Article
Astronomy & Astrophysics
M. Bailes, C. G. Bassa, G. Bernardi, S. Buchner, M. Burgay, M. Caleb, A. J. Cooper, G. Desvignes, P. J. Groot, I Heywood, F. Jankowski, R. Karuppusamy, M. Kramer, M. Malenta, G. Naldi, M. Pilia, G. Pupillo, K. M. Rajwade, L. Spitler, M. Surnis, B. W. Stappers, A. Addis, S. Bloemen, M. C. Bezuidenhout, G. Bianchi, D. J. Champion, W. Chen, L. N. Driessen, M. Geyer, K. Gourdji, J. W. T. Hessels, V. Kondratiev, M. Klein-Wolt, E. Kording, R. Le Poole, K. Liu, M. E. Lower, A. G. Lyne, A. Magro, V McBride, M. B. Mickaliger, V Morello, A. Parthasarathy, K. Paterson, B. B. P. Perera, D. L. A. Pieterse, Z. Pleunis, A. Possenti, A. Rowlinson, M. Serylak, G. Setti, M. Tavani, R. A. M. J. Wijers, S. ter Veen, V. Venkatraman Krishnan, P. Vreeswijk, P. A. Woudt
Summary: Observations using multiple radio and optical telescopes did not detect significant radio pulses or optical emissions at the location of the magnetar SGR J1935+2154. The distance to the magnetar was constrained to be between 1.5 and 6.5 kiloparsecs based on image analysis and correlations, suggesting the burst on April 28 was less energetic compared to some FRBs. The lack of single-pulse radio detections may indicate rarity or clustering of such events, and suggests the magnetar's ability to produce radio emission efficiently lies between being radio-quiet and radio-loud.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2021)
Article
Multidisciplinary Sciences
Weiwei Zhu, Heng Xu, Dejiang Zhou, Lin Lin, Bojun Wang, Pei Wang, Chunfeng Zhang, Jiarui Niu, Yutong Chen, Chengkui Li, Lingqi Meng, Kejia Lee, Bing Zhang, Yi Feng, Mingyu Ge, Ersin Goegues, Xing Guan, Jinlin Han, Jinchen Jiang, Peng Jiang, Chryssa Kouveliotou, Di Li, Chenchen Miao, Xueli Miao, Yunpeng Men, Chenghui Niu, Weiyang Wang, Zhengli Wang, Jiangwei Xu, Renxin Xu, Mengyao Xue, Yuanpei Yang, Wenfei Yu, Mao Yuan, Youling Yue, Shuangnan Zhang, Yongkun Zhang
Summary: This article reports the emergence of a radio pulsar phase of the magnetar 5 months after FRB 20200428. Pulses were detected in 16.5 hours over 13 days, with luminosities of about eight decades fainter than FRB 20200428. The pulses were emitted in a narrow phase window anti-aligned with the x-ray pulsation profile, while bursts appear in random phases. This suggests that radio pulses originate from a fixed region within the magnetosphere, but bursts occur in random locations and are possibly associated with explosive events in a dynamically evolving magnetosphere.
