FRB Collaboration, Bridget C. Andersen, Kevin Bandura, Mohit Bhardwaj, P. J. Boyle, Charanjot Brar, Daniela Breitman, Tomas Cassanelli, Shami Chatterjee, Pragya… 展开作者
FRB Collaboration, Bridget C. Andersen, Kevin Bandura, Mohit Bhardwaj, P. J. Boyle, Charanjot Brar, Daniela Breitman, Tomas Cassanelli, Shami Chatterjee, Pragya Chawla, Jean-François Cliche, Davor Cubranic, Alice P. Curtin, Meiling Deng, Matt Dobbs, Fengqiu Adam Dong, Emmanuel Fonseca, B. M. Gaensler, Utkarsh Giri, Deborah C. Good, Alex S. Hill, Alexander Josephy, J. F. Kaczmarek, Zarif Kader, Joseph Kania, Victoria M. Kaspi, Calvin Leung, D. Z. Li, Hsiu-Hsien Lin, Kiyoshi W. Masui, Ryan Mckinven, Juan Mena-Parra, Marcus Merryfield, B. W. Meyers, D. Michilli, Arun Naidu, Laura Newburgh, C. Ng, Anna Ordog, Chitrang Patel, Aaron B. Pearlman, Ue-Li Pen, Emily Petroff, Ziggy Pleunis, Masoud Rafiei-Ravandi, Mubdi Rahman, Scott Ransom, Andre Renard, Pranav Sanghavi, Paul Scholz, J. Richard Shaw, Kaitlyn Shin, Seth R. Siegel, Saurabh Singh, Kendrick Smith, Ingrid Stairs, Chia Min Tan, Shriharsh P. Tendulkar, Keith Vanderlinde, D. V. Wiebe, Dallas Wulf, Andrew Zwaniga
Fast radio bursts (FRBs) are millisecond-duration flashes of radio waves that are visible at distances of billions of light-years. The nature of their progenitors and their emission mechanism remain open astrophysical questions. Here we report the detection of the multi-component FRB 20191221A and the identification of a periodic separation of 216.8(1) ms between its components with a significance of 6.5 sigmas. The long (~3 s) duration and nine or more components forming the pulse profile make this source an outlier in the FRB population. Such short periodicity provides strong evidence for a neutron-star origin of the event. Moreover, our detection favours emission arising from the neutron-star magnetosphere, as opposed to emission regions located further away from the star, as predicted by some models.
Revisit the periodicity of SGR J1935+2154 bursts with updated sample
Institute of Astrophysics, Central China Normal University（华中师范大学天体物理研究所）；Key Laboratory of Particle Astrophysics, Institute of High Energy Physics, Chinese Academy of Sciences（中国科学院高能物理研究所粒子天体物理重点实验室）；University of Chinese Academy of Sciences, Chinese Academy of Sciences（中国科学院大学）；Department of Astronomy, Beijing Normal University（北京师范大学天文系）；Department of Physics, Xiangtan University（湘潭大学物理系）；College of physics Sciences Technology, Hebei University（河北大学物理科学与技术学院）；College of Physics and Engineering, Qufu Normal University（曲阜师范大学物理工程学院）；Physics and Space Science College, China West Normal University（西华师范大学物理学与空间科学学院）；College of Physics, Hebei Normal University（河北师范大学物理学院）
A second-scale periodicity in an active repeating fast radio burst source
