Nonlinear electrodynamic effect of ray bending in the magnetic-dipole field

Денисов, В И; Denisova, I. P.; Свертилов, С. И.

doi:10.1134/1.1415584

Cited by 24 publications

(34 citation statements)

References 5 publications

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“…When this Lagrangian is used to describe the photon dynamics the equations for the EM field in vacuum coincide in their form with the equations for a continuum medium in which the electric permittivity and magnetic permeability tensors αβ and µ αβ are functions of the electric and magnetic fields determined by some observer represented by its 4-vector velocity V µ [Denisov, Denisova & Svertilov, 2001a, 2001bDenisov & Svertilov, 2003;Mosquera Cuesta & Salim, 2004a, 2004b. The attentive reader must notice that this first order approximation is valid only for B-fields smaller than B q = m 2 c 3 eh = 4.41 × 10 13 G (Schwinger's critical B-field Schwinger (1951)).…”

Section: Heisenberg-euler Approachmentioning

confidence: 99%

Nonlinear Electrodynamics: Alternative Field Theory for Featuring Photon Propagation Over Weak Background Electromagnetic Fields and what Earth Receivers Read off Radio Signals from Interplanetary Spacecraft Transponders

Cuesta¹

2011

Advances in Spacecraft Technologies

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In this short voyage to the Pioneer 10 and 11 missions our main guide will be the comprehensive and richly documented recent review on the Pioneer Anomaly by [Turyshev, S. G. & Toth, V. T. (2010). Living Rev. Rel. 13 (2010) 4. arXiv:1001 from which we retake some ideas and references. (The attentive readers are kinldy addressed to this invaluable article). The Pioneer 10 and 11 spacecrafts were the first two man-made space vehicles designed to explore the outer solar system. The trajectories of the spaceships were projected to passage nearby Jupiter during 1972-1973 having as objectives to conduct exploratory investigation of the interplanetary medium beyond the orbit of Mars, the nature of the asteroid belt, the environmental and atmospheric characteristics of Jupiter and Saturn (for Pioneer 11), and to investigate the solar system beyond the orbit of the Jovian planet. 1 The Pioneer missions were the first space probes to adventure over the asteroid belt, heading for close-up observations of the gaseous giant planets, and for performing in situ studies of the physical properties of the interplanetary medium in the outer solar system. The design of their missions was guided by the simplicity, having a powerful rocket-launching system to push the spacecrafts on an hyperbolic trajectory aimed directly at Jupiter, which the spacecrafts were expected to fly-by approximately 21 months after launch (see Fig. 1). By the late 1960's, the aerospace engineering technology available to the designers of the Pioneer missions made it no longer practical to use solar panels for operating a spacecraft at large distances, as for instance that of Jupiter. A cause of this, a built-in nuclear power system, in the form of radioisotope thermoelectric generators (RTGs) powered by 238 Pu, was chosen as the means to provide electrical power to the spaceship. As even this was relatively new technology at the time the missions were designed, the power subsystem was suitably over-engineered, being the unique design requirement to have a completely functional space probe capable of performing all planned scientific tasks by running only three (out of four) RTGs. The entire design of these spacecrafts and their science missions was characterized by such conservative engineering, and for sure it was responsible for both the exceptional longevity of the two spacecrafts and their ability to deliver science results which by far exceeded the expectations of their designers. The original plan envisioned a primary mission of two to three years in duration. Nevertheless, following its encounter with Jupiter, Pioneer 10 remained functional for over 30 years. Meanwhile, Pioneer 11, though not as long lived as its engineering-copy craft, successfully navigated a path across the solar system for another encounter with Saturn, offering the first close-up observations of the ringed planet. After the encounters with Jupiter and Saturn (for Pioneer 11, see Fig. 1), the space ships followed, near the plane of the ecliptic, hyperbolic orbits of escape head...