Article
Astronomy & Astrophysics
Sheng-Lun Xie, Ce Cai, Shao-Lin Xiong, Yun-Wei Yu, Yan-Qiu Zhang, Lin Lin, Zhen Zhang, Wang-Chen Xue, Jia-Cong Liu, Yi Zhao, Shuo Xiao, Chao Zheng, Qi-Bin Yi, Peng Zhang, Ping Wang, Rui Qiao, Wen-Xi Peng, Yue Huang, Xiang Ma, Xiao-Yun Zhao, Xiao-Bo Li, Shi-Jie Zheng, Ming-Yu Ge, Cheng-Kui Li, Xin-Qiao Li, Xiang-Yang Wen, Fan Zhang, Li-Ming Song, Shuang-Nan Zhang, Zhi-Wei Guo, Xiao-Lu Zhang, Guo-Ying Zhao, Chao-Yang Li
Summary: This article explores the periodic behavior of bursts from the Galactic magnetar SGR J1935+2154. By analyzing an updated burst sample, the researchers found a possible period of 126.88 +/- 2.05 days, which could be interpreted as the precession of the magnetar. However, the entire burst history is complex and requires more monitoring observations to test the periodicity hypothesis.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2022)
Article
Astronomy & Astrophysics
A. Borghese, F. Coti Zelati, G. L. Israel, M. Pilia, M. Burgay, M. Trudu, S. Zane, R. Turolla, N. Rea, P. Esposito, S. Mereghetti, A. Tiengo, A. Possenti
Summary: The magnetar SGR J1935+2154 underwent a new active episode with X-ray bursts and enhanced persistent flux. A radio burst similar to fast radio bursts with an X-ray counterpart was observed, indicating that magnetars can generate fast radio bursts. X-ray spectral and timing properties of SGR J1935+2154 during a 7-month monitoring campaign were reported. The spectrum exhibited a non-thermal power-law component and a blackbody component, with the temperature of the latter decreasing over time. The luminosity decay was described by two exponential functions, and the source reached quiescence after about 80 days, releasing a significant amount of energy. The spin-down rate was estimated based on X-ray pulsations.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2022)
Article
Astronomy & Astrophysics
Connery J. Chen, Bing Zhang
Summary: The detection of FRB 200428 coincident with an XRB from the Galactic magnetar SGR J1935+2154 suggests that magnetars can produce FRBs. By analyzing X-ray and radio observations, the geometric and relativistic beaming factors of FRBs are constrained. This study is important for understanding the formation mechanism of FRBs.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2023)
Article
Astronomy & Astrophysics
Xiaobo Li, Mingyu Ge, Lin Lin, Shuang-Nan Zhang, Liming Song, Xuelei Cao, Bing Zhang, Fangjun Lu, Yupeng Xu, Shaolin Xiong, Youli Tuo, Ying Tan, Weichun Jiang, Jinlu Qu, Shu Zhang, Lingjun Wang, Jieshuang Wang, Binbin Zhang, Peng Zhang, Chengkui Li, Congzhan Liu, Tipei Li, Qingcui Bu, Ce Cai, Yong Chen, Yupeng Chen, Zhi Chang, Li Chen, Tianxiang Chen, Yibao Chen, Weiwei Cui, Yuanyuan Du, Guanhua Gao, He Gao, Yudong Gu, Ju Guan, Chengcheng Guo, Dawei Han, Yue Huang, Jia Huo, Shumei Jia, Jing Jin, Lingda Kong, Bing Li, Gang Li, Wei Li, Xian Li, Xufang Li, Zhengwei Li, Xiaohua Liang, Jinyuan Liao, Hexin Liu, Hongwei Liu, Xiaojing Liu, Xuefeng Lu, Qi Luo, Tao Luo, Binyuan Ma, Ruican Ma, Xiang Ma, Bin Meng, Yi Nang, Jianyin Nie, Ge Ou, Xiaoqin Ren, Na Sai, Xinying Song, Liang Sun, Lian Tao, Chen Wang, Pengju Wang, Wenshuai Wang, Yusa Wang, Xiangyang Wen, Bobing Wu, Baiyang Wu, Mei Wu, Shuo Xiao, Sheng Yang, Yanji Yang, Qibin Yi, Qianqing Yin, Yuan You, Wei Yu, Fan Zhang, Hongmei Zhang, Juan Zhang, Wanchang Zhang, Wei Zhang, Yifei Zhang, Yuanhang Zhang, Haisheng Zhao, Xiaofan Zhao, Shijie Zheng, Dengke Zhou
Summary: This study reports the detection of a strong quasi-periodic oscillation (QPO) of about 40 Hz in an X-ray burst from the magnetar SGR J1935+2154, which is associated with FRB 200428. The discovery suggests that some FRBs may be related to strong oscillation processes of neutron stars, providing important clues for understanding the origin and mechanism of FRBs.