School of Astronomy and Space Science, Nanjing University（南京大学天文与空间科学学院）；Key Laboratory of Modern Astronomy and Astrophysics (Nanjing University), Ministry of Education（现代天体学与天体物理学教育部重点实验室（南京大学））；Purple Mountain Observatory, Chinese Academy of Sciences（中国科学院紫金山天文台）；School of Physics and Astromoy, Anqing Normal University（安庆师范大学物理与天文学院）；Institute of Astronomy and Astrophysics, Anqing Normal University（安庆师范大学天体物理研究所）；Guizhou Provincial Laboratory of Big Data, College of Big Data and Information Engineering, Guizhou University（贵州大学大数据与信息工程学院贵州省大数据重点实验室）；Xinjiang Astronomical Observatory, Chinese Academy of Sciences（中国科学院新疆天文台）；State Key Laboratory of Radio Astronomy and Technology, Chinese Academy of Sciences（中国科学院射电天文与技术国家重点实验室）；Xinjiang Key Laboratory of Radio Astrophysics（新疆射电天文重点实验室）；College of Astronomy and Space Science, University of Chinese Academy of Sciences（中国科学院大学天文与空间科学学院）
Detection of a Millisecond Periodicity in BATSE Short Gamma-Ray Bursts
School of Astronomy and Space Science, Nanjing University（南京大学天文与空间科学学院）；Key Laboratory of Modern Astronomy and Astrophysics (Nanjing University), Ministry of Education, China（教育部现代天文学与天体物理重点实验室（南京大学））；Institute for Astrophysics, School of Physics, Zhengzhou University（郑州大学物理学院天体物理研究所）；Department of Physics, The University of Hong Kong（香港大学物理系）；The Hong Kong Institute for Astronomy and Astrophysics, The University of Hong Kong（香港大学香港天文学与天体物理研究所）
A new fast radio burst in the datasets containing the Lorimer burst
利用Parkes 64 m口径射电望远镜的多波束接收机，在1.4GHz的麦哲伦云观测资料中，发现了一个新的快速射电暴（FRB~010312）。这些数据集包括洛里默爆发（FRB~010724），它早于日期，我们也重新检测。新的爆发具有更高的色散测量值1187 cm $^{-3}$ pc。该爆发是迄今为止发现的最广泛的爆发之一，是已知的第二早的FRB，也是第九个发现的分散测量值大于1000 cm $^{-3}\,$ pc的FRB。我们的发现表明，在现有的帕克斯数据档案中可能还有更多的爆发事件。
Circularly polarized radio emission from the repeating fast radio burst source FRB 20201124A
产生快速射电暴（FRB）辐射的机制还知之甚少。有针对性地监测重复FRB源提供了机会，以一次性突发不可能的方式充分表征发射特性。在这里，我们报告了FRB 20201124 A源的观测结果，澳大利亚平方公里阵列探路者（ASKAP）和帕克斯64米射电望远镜（Murriyang）的超宽带低（UWL）接收器。该源在2021年4月初进入了一个发射明亮爆发的时期。我们已经探测到了16个来自这个源的爆发。ASKAP探测到的爆发之一是从重复FRB源观测到的最亮爆发，推断通量为$640\pm70$ μ ms。在Parkes UWL探测到的五个爆发中，没有一个显示出1.1- 4 GHz范围内的任何发射。所有的UWL爆发都是高度极化的，它们的法拉第旋转测量（RM）显示出明显的变化。我们得到了一个平均RM的$-614$ rad m $^{-2}$的FRB源的$16$ rad m $^{-2}$在UWL爆发的标准偏差。在其中一个UWL爆发中，我们看到了显著的圆偏振发射的证据，其分数范围为$47\pm1$ %。如此高的圆偏振度在重复FRB源的爆发中从未见过。我们还看到了在这个UWL重复突发脉冲轮廓中的线性偏振位置角的显著变化的证据。重复脉冲群发射的模型需要考虑脉冲群极化特性的多样性。
Low-energy Radio Bursts from Magnetar XTE J1810$-$197: Implications for Fast Radio Bursts
National Centre for Radio Astrophysics, Tata Institute of Fundamental Research（国家射电天文中心，塔塔基础研究所）；Center for Astrophysics & Space Science (CASS), NYU Abu Dhabi（天体物理学与空间科学中心，纽约大学阿布扎比分校）；Department of Physics, New York University（物理系，纽约大学）；Center for Cosmology and Particle Physics (CCPP, Affiliate), New York University（宇宙学与粒子物理中心（附属），纽约大学）
A bright wideband radio burst from the isolated neutron star 2XMM J104608.7$-$594306
The University of Manchester（曼彻斯特大学）；The University of Oxford（牛津大学）；ASTRON, the Netherlands Institute for Radio Astronomy（荷兰射电天文研究所）；Anton Pannekoek Institute, University of Amsterdam（阿姆斯特丹大学安东·潘内科克研究所）；Sydney Institute for Astronomy, School of Physics, The University of Sydney（悉尼大学物理学院天体物理学研究所）；ARC Centre of Excellence for Gravitational Wave Discovery (OzGrav)（引力波发现卓越研究中心）
