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We study the effects of rotation on the torsional modes of oscillating relativistic stars with a solid crust. Earlier works in Newtonian theory provided estimates of the rotational corrections for the torsional modes and suggested that they…

General Relativity and Quantum Cosmology · Physics 2008-11-26 M. Vavoulidis , A. Stavridis , K. D. Kokkotas , H. Beyer

We study non-geodesic corrections to the quasicircular motion of charged test particles in the field of magnetized slowly rotating neutron stars. The gravitational field is approximated by the Lense-Thirring geometry, the magnetic field is…

High Energy Astrophysical Phenomena · Physics 2015-06-12 Pavel Bakala , Martin Urbanec , Eva Sramkova , Zdenek Stuchlik , Gabriel Torok

The existence of a large number of asymmetric, rotating neutron stars, each individually emitting periodic or quasi-periodic gravitational waves in the frequency band around 100 Hz, raises the possibility of detecting their combined…

Astrophysics · Physics 2007-05-23 Giacomo Giampieri

The electromagnetic instabilities excited by the temperature anisotropy have been always one of the interesting issues in real high-density physical systems, where the relativistic and quantum effects due to spin can be important. This…

Plasma Physics · Physics 2017-11-21 M. Mahdavi , H. Khanzadeh

We consider the interaction of a weak gravitational wave with electromagnetic fields in a thin plasma on a Minkowski background spacetime using the 1+3 orthonormal frame formalism. Because gravitational and electromagnetic waves satisfy the…

Astrophysics · Physics 2009-10-31 Mattias Marklund , Gert Brodin , Peter Dunsby

The rate of stimulated inverse bremsstrahlung is calculated for low electron density stellar plasmas and the condition under which the plasma becomes transparent is presented. The stability of low density stellar plasma is analyzed for a…

Solar and Stellar Astrophysics · Physics 2019-02-12 Y. Ben-Aryeh

In this paper we investigate the electrodynamic surface properties of bare strange quark stars. The surfaces of such objects are characterized by the formation of ultra-high electric surface fields which might be as high as $\sim 10^{19}$…

High Energy Astrophysical Phenomena · Physics 2010-12-23 Rodrigo Picanço Negreiros , Igor N. Mishustin , Stefan Schramm , Fridolin Weber

In this paper, we discuss the influence of the gravitational darkening effect on the emergent spectrum of a fast-rotating, flattened neutron star. Model atmosphere codes always calculate spectra of emergent intensities and fluxes emitted…

High Energy Astrophysical Phenomena · Physics 2022-02-16 A. Majczyna , J. Madej , A. Różańska , M. Należyty

Magnetic fluctuations in a non-magnetized gaseous plasma is revisited and calculated without approximations, based on the fluctuation-dissipation theorem. It is argued that the present results are qualitative and quantitative different form…

Cosmology and Nongalactic Astrophysics · Physics 2014-02-25 Francisco Caruso , Vitor Oguri

Because of physical processes ranging from microscopic particle collisions to macroscopic hydrodynamic fluctuations, any plasma in thermal equilibrium emits gravitational waves. For the largest wavelengths the emission rate is proportional…

High Energy Physics - Phenomenology · Physics 2015-08-06 J. Ghiglieri , M. Laine

The plasmon frequency in standard electron gases with a parabolic single-particle dispersion is a purely classical quantity that is not sensitive to electron interactions or the equation of state. We demonstrate that this canonical result…

Mesoscale and Nanoscale Physics · Physics 2019-12-25 Johannes Hofmann

By exploring the relationship between the propagation of electromagnetic waves in a gravitational field and the light propagation in a refractive medium, it is shown that, in the presence of a positive cosmological constant, the velocity of…

General Relativity and Quantum Cosmology · Physics 2007-05-23 W. R. Esposito Miguel , J. G. Pereira

Quasi-toroidal oscillations in slowly rotating stars are examined in the framework of general relativity. The oscillation frequency to first order of the rotation rate is not a single value even for uniform rotation unlike the Newtonian…

General Relativity and Quantum Cosmology · Physics 2009-10-30 Yasufumi Kojima

The collision frequencies of electron-neutral-particle in the weakly ionized complex plasmas with the non-Maxwellian velocity distributions are studied. The average collision frequencies of electron-neutral-particle in the plasmas are…

Plasma Physics · Physics 2021-08-31 Hong Wang , Jiulin Du , Rui Huo

The effect of spin of particles in the propagation of plasma waves is studied using a semi-classical kinetic theory for a magnetized plasma. We focus in the simple damping effects for the electrostatic wave modes besides Landau damping.…

Plasma Physics · Physics 2010-05-17 Pablo S. Moya , Felipe A. Asenjo

The generation of electron surface oscillations in overdense plasmas irradiated at normal incidence by an intense laser pulse is investigated. Two-dimensional (2D) particle-in-cell simulations show a transition from a planar, electrostatic…

Plasma Physics · Physics 2009-11-07 A. Macchi , F. Cornolti , F. Pegoraro , T. V. Liseikina , H. Ruhl , V. A. Vshivkov

The scattering of pointlike particles at very large center of mass energies and fixed low momentum transfers, occurring due to both their electromagnetic and gravitational interactions is re-examined in the particular case when one of the…

High Energy Physics - Theory · Physics 2009-10-28 Saurya Das , Parthasarathi Majumdar

In this paper we study radial oscillations of rotating strange stars in strong magnetic fields in the Density Dependent Quark Mass (DDQM) model. We see that increase of frequency i.e. difference in frequency of rotating and non-rotating…

Astrophysics · Physics 2007-05-23 S. Singh , N. Chandrika Devi , V. K. Gupta , Asha Gupta , J. D. Anand

Following the general formalism presented by Rezzolla, Ahmedov and Miller (MNRAS, 322, 723 2001), we here derive analytic solutions of the electromagnetic fields equations in the internal and external background spacetime of a slowly…

General Relativity and Quantum Cosmology · Physics 2007-05-23 L. Rezzolla , B. J. Ahmedov , J. C. Miller

The scattering of electromagnetic radiation by the particle gyrating in an external magnetic field is considered. Particular attention is paid to the low-frequency case, when the frequencies of incident radiation are much less than the…

Astrophysics · Physics 2009-11-13 S. A. Petrova