ASTROPHYSICAL JOURNAL
(2022)
Article
Astronomy & Astrophysics
Shuo Xiao, Jiao-Jiao Yang, Xi-Hong Luo, Shao-Lin Xiong, Yuan-Hong Qu, Shuang-Nan Zhang, Wang-Chen Xue, Xiao-Bo Li, You-Li Tuo, Ai-Jun Dong, Ru-Shuang Zhao, Shi-Jun Dang, Lun-Hua Shang, Qing-Bo Ma, Ce Cai, Jin Wang, Ping Wang, Cheng-Kui Li, Shu-Xu Yi, Zhen Zhang, Ming-Yu Ge, Shi-Jie Zheng, Li-Ming Song, Wen-Xi Peng, Xiang-Yang Wen, Xin-Qiao Li, Zheng-Hua An, Xin Xu, Yue Wang, Chao Zheng, Yan-Qiu Zhang, Jia-Cong Liu, Bin Zhang, Wei Xie, Jian-Chao Feng, De-Hua Wang, Qi-Jun Zhi
Summary: In this work, the minimum variation timescale (MVT) of X-ray bursts from SGR J1935+2154 is systematically studied. The MVTs peak at about 2 ms, supporting the magnetospheric origin in pulsar-like models. The shock radius and Lorentz factor of the jet in GRB-like models are also constrained. The MVT of the XRB associated with FRB 200428 is longer than most bursts, indicating a special radiation mechanism.
ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES
(2023)
Article
Astronomy & Astrophysics
Wen-Long Zhang, Xiu-Juan Li, Yu-Peng Yang, Shuang-Xi Yi, Cheng-Kui Li, Qing-Wen Tang, Ying Qin, Fa-Yin Wang
Summary: This study published 75 X-ray bursts produced by magnetar SGR J1935+2154 during an active period in 2020, including the analysis of the duration, net photon counts, and waiting time for each burst. The cumulative distributions of these parameters were well-fitted by a power-law model, suggesting a self-organizing criticality phenomenon. The study also found no significant evolution of this phenomenon in different energy bands.
RESEARCH IN ASTRONOMY AND ASTROPHYSICS
(2023)
Article
Astronomy & Astrophysics
Jun-Yi Shen, Yuan-Chuan Zou, Shu-Hua Yang, Xiao-Ping Zheng, Kai Wang
Summary: Magnetars, which are neutron stars with strong magnetic fields, have been observed to emit X-ray flares and fast radio bursts (FRBs). This study proposes that the phase transition of neutron stars can generate the energy required for FRBs and SGRs. By solving the Tolman-Oppenheimer-Volkoff equations using the MIT bag model and mean field approximation, the authors find that the phase transition from hadronic to quark matter releases significant gravitational potential energy. The energy released, time interval between phase transitions, and observed glitches align with the behavior of FRBs and X-ray flares from SGR J1935+2154. Therefore, the phase transition of neutron stars is a plausible mechanism to power SGRs and repeating FRBs.
ASTROPHYSICAL JOURNAL
(2023)
Article
Astronomy & Astrophysics
Ce Cai, Wang-Chen Xue, Cheng-Kui Li, Shao-Lin Xiong, Shuang-Nan Zhang, Lin Lin, Xiao-Bo Li, Ming-Yu Ge, Hai-Sheng Zhao, Li-Ming Song, Fang-Jun Lu, Shu Zhang, Yan-Qiu Zhang, Shuo Xiao, You-Li Tuo, Qi-Bin Yi, Zhi Wei Guo, Sheng Lun Xie, Yi Zhao, Zhen Zhang, Qing-Xin Li, Jia-Cong Liu, Chao Zheng, Ping Wang
Summary: This study analyzes the long-term observations of SGR J1935+2154 and discovers a series of burst characteristics. No correlation between X-ray bursts and radio bursts, except for FRB 200428, is found.
ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES
(2022)
Article
Astronomy & Astrophysics
Yu-Han Yang, Bin-Bin Zhang, Lin Lin, Bing Zhang, Guo-Qiang Zhang, Yi-Si Yang, Zuo-Lin Tu, Jin-Hang Zou, Hao-Yang Ye, Fa-Yin Wang, Zi-Gao Dai
Summary: The study on fast radio bursts originating from Galactic magnetars revealed unique characteristics of FRB-associated X-ray bursts in comparison to other X-ray bursts, supporting the magnetar origin of cosmological FRBs. Indirect support was also found for the magnetar origin hypothesis of cosmological FRBs through the comparison with the first repeating FRB source. The research suggested that only a small fraction of X-ray bursts are associated with FRBs, indicating a complex relationship between the two phenomena.
ASTROPHYSICAL JOURNAL LETTERS
(2021)
Article
Astronomy & Astrophysics
Ce Cai, Shao-Lin Xiong, Lin Lin, Cheng-Kui Li, Shuang-Nan Zhang, Wang-Chen Xue, You-Li Tuo, Xiao-Bo Li, Ming-Yu Ge, Hai-Sheng Zhao, Li-Ming Song, Fang-Jun Lu, Shu Zhang, Qing-Xin Li, Shuo Xiao, Zhi-Wei Guo, Sheng-Lun Xie, Yan-Qiu Zhang, Qi-Bin Yi, Yi Zhao, Zhen Zhang, Jia-Cong Liu, Chao Zheng, Ping Wang
Summary: Insight-HXMT has observed the magnetar SGR J1935+2154 and found that about 15% of the bursts can be described by the CPL model, with a higher frequency of occurrence. The radiation intensity of these bursts is weaker compared to Fermi/GBM, but follows the same power-law distribution. Additionally, a burst with a similar peak energy to the X-ray burst associated with FRB 200428 has been discovered.
ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES
(2022)
Article
Astronomy & Astrophysics
Yuki Kaneko, Ersin Gogus, Matthew G. Baring, Chryssa Kouveliotou, Lin Lin, Oliver J. Roberts, Alexander J. van der Horst, George Younes, Ozge Keskin, Omer Faruk Coban
Summary: During April and May 2020, SGR J1935+2154 emitted numerous short bursts, with one burst forest episode exhibiting thermal spectral components and high-energy maxima during photon flux peaks correlated with the spin period of the source. The emitting area of the high-energy component was significantly smaller than the low-energy component, indicating a potential origin within closed toroidal magnetic field lines at a low-altitude hotspot.
ASTROPHYSICAL JOURNAL LETTERS
(2021)
Article
Astronomy & Astrophysics
Xue-Feng Lu, Li-Ming Song, Ming-Yu Ge, You-Li Tuo, Shuang-Nan Zhang, Jin-Lu Qu, Ce Cai, Sheng-Lun Xie, Cong-Zhan Liu, Cheng-Kui Li, Yu-Cong Fu, Ying-Chen Xu, Tian-Ming Li
Summary: On April 27, 2020, the soft gamma-ray repeater SGR J1935+2154 experienced another intense outburst. Insight-HXMT conducted a one-month observation of the source, detecting a total of 75 bursts and accumulating persistent emission data. The spin period search result and the phase distribution of burst start times and burst photon arrival times were analyzed for both Insight-HXMT and Fermi/Gamma-ray Burst Monitor (GBM). It was found that the distribution of burst start times is uniform within its spin phase, while the phase distribution of burst photons is dependent on the burst's energy spectrum.
