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Publikováno v:
Universe, Vol 10, Iss 9, p 360 (2024)
We present a comprehensive investigation of mid-infrared (MIR) flux variability at 3.4 μm (W1 band) for a large sample of 3816 blazars, using Wide-field Infrared Survey Explorer (WISE) data through December 2022. The sample consists of 1740 flat-spe
Externí odkaz:
https://doaj.org/article/174a975d6a174b44bec68f303b6d7fec
Autor:
Chandra B. Singh, Michael Williams, David Garofalo, Luis Rojas Castillo, Landon Taylor, Eddie Harmon
Publikováno v:
Universe, Vol 10, Iss 8, p 319 (2024)
Mature radio galaxies such as M87 belong to a specific subclass of active galaxies (AGN) whose evolution in time endows them with five distinguishing characteristics, including (1) low excitation emission, (2) low star formation rates, (3) high bulge
Externí odkaz:
https://doaj.org/article/420b18b464694b5a9541a957c28d2a75
Autor:
Tian-Rui Sun, Jin-Jun Geng, Jing-Zhi Yan, You-Dong Hu, Xue-Feng Wu, Alberto J. Castro-Tirado, Chao Yang, Yi-Ding Ping, Chen-Ran Hu, Fan Xu, Hao-Xuan Gao, Ji-An Jiang, Yan-Tian Zhu, Yongquan Xue, Ignacio Pérez-García, Si-Yu Wu, Emilio Fernández-García, María D. Caballero-García, Rubén Sánchez-Ramírez, Sergiy Guziy, I. Olivares, Carlos Jesus Pérez del Pulgar, A. Castellón, S. Castillo, Ding-Rong Xiong, Shashi B. Pandey, David Hiriart, Guillermo García-Segura, William H. Lee, I. M. Carrasco-García, Il H. Park, S. Jeong, Petrus J. Meintjes, Hendrik J. van Heerden, Antonio Martín-Carrillo, Lorraine Hanlon, Bin-Bin Zhang, L. Hernández-García, Maria Gritsevich, Andrea Rossi, Elisabetta Maiorano, Felice Cusano, Paolo D’Avanzo, Matteo Ferro, Andrea Melandri, Massimiliano De Pasquale, Riccardo Brivio, Min Fang, Lu-Lu Fan, Wei-Da Hu, Zhen Wan, Lei Hu, Ying-Xi Zuo, Jin-Long Tang, Xiao-Ling Zhang, Xian-Zhong Zheng, Bin Li, Wen-Tao Luo, Wei Liu, Jian Wang, Hong-Fei Zhang, Hao Liu, Jie Gao, Ming Liang, Hai-Ren Wang, Da-Zhi Yao, Jing-Quan Cheng, Wen Zhao, Zi-Gao Dai
Publikováno v:
The Astrophysical Journal Letters, Vol 976, Iss 2, p L20 (2024)
Thanks to the rapidly increasing time-domain facilities, we are entering a golden era of research on gamma-ray bursts (GRBs). In this Letter, we report our observations of GRB 240529A with the Burst Optical Observer and Transient Exploring System, th
Externí odkaz:
https://doaj.org/article/0c933a0409394e7e90e98575e4ce954e
Autor:
Ore Gottlieb, Brian D. Metzger
Publikováno v:
The Astrophysical Journal Letters, Vol 974, Iss 1, p L9 (2024)
Superluminous supernovae (SLSNe) radiate ≳10–100 times more energy than ordinary stellar explosions, implicating a novel power source behind these enigmatic events. One frequently discussed source, particularly for hydrogen-poor (Type I) SLSNe, i
Externí odkaz:
https://doaj.org/article/a6373b741f3a4325a095ab0c198c0917
Autor:
Asaf Pe’er, Bing Zhang
Publikováno v:
The Astrophysical Journal Letters, Vol 973, Iss 2, p L51 (2024)
The brightest-of-all-time GRB 221009A shows evidence for a narrow evolving MeV emission line. Here, we show that this line is due to pair annihilation in the prompt emission region and that its temporal evolution is naturally explained as a high-lati
Externí odkaz:
https://doaj.org/article/36c45e77979d43c886ef0185c8a37532
Autor:
Jongho Park, Guang-Yao Zhao, Masanori Nakamura, Yosuke Mizuno, Hung-Yi Pu, Keiichi Asada, Kazuya Takahashi, Kenji Toma, Motoki Kino, Ilje Cho, Kazuhiro Hada, Phil G. Edwards, Hyunwook Ro, Minchul Kam, Kunwoo Yi, Yunjeong Lee, Shoko Koyama, Do-Young Byun, Chris Phillips, Cormac Reynolds, Jeffrey A. Hodgson, Sang-Sung Lee
Publikováno v:
The Astrophysical Journal Letters, Vol 973, Iss 2, p L45 (2024)
We report the first observation of the nearby giant radio galaxy NGC 315 using a global very long baseline interferometry (VLBI) array consisting of 22 radio antennas located across five continents, including high-sensitivity stations, at 22 GHz. Uti
Externí odkaz:
https://doaj.org/article/c97eab59016549fd87613fa1f0e38d3a
Autor:
Zhen Zhang, Haoxiang Lin, Zhuo Li, Shao-Lin Xiong, Yan-Qiu Zhang, Qinyuan Zhang, Shu-Xu Yi, Xilu Wang
Publikováno v:
The Astrophysical Journal Letters, Vol 973, Iss 1, p L17 (2024)
Ultrarelativistic jets are believed to play an important role in producing prompt emission and afterglow of gamma-ray bursts (GRBs), but the nature of the jet is poorly known owing to the lack of decisive features observed in the prompt emission. The
Externí odkaz:
https://doaj.org/article/10de7c2e485a4104be03775935b365d7
Publikováno v:
The Astrophysical Journal Letters, Vol 971, Iss 2, p L30 (2024)
The recent gamma-ray burst (GRB) GRB 211211A provides the earliest (∼5 hr) data of a kilonova (KN) event, displaying bright (∼10 ^42 erg s ^−1 ) and blue early emission. Previously, this KN was explained using simplistic multicomponent fitting
Externí odkaz:
https://doaj.org/article/214f82d89b544ac2ae4e5738e3cbf031
Autor:
Callan M. Wood, James C. A. Miller-Jones, Arash Bahramian, Steven J. Tingay, Steve Prabu, Thomas D. Russell, Pikky Atri, Francesco Carotenuto, Diego Altamirano, Sara E. Motta, Lucas Hyland, Cormac Reynolds, Stuart Weston, Rob Fender, Elmar Körding, Dipankar Maitra, Sera Markoff, Simone Migliari, David M. Russell, Craig L. Sarazin, Gregory R. Sivakoff, Roberto Soria, Alexandra J. Tetarenko, Valeriu Tudose
Publikováno v:
The Astrophysical Journal Letters, Vol 971, Iss 1, p L9 (2024)
Multiwavelength polarimetry and radio observations of Swift J1727.8–1613 at the beginning of its recent 2023 outburst suggested the presence of a bright compact jet aligned in the north–south direction, which could not be confirmed without high-a
Externí odkaz:
https://doaj.org/article/be1e89c0b77c453bbaff3060f7108fa2