Results 91 to 100 of about 638,354 (389)

External Inverse-compton and Proton Synchrotron Emission from the Reverse Shock as the Origin of VHE Gamma Rays from the Hyper-bright GRB 221009A

The Astrophysical Journal Letters, 2023
The detection of the hyper-bright gamma-ray burst (GRB) 221009A enables us to explore the nature of the GRB emission and the origin of very high-energy gamma rays.
B. Theodore Zhang, Kohta Murase, Kunihito Ioka, Deheng Song, Chengchao Yuan, Péter Mészáros   +5 more
doaj   +1 more source

Supernova remnants and gamma-ray sources [PDF]

, 2002
A review of the possible relationship between gamma-ray sources and supernova remnants (SNRs) is presented. Particular emphasis is given to the analysis of the observational status of the problem of cosmic ray acceleration at SNR shock fronts.
Butt, Yousaf M., Combi, Jorge A., Dame, Thomas M., Romero, Gustavo E., Torres, Diego F.   +4 more
core   +2 more sources

Microquasars as High-energy Gamma-ray Sources [PDF]

Chinese Journal of Astronomy and Astrophysics, 2005
Invited talk presented at the V Microquasar Workshop, Beijing, June 2004. Accepted for publication in the Chinese Journal of Astronomy and Astrophysics.
openaire   +4 more sources

Are Lines From Unassociated Gamma-Ray Sources Evidence For Dark Matter Annihilation? [PDF]

, 2012
Very recently, it was pointed out that there exists a population of gamma-ray sources without associations at other wavelengths which exhibit spectral features consistent with mono-energetic lines at energies of approximately 111 and 129 GeV.
D. Hooper, T. Linden
semanticscholar   +1 more source

Influence of a Standard Heat Treatment on the Microstructure and Properties of Inconel X‐750 Produced by Laser Powder Bed Fusion

Advanced Engineering Materials, EarlyView.
Ni‐base superalloys produced using additive manufacturing (AM) have a different response to heat treatments when compared to their conventional counterparts. Due to such unpredictability, various alloys with industrial interest are currently overlooked in most prior AM research.
Guilherme Maziero Volpato, Adriano de Souza Pinto Pereira, Steffen Neumeier, Dachamir Hotza, Mathias Göken, Ulrich Tetzlaff, Márcio Celso Fredel   +6 more
wiley   +1 more source

Evidence of Minijet Emission in a Large Emission Zone from a Magnetically Dominated Gamma-Ray Burst Jet

The Astrophysical Journal
The second brightest gamma-ray burst (GRB) in history, GRB 230307A, provides an ideal laboratory to study the mechanism of GRB prompt emission thanks to its extraordinarily high photon statistics and its single-episode activity.
S.-X. Yi, C.-W. Wang, X. Shao, R. Moradi, H. Gao, B. Zhang, S.-L. Xiong, S.-N. Zhang, W.-J. Tan, J.-C. Liu, W.-C. Xue, Y.-Q. Zhang, C. Zheng, Y. Wang, P. Zhang, Z.-H. An, C. Cai, P.-Y. Feng, K. Gong, D.-Y. Guo, Y. Huang, B. Li, X.-B. Li, X.-Q. Li, X.-J. Liu, Y.-Q. Liu, X. Ma, W.-X. Peng, R. Qiao, L.-M. Song, J. Wang, P. Wang, Y. Wang, X.-Y. Wen, S. Xiao, Y.-B. Xu, S. Yang, Q.-B. Yi, D.-L. Zhang, F. Zhang, H.-M. Zhang, J.-P. Zhang, Z. Zhang, X.-Y. Zhao, Y. Zhao, S.-J. Zheng   +45 more
doaj   +1 more source

Identifying the Gamma-Ray Emission of the Nearby Galaxy M83

The Astrophysical Journal, 2023
We report on the detection of a γ -ray source at the position of the nearby star-forming galaxy (SFG) M83, which is found from our analysis of 14 yr of the data obtained with the Large Area Telescope on board the Fermi Gamma-ray Space Telescope (Fermi ...
Yi Xing, Zhongxiang Wang
doaj   +1 more source

High-Energy Cosmology: gamma rays and neutrinos from beyond the galaxy

, 2006
Our knowledge of the high-energy universe is undergoing a period of rapid change as new astronomical detectors of high-energy radiation start to operate at their design sensitivities.
A. Mücke, A.M. Bykov, A.M. Hopkins, A.W. Strong, C.D. Dermer, C.D. Dermer, Charles D. Dermer, D. Ryu, D.B. Sanders, D.F. Torres, D.F. Torres, D.J. Thompson, D.N. Spergel, E. Domingo-Santamaría, F. Aharonian, G.E. Romero, J. Albert, J. Binney, J.B.G.M. Bloemen, J.M. Paredes, K. Murase, M. Böttcher, M. Georganopoulos, O. Reimer, P. Sreekumar, P. Sreekumar, P.J.E. Peebles, S. Gabici, S.J. Sturner, T.A. Thompson, T.C. Weekes, U. Keshet, V. Bosch-Ramon, V. Pavlidou, V. Pavlidou   +34 more
core   +1 more source

Very-High-Energy Gamma-Ray Signal from Nuclear Photodisintegration as a Probe of Extragalactic Sources of Ultrahigh-Energy Nuclei [PDF]

, 2010
It is crucial to identify the ultrahigh-energy cosmic-ray (UHECR) sources and probe their unknown properties. Recent results from the Pierre Auger Observatory favor a heavy nuclear composition for the UHECRs.
E. Carmona, I. V. Moskalenko, J. P. Rachen, John F. Beacom, Kohta Murase   +4 more
core   +2 more sources

W‐Based Thin Film Metallic Glasses Doped with Ni, Zr, and B for Industrial Applications

Advanced Engineering Materials, EarlyView.
This work is the first to deal with a comprehensive comparison of two metallic glass systems, W–Zr–B and W–Ni–B, in terms of their suitability for specific industrial applications. Their mechanical and tribological properties are compared and discussed in combination with structural homogeneity on different types of technically relevant substrates and ...
Zbynek Studeny, Antonin Kubicek, Vjaceslav Sochora, Zdenek Pokorny, Stanislava Debnárová, Pavel Soucek   +5 more
wiley   +1 more source