Polarization properties of 28 repeating fast radio burst sources with CHIME/FRB
C. Ng, A. Pandhi, R. Mckinven, A. P. Curtin, K. Shin, E. Fonseca, B. M. Gaensler, D. L. Jow, V. Kaspi, D. Li, R. Main, K. W. Masui, D. Michilli, K. Nimmo, Z. Pl… 展开作者
C. Ng, A. Pandhi, R. Mckinven, A. P. Curtin, K. Shin, E. Fonseca, B. M. Gaensler, D. L. Jow, V. Kaspi, D. Li, R. Main, K. W. Masui, D. Michilli, K. Nimmo, Z. Pleunis, P. Scholz, I. Stairs, M. Bhardwaj, C. Brar, T. Cassanelli, R. C. Joseph, A. B. Pearlman, M. Rafiei-Ravandi, K. Smith
As part of the Canadian Hydrogen Intensity Mapping Experiment Fast Radio Burst (CHIME/FRB) project, we report 41 new Rotation Measures (RMs) from 20 repeating Fast Radio Bursts (FRBs) obtained between 2019 and 2023 for which no previous RM was determined. We also report 22 additional RM measurements for eight further repeating FRBs. We observe temporal RM variations in practically all repeating FRBs. Repeaters appear to be separated into two categories: those with dynamic and those with stable RM environments, differentiated by the ratios of RM standard deviations over the averaged RM magnitudes. Sources from stable RM environments likely have little RM contributions from the interstellar medium (ISM) of their host galaxies, whereas sources from dynamic RM environments share some similarities with Galactic pulsars in eclipsing binaries but appear distinct from Galactic centre solitary pulsars. We observe a new stochastic, secular, and again stochastic trend in the temporal RM variation of FRB 20180916B, which does not support binary orbit modulation being the reason for this RM changes. We highlight two more repeaters that show RM sign change, namely FRBs 20290929C and 20190303A. We perform an updated comparison of polarization properties between repeating and non-repeating FRBs, which show a marginal dichotomy in their distribution of electron-density-weighted parallel-component line-of-sight magnetic fields.
A series of unfortunate events: CHIME/FRB misclassification of a Galactic pulsar as a periodic fast radio burst
McGill University（麦吉尔大学）；Trottier Space Institute, McGill University（麦克唐纳空间研究所，麦吉尔大学）；University of California, Santa Cruz（加州大学圣克鲁兹分校）；Indian Institute of Technology Kanpur（坎普尔印度理工学院）；Universidad de Chile（智利大学）；Cornell Center for Astrophysics and Planetary Science, Cornell University（康奈尔大学天体物理学与行星科学中心，康奈尔大学）；University of British Columbia（不列颠哥伦比亚大学）；West Virginia University（西弗吉尼亚大学）；Center for Gravitational Waves and Cosmology, West Virginia University（引力波与宇宙学中心，西弗吉尼亚大学）
Nine New Repeating Fast Radio Burst Sources from CHIME/FRB
我们报告的发现和分析的爆发，从九个新的重复快速射电暴（FRB）源发现使用加拿大氢强度测绘实验（CHIME）望远镜。这些源跨越195至1380 pc cm $^{-3}$的色散测量（DM）范围。我们检测到两个爆发从三个新的来源，三个爆发从四个新的来源，四个爆发从一个新的来源，和五个爆发从一个新的来源。我们确定所有来源的天空坐标与$\sim$ 10 $^\prime$的不确定性。我们检测法拉第旋转措施的两个来源，值$-20(1)$和$-499.8(7)$ rad m $^{-2}$，这是大大低于RM从FRB 121102发出的突发。我们发现，DM分布的我们的事件，结合其他九个重复发现的CHIME/FRB，是无法区分的，迄今为止非重复CHIME/FRB事件。然而，如前所述，爆发宽度在统计上明显大于迄今为止非重复的CHIME/FRB事件，进一步支持了固有不同的发射机制和/或局部环境的概念。这些结果与以前的工作是一致的，虽然现在来自18个重复源CHIME/FRB在其第一年的操作中发现。我们确定候选星系，可能包含FRB 190303.J1353+48（DM = 222.4 pc cm $^{-3}$）。
