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Detection of hard X-ray spectrum (spectral index < 2) from the kilo-parsec scale jet of active galactic nuclei cannot be accounted to the synchrotron emission mechanism from the electron distribution responsible for the radio/optical…

高能天体物理现象 · 物理学 2023-08-02 Amal A. Rahman , S. Sahayanathan , Malik Zahoor , P. A Subha

The mechanism responsible for the prompt gamma-ray emission of a gamma-ray burst continues to remain an enigma. The detailed analysis of the spectrum of GRB 131014A observed by the $Fermi$ gamma ray burst monitor and Large Area Telescope…

高能天体物理现象 · 物理学 2025-09-18 Pragyan Pratim Bordoloi , Shabnam Iyyani

Context. We have presented a numerical model for the non-thermal emission of gamma-ray binaries in a pulsar-wind driven scenario. Aims. We apply this model to one of the best-observed gamma-ray binaries, the LS 5039 system. Methods. The…

高能天体物理现象 · 物理学 2021-05-19 David Huber , Ralf Kissmann , Olaf Reimer

A compact Inverse Compton Light Source (ICLS) design is presented, with flux and brilliance orders of magnitude beyond conventional laboratory-scale sources and other compact ICLS designs. This design utilizes the physics of inverse Compton…

加速器物理 · 物理学 2018-08-29 K. E. Deitrick , G. A. Krafft , B. Terzić , J. R. Delayen

It is expected that high energy gamma-rays, if injected relatively close to the massive stars in binary systems LS 5039 and LSI 61 3003, should be strongly absorbed, initiating inverse Compton $e^\pm$ pair cascades in the anisotropic…

天体物理学 · 物理学 2009-11-11 W. Bednarek

The emission mechanism of the gamma-ray bursts (GRBs) is still a matter of debates. The standard synchrotron energy spectrum of cooling electrons F_E ~ E^{-1/2} is much too soft to account for the majority of the observed spectral slopes.…

天体物理学 · 物理学 2009-11-10 Boris E. Stern , Juri Poutanen

The observations of TeV blazars published recently show an unexpected quadratic or even cubic correlation between the X-ray and gamma-ray emission. A standard model of the synchrotron self-Compton emission of a compact source inside a jet…

高能天体物理现象 · 物理学 2015-05-14 K. Katarzynski , K. Walczewska

NASA's Small Explorer Mission GEMS (Gravity and Extreme Magnetism SMEX), scheduled for launch in 2014, will have the sensitivity to detect and measure the linear polarization properties of the 0.5 keV and 2-10 keV X-ray emission of a…

高能天体物理现象 · 物理学 2015-05-30 Henric Krawczynski

We explore the possible association between the microquasar LSI+61 303 and the EGRET source 2CG 135+01/3EG J0241$+$6103 by studying, with a detailed numerical model, whether this system can produce the emission and the variability detected…

天体物理学 · 物理学 2009-11-10 Valenti Bosch-Ramon , Josep M. Paredes

The correlation often observed in blazars between optical-to-radio outbursts and gamma-ray flares suggests that the high-energy emission region shall be co-spatial with the radio knots, several parsecs away from the central engine. This…

高能天体物理现象 · 物理学 2015-05-30 Marc Türler , Claes-Ingvar Björnsson

Observations of TeV emission from early gamma-ray burst (GRB) afterglows revealed the long sought for inverse Compton (IC) upscattering of the lower energy synchrotron. However, it turned out that the long hoped for ability to easily…

高能天体物理现象 · 物理学 2022-03-09 Shotaro Yamasaki , Tsvi Piran

X-ray emission due to inverse-Compton scattering of microwave background photons by electrons in the lobes of powerful radio galaxies has now been seen in a large number of objects. Combining an inverse-Compton model for the lobe X-ray…

天体物理学 · 物理学 2008-01-29 J. L. Goodger , M. J. Hardcastle , J. H. Croston , N. E. Kassim , R. A. Perley

For the interpretation of X-ray radiation from kiloparsec jets of quasars, the inverse Compton scattering of the cosmic microwave background has been widely used for almost 20 years. A recent analysis of the Fermi-LAT observational data…

高能天体物理现象 · 物理学 2020-12-10 M. S. Butuzova , A. B. Pushkarev , E. S. Shablovinskaya , S. V. Nazarov

The recent detection of X-ray flares during the afterglow phase of gamma-ray bursts (GRBs) suggests an inner-engine origin, at radii inside the forward shock. There must be inverse Compton (IC) emission arising from such flare photons…

天体物理学 · 物理学 2008-11-26 Xiang-Yu Wang , Zhuo Li , Peter Meszaros

We have examined the hypothesis that the majority of the diffuse EUV flux in the Coma cluster is due to inverse Compton scattering of low energy cosmic ray electrons (0.16 < epsilon < 0.31 GeV) against the 3K black-body background. We…

天体物理学 · 物理学 2009-10-30 Stuart Bowyer , Thomas W. Berghoefer

We study the contribution of thermal and non-thermal processes to the inverse Compton emission of the radio galaxy M 87 by modelling its broad-band emission. Through this we aim to derive insight into where within the AGN the X-ray,…

高能天体物理现象 · 物理学 2015-04-27 S. de Jong , V. Beckmann , S. Soldi , A. Tramacere , A. Gros

Blazars emit a highly-variable non-thermal spectrum. It is usually assumed that the same non-thermal electrons are responsible for the IR-optical-UV emission (via synchrotron) and the gamma-ray emission (via inverse Compton). Hence, the…

高能天体物理现象 · 物理学 2021-03-10 Emanuele Sobacchi , Joonas Nättilä , Lorenzo Sironi

The study of the quiet Sun in gamma rays started over a decade ago, and rapidly gained a wide interest. Gamma rays from the quiet Sun are produced by Cosmic Rays (CRs) interacting with its surface (disk component) and with its photon field…

高能天体物理现象 · 物理学 2021-04-05 Elena Orlando , Andrew Strong

We re-analyze the Chandra ACIS spectrum of the kpc-scale jet in PKS 0637-752 to investigate the possible low energy cutoff in the relativistic electron spectrum producing the non-thermal radiation in the scenario of inverse Compton emission…

天体物理学 · 物理学 2009-08-07 M. Mueller , D. A. Schwartz

Thanks to Hubble and Chandra telescopes, some of the large scale jets in extragalactic radio sources are now being observed at optical and X-ray frequencies. For the FR I objects the synchrotron nature of this emission is surely…

天体物理学 · 物理学 2009-11-07 L. Stawarz , M. Sikora , M. Ostrowski