Results 71 to 80 of about 425,495 (159)
On the equipartition of thermal and non-thermal energy in clusters of galaxies
, 1999 Clusters of galaxies are revealing themselves as powerful sources of non thermal radiation in a wide range of wavelengths. In order to account for these multifrequency observations equipartition of cosmic rays (CRs) with the thermal gas in clusters of ...
Dermer C. D. +4 more
core +1 more source
The Astrophysical Journal LettersOne of the difficulties in nailing down the physical mechanism of gamma-ray bursts (GRBs) comes from the fact that there has been no clear observational evidence on how far from the central engine the prompt gamma rays of GRBs are emitted.
Z. Lucas Uhm +7 more
doaj +1 more source
Modeling the Time-variable Broadband Emission and Correlation Study of FSRQ S5 1044+71
The Astrophysical JournalWe present a detailed temporal and spectral analysis of the blazar S5 1044+71 using multiwavelength data obtained from the Fermi-LAT and Swift-XRT/UVOT telescopes.
Sajad Ahanger +5 more
doaj +1 more source
The Astrophysical JournalWe present a comprehensive temporal and spectral study of the flat-spectrum radio quasar (FSRQ) PKS 0402−362 using Fermi Large Area Telescope/Swift X-Ray Telescope/UVOT observations spanning from MJD 54686 to 60321.
Zeeshan Nazir +4 more
doaj +1 more source
Solar Energetic Particle Charge States and Abundances with Nonthermal Electrons
The Astrophysical JournalAn important aspect of solar energetic particle (SEP) events is their source populations. Elemental abundance enhancements of impulsive SEP events, originating in presumed coronal reconnection episodes, can be fitted to steep power laws of A / Q , where ...
Jin-Yi Lee +3 more
doaj +1 more source
Investigation of Nulling and Subpulse-drifting Properties of PSR J1649+2533 with FAST
The Astrophysical JournalWe report the nulling and subpulse-drifting properties of PSR J1649+2533 with observations of the Five-hundred-meter Aperture Spherical Radio Telescope (FAST). The FAST observations reveal that the nulling fraction of this pulsar is about 20.9% ± 0.8% at
Lunhua Shang +7 more
doaj +1 more source
The Astrophysical JournalGamma-ray bursts (GRBs) are the most energetic explosions in the Universe, and their afterglow emission provides an opportunity to probe the physics of relativistic shock waves in an extreme environment.
Donggeun Tak +10 more
doaj +1 more source
Radio Polarization from Runaway Star Bowshocks. I. The General Case
The Astrophysical JournalHigh velocity stars move through the interstellar medium with V > 30 km s ^−1 . When the star has powerful winds, under the appropriate conditions, the interaction of the wind with the interstellar material produces a system of shocks.
M. V. del Valle, R. Santos-Lima, M. Pohl
doaj +1 more source
Discovery of a 100 kpc Narrow Curved Twin Jet in the S-shaped Giant Radio Galaxy J0644+1043
The Astrophysical JournalWe report the discovery of an S-shaped morphology of the radio galaxy J0644+1043 imaged with a 30 μ Jy beam ^−1 sensitive 525 MHz broadband (bands 3 + 4) uGMRT map.
Sagar Sethi +3 more
doaj +1 more source
Non-thermal pair production in compact X-ray sources: first-order Compton cascades in soft radiation fields [PDF]
Monthly Notices of the Royal Astronomical Society, 1987 openaire +1 more source