Gravitomagnetism and the Clock Effect

Mashhoon, Bahram; Gronwald, Frank; Lichtenegger, Herbert

doi:10.1007/3-540-40988-2_5

Cited by 111 publications

(136 citation statements)

References 40 publications

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“…The tests with the Mars Global Surveyor (MGS) spacecraft and Mars [18][19][20][21], and the Sun-planets scenario [22][23][24][25][26][27] will be left aside as well; a recent, comprehensive overview can be found in [28]. Another general relativistic orbital effect caused by the rotation of a central body is the so-called gravitomagnetic clock effect [29][30][31][32][33][34]. It affects the orbital periods of two counter-rotating test particles along otherwise identical trajectories in such a way that if one of them revolves in the same direction as the primary spins, it takes longer time to describe a full orbital revolution, whereas the orbital period of the other one gets shorter if it moves oppositely with respect to the body's rotation.…”

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confidence: 99%

History of the attempts to measure orbital frame-dragging with artificial satellites

Renzetti¹

2013

Open Physics

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confidence: 99%

History of the attempts to measure orbital frame-dragging with artificial satellites

Renzetti¹

2013

Open Physics

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“…Using Eqs. (9), (15), (16), and (17) and analogy with Maxwell's equations, we get the gravitoelectromagnetic field equations [24] …”

Section: A Gravitoelectromagnetismmentioning

confidence: 99%

Orbital motion and quasi-quantized disk around rotating neutron stars

Wang

Chang

2014

Int. J. Mod. Phys. D

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In accreting neutron star (NS) low-mass X-ray binary (LMXB) systems, NS accretes material from its low-mass companion via a Keplerian disk. In a viscous accretion disk, inflows orbit the NS and spiral in due to dissipative processes, such as the viscous process and collisions of elements. The dynamics of accretion flows in the inner region of an accretion disk is significantly affected by the rotation of NS. The rotation makes NS, thus the space-time metric, deviate from the originally spherical symmetry, and leads to gravitational quadrupole, on one hand. On the other hand, a rotating NS drags the local inertial frame in its vicinity, which is known as the rotational framedragging effect. In this paper, we investigate the orbital motion of accretion flows of accreting NS/LMXBs and demonstrate that the rotational effects of NS result in a band of quasi-quantized structure in the inner region of the accretion disk, which is different, in nature, from the scenario in the strong gravity of black hole arising from the resonance for frequencies related to epicyclic and orbital motions. We also demonstrate that such a disk structure may account for frequencies seen in X-ray variability, such as quasi-periodic oscillations, and can be a potential promising tool of investigation for photon polarization.

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“…An example of already a decade old publication on this topic is the paper authored by Ruggiero and Tartaglia (2002). Another review of the concept was published earlier by Mashhoon, Gronwald, and Lichtenegger (1999). A more sophisticated version of the derivation was published by Clark and Tucker (2000), and even NASA (2004), which has dedicated a significant effort and resources to the detection of gravitomagnetic force, has a webpage on this subject.…”

Section: Introductionmentioning

confidence: 99%

The Questionable Existence of Gravitomagnetic Force

Hynecek¹

2013

APR

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Using a simple model of moving massive parallel plates this paper explains that there cannot be any gravitomagnetic force contrary to a widely spread belief that such a force exists. The existence of this force is usually supported by the analogy with the Maxwell theory of Electromagnetic fields. The gravitomagnetic force, analogous to a force described by the Lorentz force equation, and the accompanied gravitoelectromagnetic field equations, are all derived from Einstein field equations by linearization for the weak gravitational field. The derivation presented in this paper offers a clear reason for the nonexistence of the gravitomagnetic field and therefore also questions the validity of Einstein field equations.Keywords: gravitomagnetic force, Einstein field equations, Maxwell field equations, Lorentz force equation, field energy of charged parallel plates, field energy of massive parallel plates, potential field energy, kinetic field energy

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Gravitomagnetism and the Clock Effect

Cited by 111 publications

References 40 publications

History of the attempts to measure orbital frame-dragging with artificial satellites

History of the attempts to measure orbital frame-dragging with artificial satellites

Orbital motion and quasi-quantized disk around rotating neutron stars

The Questionable Existence of Gravitomagnetic Force

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