Results 71 to 80 of about 965 (178)

Exploring the Components of Cosmogenic UHECR, Neutrino, and Diffuse Gamma Ray from High-Energy Astrophysical Objects

Galaxies
The development of multimessenger astrophysics allows us to probe various background particles from the distant early universe. Up to now, much effort has been made researching the emission and radiation of diverse steady or transient astrophysical ...
Fangsheng Min, Hong Lu, Yiqing Guo
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Irregularly Sampled Time Series Interpolation for Detailed Binary Evolution Simulations

The Astrophysical Journal
Modeling of large populations of binary stellar systems is an integral part of many areas of astrophysics, from radio pulsars and supernovae to X-ray binaries, gamma-ray bursts, and gravitational-wave mergers.
Philipp M. Srivastava, Ugur Demir, Aggelos Katsaggelos, Vicky Kalogera, Shamal Lalvani, Elizabeth Teng, Tassos Fragos, Jeff J. Andrews, Simone S. Bavera, Max Briel, Seth Gossage, Konstantinos Kovlakas, Matthias U. Kruckow, Camille Liotine, Kyle A. Rocha, Meng Sun, Zepei Xing, Emmanouil Zapartas   +17 more
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Performance of the HAWC Observatory and TeV Gamma-Ray Measurements of the Crab Nebula with Improved Extensive Air Shower Reconstruction Algorithms

The Astrophysical Journal
The High-Altitude Water Cherenkov (HAWC) Gamma-Ray Observatory, located on the side of the Sierra Negra volcano in Mexico, has been fully operational since 2015.
A. Albert, R. Alfaro, C. Alvarez, A. Andrés, J. C. Arteaga-Velázquez, D. Avila Rojas, H. A. Ayala Solares, R. Babu, E. Belmont-Moreno, A. Bernal, K. S. Caballero-Mora, T. Capistrán, A. Carramiñana, F. Carreón, S. Casanova, U. Cotti, J. Cotzomi, S. Coutiño de León, E. De la Fuente, C. de León, D. Depaoli, N. Di Lalla, R. Díaz Hernández, B. L. Dingus, M. A. DuVernois, K. Engel, T. Ergin, C. Espinoza, K. L. Fan, K. Fang, N. Fraija, S. Fraija, J. A. García-González, F. Garfias, H. Goksu, M. M. González, J. A. Goodman, S. Groetsch, J. P. Harding, S. Hernández-Cadena, I. Herzog, J. Hinton, D. Huang, F. Hueyotl-Zahuantitla, P. Hüntemeyer, A. Iriarte, S. Kaufmann, A. Lara, J. Lee, H. León Vargas, J. T. Linnemann, A. L. Longinotti, G. Luis-Raya, K. Malone, J. Martínez-Castro, J. A. Matthews, P. Miranda-Romagnoli, J. A. Montes, E. Moreno, M. Mostafá, L. Nellen, M. U. Nisa, R. Noriega-Papaqui, L. Olivera-Nieto, N. Omodei, M. Osorio-Archila, Y. Pérez Araujo, E. G. Pérez-Pérez, C. D. Rho, D. Rosa-González, E. Ruiz-Velasco, H. Salazar, D. Salazar-Gallegos, A. Sandoval, M. Schneider, G. Schwefer, J. Serna-Franco, A. J. Smith, Y. Son, R. W. Springer, O. Tibolla, K. Tollefson, I. Torres, R. Torres-Escobedo, R. Turner, F. Ureña-Mena, E. Varela, X. Wang, I. J. Watson, K. Whitaker, E. Willox, H. Wu, S. Yu, S. Yun-Cárcamo, H. Zhou, HAWC Collaboration   +95 more
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A Two-hump Spectrum in the Prompt Emission of GRB 240825A

The Astrophysical Journal Letters
An extra hard spectral component that extends to GeV energies, in additional to the typical sub-MeV Band component, appears in several gamma-ray bursts (GRBs) detected by the Fermi Large Area Telescope.
Hai-Ming Zhang, Zi-Qi Wang, Cui-Yuan Dai, Yi-Yun Huang, Wen-Qiang Liang, Ruo-Yu Liu, En-Wei Liang, Xiang-Yu Wang   +7 more
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Can Gamma-Ray Burst Empirical Correlations Be Used for Population Studies?

The Astrophysical Journal
Only a small fraction of gamma-ray bursts (GRBs) have independent redshift measurements, which are essential for understanding their intrinsic properties.
Emre S. Yorgancioglu, Yun-Fei Du, Shu-Xu Yi, Shuang-Nan Zhang   +3 more
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Investigating Polarization Signatures from GRB Models

The Astrophysical Journal
There is still much debate around the inner workings of the gamma-ray-burst (GRB) prompt emission phase, with many questions still left unanswered. Polarization signatures offer a promising new avenue for discriminating between the various GRB prompt ...
Pieter van der Merwe, Markus Böttcher
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Stellar-wind-blown Bubbles as Environments for Late-time Rebrightening of Gamma-ray Burst Afterglows

The Astrophysical Journal Letters
We present multiwavelength afterglow fitting results for three events that exhibit late afterglow rebrightening behavior: EP240414a ( z = 0.401), GRB 240529A ( z = 2.695), and GRB 240218A ( z = 6.782), which span a broad range of redshifts, from the ...
Jia Ren, Xiao-Yan Li, Yun Wang, Lu-Lu Zhang, Da-Ming Wei, Zi-Gao Dai, Zhi-Ping Jin, Da-Bin Lin   +7 more
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Relation between the keV–MeV and TeV Emission of GRB 221009A and Its Implications

The Astrophysical Journal Letters
Gamma-ray bursts (GRBs) are believed to launch relativistic jets, which generate prompt emission by internal processes, and produce long-lasting afterglows by driving external shocks into the surrounding medium.
Yan-Qiu Zhang, Haoxiang Lin, Shao-Lin Xiong, Zhuo Li, Ming-Yu Ge, Chen-Wei Wang, Shu-Xu Yi, Zhen Zhang, Shuang-Nan Zhang, Li-Ming Song, Chao Zheng, Wang-Chen Xue, Jia-Cong Liu, Wen-Jun Tan, Yue Wang, Wen-Long Zhang   +15 more
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Fast-cooling Synchrotron Prompt Emission from Internal Shocks in GRB 241030A

The Astrophysical Journal
We present a time-resolved joint Swift–Fermi spectral study of GRB 241030A ( z = 1.411) that cleanly isolates the synchrotron origin of its prompt emission and favors a matter-dominated internal-shock scenario.
Varun, Bin-Bin Zhang, Xiao-Hong Zhao, Jun Yang, Run-Chao Chen, Vikas Chand   +5 more
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Shear Particle Acceleration in Structured Gamma-Ray Burst Jets. IV. Thermal versus Nonthermal Emission of the Jet Cocoon

The Astrophysical Journal
A distinct thermal or quasi-thermal spectral component is occasionally observed in gamma-ray burst (GRB) prompt emission spectra. Taking GRB 090902B as a case study, we investigate its origin within a structured jet framework, in which the outflow ...
Zi-Qi Wang, Xiao-Li Huang, Hai-Ming Zhang, En-Wei Liang   +3 more
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