RESEARCH IN ASTRONOMY AND ASTROPHYSICS
(2023)
Article
Astronomy & Astrophysics
Shuo Xiao, You-Li Tuo, Shuang-Nan Zhang, Shao-Lin Xiong, Lin Lin, Yan-Qiu Zhang, Yue Wang, Wang-Chen Xue, Ce Cai, He Gao, Cheng-Kui Li, Xiao-Bo Li, Chao Zheng, Jia-Cong Liu, Ping Wang, Jin Wang, Wen-Xi Peng, Cong-Zhan Liu, Xin-Qiao Li, Xiang-Yang Wen, Zheng-Hua An, Li-Ming Song, Shi-Jie Zheng, Fan Zhang, Ai-Jun Dong, Wei Xie, Jian-Chao Feng, Qing-Bo Ma, De-Hua Wang, Xi-Hong Luo, Shi-Jun Dang, Lun-Hua Shang, Qi-Jun Zhi, Ti-Pei Li
Summary: The spectral lag of low-energy photons compared to high-energy photons is a common astrophysical phenomenon that can provide insights into the underlying radiation mechanism. In this study, the spectral lag of magnetar bursts from SGR J1935+2154 observed between July 2014 and January 2022 was systematically analyzed using the Li-CCF method. It was found that approximately 61% of the bursts showed a linear relationship between the spectral lag and photon energy, which can be attributed to a linear change in the temperature of the emitting plasma. The distribution of the slope followed a Gaussian function, with a mean value of 0.02 ms keV(-1) (indicating earlier arrival of high-energy photons) and a standard deviation of 0.02 ms keV(-1). Additionally, the distribution was well-fitted with three Gaussian functions, suggesting different origins of the bursts. These spectral lag features have important implications for understanding magnetar bursts.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2023)
Article
Engineering, Mechanical
Baojun Zhu, Erwei Li, Tieshi Zhao, Chang Wang, Zhaofeng Tang, ZiNing Li
Summary: This paper proposes a cable-driven series-parallel hybrid double-mass active anti-swing mechanism for heavy cargo swing suppression on offshore boom cranes, and validates its dynamic performance through numerical solutions and experiments. The results demonstrate the existence of various non-smooth behaviors in the system, which is significant for further research on anti-swing controllers.
MECHANISM AND MACHINE THEORY
(2023)
Article
Astronomy & Astrophysics
X. D. Jia, J. P. Hu, F. Y. Wang
Summary: This study presents a novel non-parametric method to estimate the Hubble constant as a function of redshift by diagonalizing the covariance matrix. A decreasing trend in the Hubble constant is found with a significance of a 5.6 sigma confidence level using data from type Ia supernovae, baryon acoustic oscillation, and observed Hubble parameter. The Hubble constant is consistent with the local distance ladder at low redshift and drops to the value measured from the cosmic microwave background at high redshift. Our results may relieve the Hubble tension, favoring recent solutions and novel physics.
ASTRONOMY & ASTROPHYSICS
(2023)
Article
Astronomy & Astrophysics
Jun Yang, Xiao-Hong Zhao, Zhenyu Yan, Xiangyu Ivy Wang, Yan-Qiu Zhang, Zheng-Hua An, Ce Cai, Xin-Qiao Li, Zihan Li, Jia-Cong Liu, Zi-Ke Liu, Xiang Ma, Yan-Zhi Meng, Wen-Xi Peng, Rui Qiao, Lang Shao, Li-Ming Song, Wen-Jun Tan, Ping Wang, Chen-Wei Wang, Xiang-Yang Wen, Shuo Xiao, Wang-Chen Xue, Yu-Han Yang, Yi-Han Iris Yin, Bing Zhang, Fan Zhang, Shuai Zhang, Shuang-Nan Zhang, Chao Zheng, Shi-Jie Zheng, Shao-Lin Xiong, Bin-Bin Zhang
Summary: This study presents systematic modeling of the time-resolved spectra of GRB, successfully fitting three different spectral models to the observational data. The results indicate that the burst's spectra are fully in accordance with the synchrotron radiation mechanism from relativistic electrons accelerated at a large emission radius. The lack of thermal emission in the prompt emission spectra supports a Poynting flux-dominated jet composition.
