人马座A*事件视界附近的磁场结构分辨与变异性
高能天体物理现象
2015-12-04 v1 星系天体物理
天体物理仪器与方法
摘要
在黑洞附近，磁化吸积盘的差动自转被认为会产生一种不稳定性，放大微弱磁场，驱动吸积和外流。这些磁场自然会引发在星系核心观测到的同步辐射发射以及相对论性喷流的形成，但迄今尚无观测能够分辨预期的视界尺度磁场结构。我们报道了在1.3毫米波长处的干涉测量观测，其空间分辨了来自银河系中心超大质量黑洞人马座A*的线偏振发射。我们发现了事件视界附近、尺度约6个史瓦西半径的部分有序磁场的证据，并且我们探测并定位了与这些磁场相关的小时内变异性。
引用
@article{arxiv.1512.01220,
title = {Resolved Magnetic-Field Structure and Variability Near the Event Horizon of Sagittarius A*},
author = {Michael D. Johnson and Vincent L. Fish and Sheperd S. Doeleman and Daniel P. Marrone and Richard L. Plambeck and John F. C. Wardle and Kazunori Akiyama and Keiichi Asada and Christopher Beaudoin and Lindy Blackburn and Ray Blundell and Geoffrey C. Bower and Christiaan Brinkerink and Avery E. Broderick and Roger Cappallo and Andrew A. Chael and Geoffrey B. Crew and Jason Dexter and Matt Dexter and Robert Freund and Per Friberg and Roman Gold and Mark A. Gurwell and Paul T. P. Ho and Mareki Honma and Makoto Inoue and Michael Kosowsky and Thomas P. Krichbaum and James Lamb and Abraham Loeb and Ru-Sen Lu and David MacMahon and Jonathan C. McKinney and James M. Moran and Ramesh Narayan and Rurik A. Primiani and Dimitrios Psaltis and Alan E. E. Rogers and Katherine Rosenfeld and Jason SooHoo and Remo P. J. Tilanus and Michael Titus and Laura Vertatschitsch and Jonathan Weintroub and Melvyn Wright and Ken H. Young and J. Anton Zensus and Lucy M. Ziurys},
journal= {arXiv preprint arXiv:1512.01220},
year = {2015}
}
备注
Accepted for publication in Science; includes Supplementary material