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198 papers · 1 filter
An extremely energetic cosmic ray observed by a surface detector array
Telescope Array Collaboration
Cosmic rays are energetic charged particles from extraterrestrial sources, with the highest energy events thought to come from extragalactic sources. Their arrival is infrequent, s…
The origin of MeV gamma-ray diffuse emission from the inner Galactic region
Naomi Tsuji, Yoshiyuki Inoue, Hiroki Yoneda +2
The origin of the inner Galactic emission, measured by COMPTEL with a flux of MeV cm s sr in the 1-30 MeV range, has remained unsettled since…
Investigating Time Evolution of Thermal Emission from the Putative Neutron Star in SN 1987A for 50+ Years
Akira Dohi, Emanuele Greco, Shigehiro Nagataki +4
Observations collected with the Atacama Large Millimeter/submillimeter Array (ALMA) and analysis of broadband X-ray spectra have recently suggested the presence of a central compac…
Search for the evaporation of primordial black holes with H.E.S.S
H. E. S. S. collaboration, :, F. Aharonian +146
Primordial Black Holes (PBHs) are hypothetical black holes predicted to have been formed from density fluctuations in the early Universe. PBHs with an initial mass around $10^{14}-…
Unveiling properties of the non-thermal X-ray production in the gamma-ray binary LS 5039 using the long-term pattern of its fast X-ray variability
Hiroki Yoneda, Valenti Bosch-Ramon, Teruaki Enoto +5
Gamma-ray binary systems, a subclass of high-mass X-ray binaries, show non-thermal emissions from radio to TeV. While efficient electron acceleration is considered to take place in…
Vela pulsar wind nebula x-rays are polarized to near the synchrotron limit
Fei Xie, Alessandro Di Marco, Fabio La Monaca +90
Pulsar wind nebulae are formed when outflows of relativistic electrons and positrons hit the surrounding supernova remnant or interstellar medium at a shock front. The Vela pulsar…