ASTROPHYSICAL JOURNAL LETTERS
(2023)
Article
Engineering, Environmental
Bing Zhao, Chao Shen, Hao Yan, Jingwei Xie, Xiaoyu Liu, Yang Dai, Jiujun Zhang, Jin-cheng Zheng, Lijun Wu, Yimei Zhu, Yong Jiang
Summary: In this study, uniform oxygen defects were injected into the surface region of Li1.2Ni0.13Co0.13Mn0.54O2 to improve its electrochemical performance, resulting in high initial coulombic efficiency, outstanding capacity retention, and low voltage decay.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Surgery
Tamas Sztipits, Peter Meszaros, Zsolt Duboczki, Daniel Wettstein, Gergely Olah, Kornel Mezo, Barna Budai, Tamas Mersich
Summary: Comparing to conventional procedures, studies have shown that complete mesocolic excision (CME) for right-sided colon cancer has long-term oncologic advantages without increasing perioperative morbidity or mortality.
EUROPEAN SURGERY-ACTA CHIRURGICA AUSTRIACA
(2023)
Article
Biochemistry & Molecular Biology
Yuan Zhu, Tian-Xiao Yang, Hang Li, Ben-Kun Qi, Qing-Sheng Zhao, Bing Zhao
Summary: This study compared the pretreatment effects of seven deep eutectic solvents (DESs) on grapevine agricultural by-products, with a focus on the removal of lignin and hemicellulose and the analysis of the pretreated residues. The results showed that both acidic choline chloride-lactic (CHCl-LA) and alkaline potassium carbonate-ethylene glycol (K2CO3-EG) were effective in delignification, but the lignin extracted by CHCl-LA had inferior physicochemical properties compared to K2CO3-EG lignin. It was found that the high antioxidant activity of K2CO3-EG lignin was mainly due to the abundant phenol hydroxyl, guaiacyl (G), and para-hydroxy-phenyl (H) groups.
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
(2023)
Article
Astronomy & Astrophysics
Jiwei Li, Liangliang Su, Lei Wu, Bin Zhu
Summary: In this work, ionization signals are considered as an important approach for detecting light dark matter, specifically focusing on sub-GeV inelastic dark matter. The study utilizes non-relativistic effective field theory to derive constraints on the spin-dependent DM-electron scattering and DM-nucleus Migdal scattering. The results suggest that the exclusion limits of DM-proton/neutron and DM-electron scattering cross sections are much stronger for exothermic inelastic dark matter than for endothermic inelastic dark matter.
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
(2023)
Article
Engineering, Chemical
Shoubu Hou, Qing-Sheng Zhao, Senlin Chang, Hang Li, Sheng-hua Zha, Qiushuang Li, Di Weng, Qiao Qin, Bing Zhao, Jinyu Zhang
Summary: This study discussed the physical and chemical attributes and antioxidant capacity of six kinds of Cistanche deserticola powders prepared by jet milling. With the decrease of particle size, the specific surface areas, water and oil holding capacities increased significantly. Superfine grinding promoted the dissolution of active substances and showed great potential in the food industry.
JOURNAL OF FOOD PROCESS ENGINEERING
(2023)
Article
Multidisciplinary Sciences
Brendan O'Connor, Eleonora Troja, Geoffrey Ryan, Paz Beniamini, Hendrik van Eerten, Jonathan Granot, Simone Dichiara, Roberto Ricci, Vladimir Lipunov, James H. Gillanders, Ramandeep Gill, Michael Moss, Shreya Anand, Igor Andreoni, Rosa L. Becerra, David A. H. Buckley, Nathaniel R. Butler, Stephen B. Cenko, Aristarkh Chasovnikov, Joseph Durbak, Carlos Francile, Erica Hammerstein, Alexander J. van der Horst, Mansi M. Ksilwal, Chryssa Kouveliotou, Alexander S. Kutyrev, William H. Lee, Gokul P. Srinivasaragavan, Vladislav Topolev, Alan M. Watson, Yuhan Yang, Kirill Zhirkov
Summary: GRB 221009A, the brightest long-duration gamma-ray burst ever observed, displays X-ray brightness that decays as a power law, indicating a shallow energy profile of the relativistic jet. This behavior challenges standard predictions and suggests a common central engine powering the most extreme explosions, as observed in other energetic GRBs.
