Resonant cyclotron scattering

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August undefined, 2024

WebWe present a systematic fit of a model of resonant cyclotron scattering (RCS) to the X-ray data of 10 magnetars, including canonical and transient anomalous X-ray pulsars (AXPs) and soft gamma repeaters (SGRs). In this scenario, nonthermal magnetar spectra in the soft X-rays (i.e., below ~10 keV) result from resonant cyclotron scattering of the thermal … WebAug 14, 2006 · The charges supporting these currents supply a significant optical depth to resonant cyclotron scattering in the 1-100 keV band. Here we describe a Monte Carlo approach to calculating the redistribution of thermal seed photons in frequency and angle …

Resonant cyclotron scattering and Comptonization in …

WebMar 1, 2024 · This paper reviews the main microwave diagnostic techniques and tools adopted in electron cyclotron resonance (ECR) (and others) ion source laboratories, with a special focus on techniques and instruments developed at INFN-LNS. Along with the tools used for optimization of microwave launching (power … WebThis paper examines two wave-particle interactions which are likely to be important for producing pitch-angle scattering. These are cyclotron-resonance scattering by whistler-mode disturbances and bounce-resonance scattering by disturbances having electric- or … i\u0027m writing this letter to

Variations of cyclotron resonant scattering features in Vela X-1 ...

WebAlthough the surface of a magnetar is a source of bright thermal X-rays, its spectrum contains substantial non-thermal components. The X-ray emission is pulsed, with pulsed fractions that can be as high as . Several pr… WebDec 19, 2008 · The charges supporting these currents supply a significant optical depth to resonant cyclotron scattering in the 1-100 keV band. Here we describe a Monte Carlo approach to calculating the redistribution of thermal seed photons in frequency and angle … WebFeb 13, 2008 · In this scenario, non-thermal magnetar spectra in the soft X-rays (i.e. below ~10 keV) result from resonant cyclotron scattering of the thermal surface emission by hot magnetospheric plasma. We find that this model can successfully account for the soft X … i\u0027m writing to follow up on

Bounce Resonance Scattering of Radiation Belt Electrons by Low

Resonant Cyclotron Scattering in Three Dimensions and the …

WebJun 26, 2012 · Resonant cyclotron scattering of the surface radiation in the magnetospheres of neutron stars may considerably modify the emergent spectra and impede efforts to constrain neutron star properties. WebCyclotron Resonant Scattering and Absorption. The relativistic cross-sections for first-order absorption and second-order scattering are compared to determine the conditions under which the absorption cross-section is a good approximation to the much more complex … i\u0027m writing to invite youWebThis dominance of bounce resonance in scattering ≥ 1 MeV electrons is found to be more pronounced at higher L shells due to the stronger bounce resonant scattering rates. Furthermore, Figure 4 illustrates that cyclotron resonance driven pitch angle scattering of … networkauthclient

"WebJun 20, 1991 · Cyclotron resonant scattering and absorption The relativistic cross-sections for first-order absorption and second-order scattering are compared to determine the conditions under which the absorption cross-section is a good approximation to the much … " - Resonant cyclotron scattering

Resonant cyclotron scattering

Spectral Modification of Magnetar Flares by Resonant Cyclotron …

WebApr 20, 2024 · Spectral modification of energetic magnetar flares by resonant cyclotron scattering (RCS) is considered. During energetic flares, photons emitted from the magnetically-trapped fireball near the stellar surface should resonantly interact with …

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WebA typical time resolution is Thomson scattering diagnostic finally succeeded in producing 35 µs and it is observed that the electron density is pumped the preliminary results by increasing ... Jeon Y.M. et al 2012 Phys. Rev. Lett. 109 035004 Cyclotron Emission and Electron Cyclotron Resonance [17] Park J .K., Boozer A.H. and Menard ... WebApr 12, 2024 · Abstract When assessing the scattering of radiation belt electrons by fast magnetosonic ... It is found that the kinetic effects lead to a lower minimum resonant energy around 100 eV and a broader resonant pitch angle range. ... Ω σ is the cyclotron frequency with the sign of charge, ...

WebApr 10, 2024 · Abstract Averaged equations and 3D particle-in-cell modeling are used to examine the frequency multiplication regime in a high-current relativistic gyrotron operating in the 0.1 THz band of frequencies. It is shown that the ratio of the 3rd harmonic power output and the fundamental cyclotron resonance power can be as high as 0.4–0.8%, … WebApr 12, 2024 · Cyclotron resonance can result in the absorption of R-mode photons at a low altitude region of the magnetosphere, and an FRB should then be emitted from a high-altitude region if the waves have ...

WebJan 20, 2024 · We find that scattering by ion cyclotron waves is crucially important to relativistic electron losses in Saturn's radiation belt. 2 Methodology ... This is because the cyclotron-resonant energy of radiation belt electrons due to L-mode waves decreases … WebThe resonant cyclotron scattering (RCS) may well be a plausible process that can help to explain the observed spectra of energetic magnetar flares. Magnetars emit mostly in the X-ray band so that close to their surface, the cyclotron frequency well exceeds the radiation …

WebOct 21, 2008 · The scattering efficiency is quantified by the resonant optical depth, tau_{res}, which is related to the electron density (assumed to be constant through the scattering slab). The RCS model is based on a simplified, 1D semi-analytical treatment of resonant …

WebWang, J. C. L., Lamb, D. Q., Loredo, T. J., Wasserman, I. M., Salpeter, E. E., Fenimore, E. E., … Kondo, I. (1989). Cyclotron resonant scattering in the spectra ... i\u0027m writing you or to youWebApr 5, 2006 · Resonant cyclotron scattering and Comptonization in neutron star magnetospheres 1 INTRODUCTION. The magnetospheres of neutron stars are filled with plasma, with the minimum magnetospheric plasma... 2 RESONANT SCATTER IN THE … network auctions ukWebApr 14, 2024 · Abstract Precipitation into the Earth's atmosphere due to pitch angle scattering by plasma waves has been recognized as one ... Whistler mode waves are right-hand polarized electromagnetic waves with frequencies below electron cyclotron frequency ... Resonant harmonic numbers from −10 to 10 and magnetic latitudes within 50° are ... i\u0027m writing to you becauseWebCyclotron line formation by resonant Compton-cyclotron scattering in Hercules X-1. Calculations are presented which show that a spectrum similar to the one observed for Hercules X-1 can be generated. It is shown that there is no straightforward way to explain … network audit checklistWebCyclotron Resonance Scattering Features (hereafter called CRSFs or simply “cyclotron lines”), ﬁrst discovered in the s pec-trumofHer X-1 (Tru¨mper et al., 1977; Tru¨mper et al., 1978), are observed as absorption lines in the spectra of highly magnetized accreting X … i\u0027m writing to you in regards toWebSep 23, 2024 · Electromagnetic ion cyclotron waves are expected to pitch-angle scatter and cause atmospheric precipitation of relativistic (> 1 MeV) electrons under typical conditions in Earth’s radiation belts.However, it has been a long-standing mystery how relativistic … i\\u0027m writing to inquireWebCyclotron resonant scattering features (short: cyclotron lines) are sensitive tracers of the physics of the accretion columns and mounds of X-ray pulsars. They form by interaction of X-ray photons with magnetically quantized electrons in the accreted plasma close to the … i\u0027m writing to you to ask