Acrylonitrile Polymers, Survey and SAN

Ball, Lawrence E.; Curatolo, Benedict S.

doi:10.1002/0471238961.1921182202011212.a01

Cited by 4 publications

(3 citation statements)

References 55 publications

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“…It is possible that the inverse-Compton (IC) scattering of cold-relativistic pulsar wind off the stellar photons produces high-energy gamma-rays (Ball & Kirk 2000;Khangulyan et al 2011. For LS 5039 system, this IC component could play an important role to explain for the observed emissions.…”

Section: Inverse-compton Emission From Cold-relativistic Pulsar Windmentioning

confidence: 99%

High-Energy Emissions From the Gamma-Ray Binary Ls 5039

Takata

Leung

Tam

et al. 2014

ApJ

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We study mechanisms of multi-wavelength emissions (X-ray, GeV and TeV gamma-rays) from the gamma-ray binary LS 5039. This paper is composed of two parts. In the first part, we report on results of observational analysis using four year data of Fermi Large Area Telescope. Due to the improvement of instrumental response function and increase of the statistics, the observational uncertainties of the spectrum in ∼100-300 MeV bands and > 10GeV bands are significantly improved. The present data analysis suggests that the 0.1-100GeV emissions from LS 5039 contain three different components; (i) the first component contributes to <1GeV emissions around superior conjunction, (ii) the second component dominates in 1-10GeV energy bands and (iii) the third component is compatible to lower energy tail of the TeV emissions. In the second part, we develop an emission model to explain the properties of the phase-resolved emissionsin multi-wavelength observations. Assuming that LS 5039 includes a pulsar, we argue that both emissions from magnetospheric outer gap and inverse-Compton scattering process of cold-relativistic pulsar wind contribute to the observed GeV emissions. We assume that the pulsar is wrapped by two kinds of termination shock; Shock-I due to the interaction between the pulsar wind and the stellar wind and Shock-II due to the effect of the orbital motion. We propose that the X-rays are produced by the synchrotron radiation at Shock-I region and the TeV gamma-rays are produced by the inverse-Compton scattering process at Shock-II region.

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Section: Inverse-compton Emission From Cold-relativistic Pulsar Windmentioning

confidence: 99%

High-Energy Emissions From the Gamma-Ray Binary Ls 5039

Takata

Leung

Tam

et al. 2014

ApJ

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“…The models of γ-ray production in the pulsar winds predict the existence of a very hard γ-ray component (spikes) being as a result of the comptonization of the external radiation field by leptons in the relativistic pulsar wind (e.g. [108,77,195]. More recently, Cerutti et al [125] compared the γ-ray emission expected in the case of LSI 61 +303 and LS 5039 to the TeV observations of these two sources.…”

Section: Binaries With Pulsars -Prime Targets For Ctamentioning

confidence: 99%

High energy γ-ray emission from compact galactic sources in the context of observations with the next generation Cherenkov Telescope Arrays

Bednarek

2013

Astroparticle Physics

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The observational progress in the γ-ray astronomy in the last few years has led to the discovery of more than a thousand sources at GeV energies and more than a hundred sources at TeV energies. A few different classes of compact objects in the Galaxy have been established. They show many unexpected features at high energies the physics of which remains mainly unknown. At present it is clear that detailed investigation of these new phenomena can be performed only with the technical equipment which offer an order of magnitude better sensitivity, and a few times better energy, angular and time resolution in the broad energy range staring from a few tens of GeV up to a few hundreds TeV. Such facilities can be realized by the next generation of instruments such as the planned Cherenkov Telescope Array (CTA).The aim of this report is to summarize up to date observational results on the compact galactic sources in the GeV-TeV γ-ray energy range, discuss their theoretical implications, and indicate which hypothesis considered at present might be verified with the next generation of telescopes. We point out which of the observational features of the γ-ray sources are important to investigate with special care with the planned CTA in order to put a new light on physical processes involved. Their knowledge should finally allow us to answer the question on the origin of energetic particles in our Galaxy.

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“…As a result, the photons of the radiation field will be upscattered by the relativistic particles in the associated inverse Compton process. For instance, very high energy emission in pulsars is attributed to the inverse Compton scattering of soft stellar photons by energetic particles in the pulsar wind [8]. This analysis thus naturally leads to observable effects mostly associated with the interaction between plasmas and strong electromagnetic waves.…”

Section: Introductionmentioning

confidence: 99%

Particle dynamics and deviation effects in the field of a strong electromagnetic wave

et al. 2014

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Some strong field effects on test particle motion associated with the propagation of a plane electromagnetic wave in the exact theory of general relativity are investigated. Two different profiles of the associated radiation flux are considered in comparison, corresponding to either constant or oscillating electric and magnetic fields with respect to a natural family of observers. These are the most common situations to be experimentally explored, and have a well known counterpart in the flat spacetime limit. The resulting line elements are determined by a single metric function, which turns out to be expressed in terms of standard trigonometric functions in the case of a constant radiation flux, and in terms of special functions in the case of oscillating flux, leading to different features of test particle motion. The world line deviation between both uncharged and charged particles on different spacetime trajectories due to the combined effect of gravitational and electromagnetic forces is studied. The interaction of charged particles with the background radiation field is also discussed through a general relativistic description of the inverse Compton effect. Motion as well as deviation effects on particles endowed with spin are studied too. Special situations may occur in which the direction of the spin vector change during the interaction, leading to obsevables effects like spin-flip.

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Acrylonitrile Polymers, Survey and SAN

Cited by 4 publications

References 55 publications

High-Energy Emissions From the Gamma-Ray Binary Ls 5039

High-Energy Emissions From the Gamma-Ray Binary Ls 5039

High energy γ-ray emission from compact galactic sources in the context of observations with the next generation Cherenkov Telescope Arrays

Particle dynamics and deviation effects in the field of a strong electromagnetic wave

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