Results 1 to 10 of about 26,050 (165)

High-Efficiency Radiation via Fast Electron Beam Pinching in Nonuniform Plasmas [PDF]

open access: yesResearch
The continuous development of bright x/gamma-ray sources has opened up new frontiers of science and advanced applications. Currently, there is still a lack of efficient approaches to produce high-energy gamma-rays with peak brilliance comparable to ...
Xing-Long Zhu   +2 more
doaj   +2 more sources

On the Properties of Inverse Compton Spectra Generated by Upscattering a Power-law Distribution of Target Photons

open access: yesThe Astrophysical Journal, 2023
Relativistic electrons are an essential component in many astrophysical sources, and their radiation may dominate the high-energy bands. Inverse Compton (IC) emission is the radiation mechanism that plays the most important role in these bands. The basic
Dmitry Khangulyan   +2 more
doaj   +1 more source

Limits on Leptonic TeV Emission from the Cygnus Cocoon with Swift-XRT

open access: yesThe Astrophysical Journal, 2023
γ -ray observations of the Cygnus Cocoon, an extended source surrounding the Cygnus X star-forming region, suggest the presence of a cosmic-ray accelerator reaching energies up to a few PeV.
David Guevel   +7 more
doaj   +1 more source

GeV gamma-ray sources [PDF]

open access: yesAIP Conference Proceedings, 2000
<p>Published - <a href="/records/ba0f2-sbp54/files/LAMaipcp00.pdf?download=1">LAMaipcp00.pdf</a></p>
Lamb, R. C., Macomb, D. J.
openaire   +2 more sources

Evidence for Two Distinct Populations of Kilonova-associated Gamma-Ray Bursts

open access: yesThe Astrophysical Journal Letters, 2023
Identification of gamma-ray burst (GRB) progenitors based on the duration of their prompt emission ( T _90 ) has faced several roadblocks recently. Long-duration GRBs (with T _90 > 2 s) have traditionally been thought to be originating from the collapse ...
Dimple, K. Misra, K. G. Arun
doaj   +1 more source

GRB 221009A: The BOAT

open access: yesThe Astrophysical Journal Letters, 2023
GRB 221009A has been referred to as the brightest of all time (BOAT). We investigate the veracity of this statement by comparing it with a half century of prompt gamma-ray burst observations.
Eric Burns   +29 more
doaj   +1 more source

Point Sources of GeV Gamma Rays [PDF]

open access: yesThe Astrophysical Journal, 1997
A catalog of c-ray sources based on photons with energies greater than 1 GeV has been developed from observations taken by the EGRET instrument of the Compton Gamma Ray Observatory. The data are taken from the 4.5 yr of observation available in the public data archives. We emphasize sources that are detected using the entire database, without regard
Lamb, R. C., Macomb, D. J.
openaire   +2 more sources

Massive protostars as gamma-ray sources [PDF]

open access: yesAstronomy and Astrophysics, 2010
Massive protostars have associated bipolar outflows with velocities of hundreds of km s$^{-1}$. Such outflows can produce strong shocks when interact with the ambient medium leading to regions of non-thermal radio emission. We aim at exploring under which conditions relativistic particles are accelerated at the terminal shocks of the protostellar jets ...
Bosch Ramon, V.   +3 more
openaire   +4 more sources

CATACLYSMIC VARIABLES AND GAMMA-RAY SOURCES [PDF]

open access: yesEAS Publications Series, 2013
The cataclysmic variables are associated with high energy events and probably many of them could be potential gamma-ray sources. Up to now Fermi-LAT detected 3 gamma-ray transients, which belong to CVs and related objects: V407 Cyg, N Sco 2012 and N Mon 2012 = V959 Mon. We present the first multicolour observations of the slow classical nova V959 Mon.
E. Pavlenko   +3 more
openaire   +1 more source

Revision of the γ-Ray Emission from SNR CTB 109 with the Fermi Large Area Telescope

open access: yesThe Astrophysical Journal, 2023
CTB 109 is a middle-aged shell-type supernova remnant (SNR) with bright thermal X-ray emission. We reanalyze the GeV γ -ray emission from CTB 109 using 13 yr of Pass 8 data recorded by the Fermi Large Area Telescope.
Yuliang Xin, Qizhen Zhao, Xiaolei Guo
doaj   +1 more source

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