Results 91 to 100 of about 596,755 (352)

Fermi-LAT study of two gamma-ray binaries, HESS J0632+057 and AGL J2241+4454 [PDF]

, 2013
GeV gamma-ray emission from two gamma-ray binary candidates, HESS J0632+057 and AGL J2241+4454, which were recently reported by H.E.S.S. and AGILE, respectively, have been searched for using the Fermi-LAT archival dataset.
Kawachi, Akiko, Mori, Masaki, Nagataki, Shigehiro, Naito, Tsuguya   +3 more
core  

Wide radio beams from gamma-ray pulsars

, 2010
We investigate the radio and gamma-ray beaming properties of normal and millisecond pulsars by selecting two samples from the known populations. The first, Sample G, contains pulsars which are detectable in blind searches of gamma-ray data from the Fermi
Abdo, Abdo, Abdo, Abdo, Camilo, Camilo, Camilo, Cheng, Cordes, Dyks, Kaspi, Kassim, Lyne, Manchester, Muslimov, Narayan, Pellizzoni, Romani, Shklovskii, Thompson, Watters   +20 more
core   +1 more source

Study of the Effect of Process Parameters and Heat Treatment on the Formation and Evolution of Directed Energy Deposition of IN718‐CuCrZr Interface

Advanced Engineering Materials, EarlyView.
Bimetallic structures of Inconel 718 and CuCrZr are fabricated using the laser powder directed energy deposition method. The study reveals a strong dependence of interface characteristics such as width and interfusion on processing and heat treatment strategies.
Hamidreza Javidrad, Bahattin Koc
wiley   +1 more source

Observation of Galactic Gamma-ray Sources with VERITAS

, 2008
We report on VERITAS observations at energies above 200 GeV of known or potential galactic gamma-ray sources. The observed objects comprise pulsars, pulsar wind nebulae, high-mass X-ray binaries and gamma-ray sources with unknown counterparts in other ...
Felix A. Aharonian, Frank Rieger, G. Maier, null null, Werner Hofmann   +4 more
core   +1 more source

Microstructural Evolution and Mechanical Property Degradation of Sn0.5Ag0.7Cu5Bi Solder Joints with High Indium Alloying

Advanced Engineering Materials, EarlyView.
This study identifies 12 wt% indium (In) as the optimal composition for Sn0.5Ag0.7Cu5Bi solder joints, achieving 87% ductile fracture and 81% suppression of intermetallic compound (IMC) growth versus 4 wt% In. High‐In alloys (15–17 wt%) show abnormal IMC thickening due to thermal activation.
Liuwei Wang, Huidong Gu, Xiaojing Wang, Shanshan Cai, Saad Alshammari, Gaber A. M. Mersal, Yanlai Wang, Xulei Wu, Hanhui Lei, Juanna Ren, Mohamed M. Ibrahim, Terence X. Liu   +11 more
wiley   +1 more source

Theoretical Modeling of the Exceptional GRB 221009A Afterglow

The Astrophysical Journal Letters
The extraordinary gamma-ray burst GRB 221009A provides a great opportunity to investigate the enigmatic origin and evolution of gamma-ray bursts (GRBs). However, the complexity of the observations associated with this GRB provides significant challenges ...
Luca Foffano, Marco Tavani, Giovanni Piano   +2 more
doaj   +1 more source

Effect of Copper Content on the Microstructure and Mechanical Properties of As‐Cast Refractory MoNbTi Multiprincipal Element Alloys

Advanced Engineering Materials, EarlyView.
Copper addition profoundly impacts MoNbTi multiprincipal element alloys. This study reveals copper's dual role, promoting microstructural refinement and strengthening intermetallics at optimal concentrations. An ideal copper content significantly boosts hardness and compressive strength, achieving superior mechanical performance.
Eder Lopes Ortiz, João Felipe Queiroz Rodrigues, Renato Baldan, Erik Poloni, Giovana da Silva Padilha, Wislei Riuper Osório, Ausdinir Danilo Bortolozo   +6 more
wiley   +1 more source

Spectral Line Search in Bright Gamma-Ray Bursts Observed by Fermi/GBM

The Astrophysical Journal
The recently reported discoveries of emission lines with power-law decay from  ∼37 to  ∼6 MeV in the gamma-ray burst (GRB) 221009A have greatly contributed to probing the physics of GRBs, which also raises the natural question of whether there are more ...
Tong-Lei Liao, Yan-Qiu Zhang, Wang-Chen Xue, Shuo Xiao, Shao-Lin Xiong, Xi-Lu Wang, Hua Feng, Chao Zheng, Yue Wang, Jia-Cong Liu, Chen-Wei Wang, Jiao-Jiao Yang, Mei-Xin Hong, Zheng-Huo Jiang, Yang Lai, Xi-Hong Luo   +15 more
doaj   +1 more source

Microstructural Evolution and Mechanical Properties of a Medium‐Manganese Steel Manufactured by Laser‐Based Powder Bed Fusion of Metals

Advanced Engineering Materials, EarlyView.
Fe–12Mn–0.2C medium‐manganese steel is processed by laser‐based powder bed fusion of metals using blended as well as pre‐alloyed powder. Various scanning speeds are used to determine the influence of energy deposition rate on microstructure and mechanical properties.
Leoni Hübner, Bugra Köksal, Thomas Wegener, Christian Haase, Thomas Niendorf   +4 more
wiley   +1 more source

TeV Afterglows of Gamma-Ray Bursts: Theoretical Analysis and Prospects for Future Observations

The Astrophysical Journal
Recent detections of gamma-ray bursts (GRBs) at TeV energies opened new prospects for investigating radiative environments and particle acceleration mechanisms under extreme conditions.
Luca Foffano, Marco Tavani
doaj   +1 more source