Radio Monitoring Campaign of Active Repeater FRB 20220912A with CHIME
McGill University（麦吉尔大学）；MIT Kavli Institute for Astrophysics and Space Research, Massachusetts Institute of Technology（麻省理工学院卡弗里天体物理与空间研究所）；Massachusetts Institute of Technology（麻省理工学院）；Tel Aviv University（特拉维夫大学）；National Research Council of Canada, Herzberg Astronomy and Astrophysics（加拿大国家研究委员会赫茨伯格天文学与天体物理学研究所）；University of British Columbia（不列颠哥伦比亚大学）
Extreme-Value Distribution Analysis of the Second CHIME/FRB Catalog: Assessing the Rarity of the One-off FRB 20250316A
Purple Mountain Observatory, Chinese Academy of Sciences（中国科学院紫金山天文台）；School of Astronomy and Space Sciences, University of Science and Technology of China（中国科学技术大学天文与空间科学学院）
Constraints on the Physical Association between ICECAT1 Neutrinos and Fast Radio Bursts Using the Second CHIME/FRB Catalogue
The University of Tokyo（东京大学）；National Astronomical Observatory of Japan（日本国立天文台）；Mizusawa VLBI Observatory, National Astronomical Observatory of Japan（水泽甚长基线干涉测量观测站，日本国立天文台）；Department of Physics, National Chung Hsing University（国立中兴大学物理学系）；SOKENDAI（综合研究大学院大学）；Tohoku University（东北大学）；Frontier Research Institute for Interdisciplinary Sciences, Tohoku University（东北大学跨学科前沿研究院）；Astronomical Institute, Graduate School of Science, Tohoku University（东北大学理学研究科天文学研究所）
Discovery of 30 Repeating Fast Radio Burst Sources and Uniform Population Statistics of 80 Repeating Sources from CHIME/FRB
McGill University（麦吉尔大学）；University of Amsterdam（阿姆斯特丹大学）；California Institute of Technology（加州理工学院）；Netherlands Institute for Radio Astronomy（荷兰射电天文研究所）
LOFAR constraints on the repetition & environments of CHIME FRBs
ASTRON, Netherlands Institute for Radio Astronomy（荷兰射电天文研究所）；Anton Pannekoek Institute for Astronomy, University of Amsterdam（阿姆斯特丹大学安东·潘内科克天体物理研究所）；Max Planck Institute for Radio Astronomy, University of Bonn（波恩大学马克斯·普朗克射电天文研究所）；Trottier Space Institute, McGill University（麦吉尔大学特罗蒂尔太空研究所）；Department of Physics, McGill University（麦吉尔大学物理系）；Laboratoire d’Astrophysique de Marseille, Aix-Marseille University, CNRS, CNES（马赛大学CNRS/CNES天体物理学实验室）
A Search for Rotation Measure Flare Candidates in Repeating Fast Radio Bursts
Purple Mountain Observatory, Chinese Academy of Sciences（中国科学院紫金山天文台）；State Key Laboratory of Radio Astronomy and Technology, Purple Mountain Observatory, Chinese Academy of Sciences（中国科学院紫金山天文台射电天文与技术重点实验室）
Searching for Gamma Ray Bursts associated with CHIME Fast Radio bursts
Purple Mountain Observatory, Chinese Academy of Sciences（中国科学院紫金山天文台）；School of Astronomy and Space Sciences, University of Science and Technology of China（中国科学技术大学天文与空间科学学院）；State Key Laboratory of Radio Astronomy and Technology, Purple Mountain Observatory, Chinese Academy of Sciences（中国科学院紫金山天文台射电天文与技术国家重点实验室）；South-Western Institute for Astronomy Research, Yunnan University（云南大学西南天文研究所）
