Zobrazeno 1 - 10
of 111
pro vyhledávání: '"Yuan-Chuan Zou"'
Autor:
Duan-Yuan Gao, Yuan-Chuan Zou
Publikováno v:
The Astrophysical Journal Letters, Vol 961, Iss 1, p L6 (2024)
GRB 221009A produced the highest flux of gigaelectronvolt–teraelectronvolt (GeV–TeV) photons ever observed, allowing the construction of a detailed TeV light curve. We focus on explaining the noticeable dip in the light curve around 2–5 s after
Externí odkaz:
https://doaj.org/article/83d2a894b06a4f66841a1fdbdd5227e6
Autor:
Shao-Yu Fu, Dong Xu, Wei-Hua Lei, Antonio de Ugarte Postigo, D. Alexander Kann, Christina C. Thöne, José Feliciano Agüí Fernández, Yi Shuang-Xi, Wei Xie, Yuan-Chuan Zou, Xing Liu, Shuai-Qing Jiang, Tian-Hua Lu, Jie An, Zi-Pei Zhu, Jie Zheng, Qing-Wen Tang, Peng-Wei Zhao, Li-Ping Xin, Jian-Yan Wei
Publikováno v:
The Astrophysical Journal, Vol 974, Iss 2, p 221 (2024)
We present our optical observations and multiwavelength analysis of the GRB 200613A detected by the Fermi satellite. Time-resolved spectral analysis of the prompt gamma-ray emission was conducted utilizing the Bayesian block method to determine stati
Externí odkaz:
https://doaj.org/article/b0847e816d8b45aa8ecc338de6f9ee5e
Publikováno v:
The Astrophysical Journal, Vol 969, Iss 1, p 45 (2024)
The arrival times of photons with different energy could be different, even when they are emitted from the same source simultaneously. Such a spectral lag is a common property among high-energy astrophysics phenomena like gamma-ray bursts (GRBs). The
Externí odkaz:
https://doaj.org/article/45477efdce1a4868bd966c5ae565a304
Publikováno v:
European Physical Journal C: Particles and Fields, Vol 82, Iss 3, Pp 1-9 (2022)
Abstract We show the analysis of a thin accretion disk around a static and spherically symmetric black hole in dRGT massive gravity. We present the accretion disk analysis in a gravitational theory with a nonzero graviton mass. Also, we study the eve
Externí odkaz:
https://doaj.org/article/723b3f2423914af99d4b3ae08d9a4cee
Autor:
Duan-Yuan Gao, Yuan-Chuan Zou
Publikováno v:
The Astrophysical Journal Letters, Vol 956, Iss 2, p L38 (2023)
The recent detection of teraelectronvolt (TeV) photons from the record-breaking gamma-ray burst GRB 221009A during its prompt phase poses challenges for constraining its Lorentz factor. We reevaluate the constraints on the jet Lorentz factor consider
Externí odkaz:
https://doaj.org/article/58af7c73370b4abd81b010c38c4edbdb
Autor:
Zi-Pei Zhu, Wei-Hua Lei, Daniele B. Malesani, Shao-Yu Fu, Dong-Jie Liu, Dong Xu, Paolo D’Avanzo, José Feliciano Agüí Fernández, Johan P. U. Fynbo, Xing Gao, Ana Nicuesa Guelbenzu, Shuai-Qing Jiang, David Alexander Kann, Sylvio Klose, Jin-Zhong Liu, Xing Liu, Massimiliano De Pasquale, Antonio de Ugarte Postigo, Bringfried Stecklum, Christina Thöne, Joonas Kari Markku Viuho, Yi-Nan Zhu, Jin-Da Li, He Gao, Tian-Hua Lu, Shuo Xiao, Yuan-Chuan Zou, Li-Ping Xin, Jian-Yan Wei
Publikováno v:
The Astrophysical Journal, Vol 959, Iss 2, p 118 (2023)
High-redshift gamma-ray bursts (GRBs) are useful to probe the early Universe, but only a few candidates have been detected so far. Here, we report the optical and near-infrared observations of the afterglow of a relatively high-redshift event GRB 220
Externí odkaz:
https://doaj.org/article/08a0c14aaa694c88b18e7794b82c8139
Publikováno v:
The Astrophysical Journal, Vol 959, Iss 1, p 44 (2023)
The empirical classification of gamma-ray bursts (GRBs) into long and short GRBs based on their durations is already firmly established. This empirical classification is generally linked to the physical classification of GRBs originating from compact
Externí odkaz:
https://doaj.org/article/6b6e93166b7f4329a4a65bbcd94e4300
Autor:
Dong-Jie Liu, Yuan-Chuan Zou
Publikováno v:
The Astrophysical Journal, Vol 955, Iss 1, p 35 (2023)
Tremendous information is hidden in the light curve of a gamma-ray burst (GRB). Based on Compton Gamma Ray Observatory/Burst And Transient Source Experiment (BATSE) data, Hakkila found a majority of GRBs can be characterized by a smooth, single-peake
Externí odkaz:
https://doaj.org/article/7ad90de7622545ceadf5a62780bf6384
Publikováno v:
The Astrophysical Journal, Vol 951, Iss 1, p 3 (2023)
Magnetars are believed to be neutron stars (NSs) with strong magnetic fields. X-ray flares and fast radio bursts (FRBs) have been observed from the magnetar (soft gamma-ray repeater, SGR J1935+2154). We propose that the phase transition of the NS can
Externí odkaz:
https://doaj.org/article/b3fdea1381524f07b7f0c3dddf1f5151
Autor:
Zi-Pei Zhu, Dong Xu, Johan P. U. Fynbo, Shao-Yu Fu, Jun-Bo Zhang, Xing Liu, Shuai-Qing Jiang, Shuo Xiao, Wei Xie, Yuan-Chuan Zou, He Gao, Dieter Hartmann, Antonio de Ugarte Postigo, David Alexander Kann, Massimo Della Valle, Pall Jakobsson, Tayyaba Zafar, Valerio D’Elia, Li-Ping Xin, Jian-Yan Wei, Xing Gao, Jin-Zhong Liu, Tian-Hua Lu, Wei-Hua Lei
Publikováno v:
The Astrophysical Journal, Vol 948, Iss 1, p 30 (2023)
Early optical observations of gamma-ray bursts can significantly contribute to the study of the central engine and physical processes therein. However, of the thousands observed so far, only a few have data at optical wavelengths in the first minutes
Externí odkaz:
https://doaj.org/article/d9098b49e3084d5199335db076df1ca0