Article
Astronomy & Astrophysics
Yong-Kun Zhang, Di Li, Bing Zhang, Shuo Cao, Yi Feng, Wei-Yang Wang, Yuanhong Qu, Jia-Rui Niu, Wei-Wei Zhu, Jin-Lin Han, Peng Jiang, Ke-Jia Lee, Dong-Zi Li, Rui Luo, Chen-Hui Niu, Chao-Wei Tsai, Pei Wang, Fa-Yin Wang, Zi-Wei Wu, Heng Xu, Yuan-Pei Yang, Jun-Shuo Zhang, De-Jiang Zhou, Yu-Hao Zhu
Summary: We report the observations of FRB 20220912A using the Five-hundred-meter Aperture Spherical radio Telescope. The observations reveal that the FRB has a steep energy distribution and complex circular polarization characteristics. The findings imply that the circular polarization mechanism of FRBs likely originates from an intrinsic radiation mechanism.
ASTROPHYSICAL JOURNAL
(2023)
Article
Astronomy & Astrophysics
Jia-Lun Li, Yu-Peng Yang, Shuang-Xi Yi, Jian-Ping Hu, Fa-Yin Wang, Yan-Kun Qu
Summary: Gamma-ray bursts (GRBs) are energetic events that can be used to explore the high-redshift universe. We find correlations between plateau luminosity, end time of plateau, and isotropic energy release in GRB samples. These correlations can be used to constrain cosmological parameters and serve as standard candles. Using different combinations of optical and X-ray samples, we obtain different constraints for flat and non-flat Lambda CDM models.
ASTROPHYSICAL JOURNAL
(2023)
Article
Astronomy & Astrophysics
Zhao-Yang Xia, Yuan-Pei Yang, Qiao-Chu Li, Fa-Yin Wang, Bo-Yang Liu, Zi-Gao Dai
Summary: In this paper, the authors investigate the polarization evolution of fast radio bursts (FRBs) by analyzing the Faraday conversion (FC) effect in a binary system involving an FRB source. They find that the radial magnetic field of a strongly magnetized high-mass companion star can induce circular polarization (CP) in an FRB, with the degree of CP oscillating symmetrically around the zero point. The authors also observe significant polarization variations near the superior conjunction of the binary orbit and explore the effect of the rotation of the companion star.
ASTROPHYSICAL JOURNAL
(2023)
Article
Astronomy & Astrophysics
Rui-Nan Li, Zhen-Yin Zhao, Zhifu Gao, Fa-Yin Wang
Summary: Recent observations have found complex variations in repeating fast radio bursts (FRBs), which are related to binary systems containing supermassive black holes and neutron stars. These systems produce low-frequency gravitational-wave signals that can be used to detect FRBs and serve as independent cosmological probes.
ASTROPHYSICAL JOURNAL LETTERS
(2023)
Article
Astronomy & Astrophysics
Xiao Tian, Jia-Lun Li, Shuang-Xi Yi, Yu-Peng Yang, Jian-Ping Hu, Yan-Kun Qu, Fa-Yin Wang
Summary: This paper investigates the plateau phase in radio afterglows of gamma-ray bursts (GRBs) and explores the correlations between various parameters of the radio plateaus. The study finds that radio plateaus may have a different physical mechanism compared to X-ray and optical plateaus. The research also demonstrates the potential of using GRBs as standard candles to constrain cosmological parameters when combined with other probes.
ASTROPHYSICAL JOURNAL
(2023)