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Section: Heisenberg-euler Approachmentioning

confidence: 99%

Nonlinear Electrodynamics: Alternative Field Theory for Featuring Photon Propagation Over Weak Background Electromagnetic Fields and what Earth Receivers Read off Radio Signals from Interplanetary Spacecraft Transponders

Cuesta¹

2011

Advances in Spacecraft Technologies

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“…The bending of light ray by gravitational field is a result of general relativity and is a useful tool in astrophysics through the gravitational lensing. The light bending can also happen when a light ray passes electric or magnetic field induced by astronomical objects through the nonlinear interaction of QED [11][12][13][14][15] . The shift of light velocity in a continuous medium is described by the index of refraction.…”

Section: Introductionmentioning

confidence: 99%

Non-gravitational deflection of light by a neutron star

Kim¹,

Lee²

2017

The Fourteenth Marcel Grossmann Meeting

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We address the bending of light when the quantum electrodynamic vacuum is modified by non-charge-like sources. The magnetic field of a neutron star can make a gradient for the index of refraction from the nonlinear electrodynamic effect. We calculate the bending angle when a light ray passes around a magnetized neutron star. We also calculate the bending of light by a black body radiation assuming that a neutron star is an isothermal black body. We estimate the order of magnitude for both bending angles and compare them with the bending angle by gravitation.

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“…Our results are here in disagreement with the conclusions of authors of ref. [8]. In any case, in a realistic astronomical case, the effects of accretion onto the NS of mass transferred from the companion will completely obliterate subtle effects of the type we are interested in.…”

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confidence: 99%

“…In ref. [8] it was concluded that a neutron star with a magnetic field of around 10 9 T could give a detectable effect.…”

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confidence: 99%

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Observing Quantum Vacuum Lensing in a Neutron Star Binary System

et al. 2005

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In this letter we study the propagation of light in the neighbourhood of magnetised neutron stars. Thanks to the optical properties of quantum vacuum in the presence of a magnetic field, light emitted by background astronomical objects is deviated, giving rise to a phenomenon of the same kind as the gravitational one. We give a quantitative estimation of this effect and we discuss the possibility of its observation. We show that this effect could be detected by monitoring the evolution of the recently discovered double neutron star system J0737-3039. PACS numbers: Keywords:Neutron stars have been intensively studied since their discovery as pulsars, i.e. stars with a magnetic dipole field tilted with respect to their rotation axis, emitting radio waves along their dipole axis as the star spins [1]. Typically their mass is on the order of that of the Sun, and their radius of the order of 10 km. Their spinning period ranges from tens of milliseconds for young stars to seconds, decreasing with star age. The magnetic field of neutron stars can be as high as 10 11 T as in the case of magnetars [2] while magnetic fields of the order of 10 8 − 10 9 T are more common. Most of the known pulsars are isolated stars, less than 100 are known to be in binary systems with non-degenerate stars, few (∼ 5) are in neutron star-neutron star binary systems. Very recently, a specially interesting NS-NS system (J0737-3039) has been discovered [3].On the other hand, it is known that quantum vacuum is a non linear optical medium [4]. In the seventies it was clearly pointed out [5] that the velocity of light propagating in a quantum vacuum in the presence of a magnetic field changes of a quantity which depends on the polarization of light with respect to the magnetic field direction. Those calculations were prompted by early speculations that neutron stars could be a source of very intense magnetic fields. Since then, most authors have been interested in how the magnetic field can affect the propagation of radiation emitted by the neutron star itself [7].In this letter we investigate the case of radiation emitted by another astronomical object passing close enough to the NS to be significantly affected by its magnetic field. The case in point will be seen to be that of J0737, especially in the context of its orbital evolution.In the vicinity of a NS, owing to the optical properties of quantum vacuum in the presence of a magnetic field, light emitted by astronomical sources is deviated, giving rise to a phenomenon of the same kind as the gravitational one predicted by general relativity. We first prove that fields of the order of 10 9 T are not sufficient to give an effect big enough to be detected in the case of isolated NS or in the case of NS-non-degenerate star systems. On the other hand we show that quantum vacuum effect could be observed by monitoring the evolution of the recently discovered NS-NS system J0737-3039.It is known that light generally bends towards regions with a higher index of refraction [6]. Because of refraction ind...

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Nonlinear electrodynamic effect of ray bending in the magnetic-dipole field

Cited by 24 publications

References 5 publications

Nonlinear Electrodynamics: Alternative Field Theory for Featuring Photon Propagation Over Weak Background Electromagnetic Fields and what Earth Receivers Read off Radio Signals from Interplanetary Spacecraft Transponders

Nonlinear Electrodynamics: Alternative Field Theory for Featuring Photon Propagation Over Weak Background Electromagnetic Fields and what Earth Receivers Read off Radio Signals from Interplanetary Spacecraft Transponders

Non-gravitational deflection of light by a neutron star

Observing Quantum Vacuum Lensing in a Neutron Star Binary System

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