneous Wave Function Collapse with Frame Dragging and Induced Gravity

2019 ◽  
Vol 1 (2) ◽  
pp. 277-286
Author(s):  
Lajos Diósi
Keyword(s):  
Wave Function ◽  
Momentum Conservation ◽  
Induced Gravity ◽  
Frame Dragging ◽  
Stochastic Schrödinger Equation ◽  
Stochastic Fluctuations ◽  
Inertial Frames ◽  
General Relativistic ◽  
Cat States ◽  
Collapse Process

I impose the Newtonian criteria of inertial frames on the c.o.m.trajectories of massive objects undergoing spontaneous collapse of their wave function. The corresponding modification of the so far used stochastic Schrödinger equation eliminates the Brownian motion of the c.o.m., and restores the exact inertial motion for free masses. For the collapse of Schrödinger cat states the Born rule is satisfied invariably. The proposed machinery comes from the radical assumption that, in the vicinity of the spontaneously localized mass, the stochastic fluctuations of the c.o.m.—inevitable in the collapse process—would drag the physical inertial frame with themselves. The perspective of a general theory is presented where the spontaneous-collapse-caused breakdown of local energy-momentum conservation could be remedied by altering the metric, resulting in collapse-induced curvature of the space-time. My assumption of frame-drag by quantized masses is independent of the general relativistic frame-drag by classical masses.

Dragging of inertial frames by matter and waves

2021 ◽  
Author(s):  
Jiří Bičák ◽  
Tomáš Ledvinka
Keyword(s):  
Black Holes ◽  
Perturbation Theory ◽  
Inertial Frame ◽  
Cosmological Perturbation ◽  
Cosmological Perturbation Theory ◽  
Frame Dragging ◽  
Inertial Frames ◽  
Rotating Black Holes ◽  
Quantum Detection ◽  
General Relativistic

In this paper, we review and analyze four specific general-relativistic problems in which gravitomagnetism plays an important role: the dragging of magnetic fields around rotating black holes, dragging inside a collapsing slowly rotating spherical shell of dust, compared with the dragging by rotating gravitational waves. We demonstrate how the quantum detection of inertial frame dragging can be accomplished by using the Unruh–DeWitt detectors. Finally, we shall briefly show how “instantaneous Machian gauges” can be useful in the cosmological perturbation theory.

scholarly journals Dragging of inertial frames in the composed black-hole-particle system and the weak cosmic censorship conjecture

2020 ◽  
Vol 80 (7) ◽  
Author(s):  
Shahar Hod
Keyword(s):  
Black Hole ◽  
Particle System ◽  
Particle Interaction ◽  
Kerr Black Hole ◽  
Cosmic Censorship ◽  
Spinning Particle ◽  
Gedanken Experiment ◽  
Inertial Frames ◽  
General Relativistic ◽  
Cosmic Censorship Conjecture

Abstract We analyze a gedanken experiment in which a spinning particle that also possesses an extrinsic orbital angular momentum is captured by a spinning Kerr black hole. The gravitational spin-orbit interaction decreases the energy of the particle, thus allowing one to test the validity of the Penrose weak cosmic censorship conjecture in extreme situations that have not been analyzed thus far. It is explicitly shown that, to leading order in the black-hole-particle interactions, the linearized test particle can over-spin the black hole, thus exposing its inner spacetime singularity to external observers. However, we prove that the general relativistic effect of dragging of inertial frames by the orbiting particle contributes to the energy budget of the system a non-linear black-hole-particle interaction term that ultimately ensures the validity of the Penrose cosmic censorship conjecture in this type of gedanken experiments.

scholarly journals Rotation curves, dark matter and general relativity

2006 ◽  
Vol 2 (S238) ◽  
pp. 401-402
Author(s):  
Patricio S. Letelier
Keyword(s):  
General Relativity ◽  
Dark Matter ◽  
Magnetic Monopole ◽  
Exotic Matter ◽  
Circular Orbits ◽  
Rotation Curves ◽  
Inertial Frames ◽  
Galaxy Disk ◽  
General Relativistic ◽  
Relativistic Models

AbstractWe study the possibility of pure general relativistic models without exotic matter to describe the observed flattening of the rotation curves for stars moving in circular orbits in a galaxy disk. In particular we consider the dragging of inertial frames (rotation of the source) and the presence of a Taub–NUT (Newman–Unti–Tamburino) “charge”, the gravitational equivalent to a magnetic monopole in electrodynamics.

Einstein’s special relativity violates the constancy of the velocity c of light under one-way conditions and thus contradicts the behavior of electromagnetic radiation

2021 ◽  
Vol 34 (3) ◽  
pp. 274-278
Author(s):  
Reiner Georg Ziefle
Keyword(s):  
Electromagnetic Radiation ◽  
Coordinate System ◽  
Special Relativity ◽  
Reference Frames ◽  
Inertial Frame ◽  
Theory Of Relativity ◽  
Length Contraction ◽  
Relativistic Time ◽  
Inertial Frames ◽  
General Relativistic

On Earth, we always measure the constant velocity c of electromagnetic radiation. Einstein assumed the velocity c of light to be constant in all inertial frames and developed his theory of special relativity by considering a light beam that moves back and forth, whereby he derived transformations between the coordinates of two reference frames: A moving reference frame represented by the coordinate system k and the coordinate system k that is at rest with respect to k. However, by applying Einstein’s theory of relativity, with its postulates of relativistic time dilation and length contraction, to electromagnetic radiation that moves only in one direction, either in the direction of or in the opposite direction to a moving inertial frame, it is demonstrated that the constancy of the velocity c of light is not compatible with Einstein’s theory of special relativity. It becomes obvious that Einstein’s relativistic physics must be an unrealistic theory, and consequently, we need an alternative, nonrelativistic, explanation of the constancy of the velocity c of electromagnetic radiation measured on Earth, and for the special and general “relativistic” phenomena.

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