事件视界望远镜对半人马座 A 中喷流启动与准直的观测
星系天体物理
2021-11-08 v1 宇宙学与河外天体物理
高能天体物理现象
摘要
活动星系核在毫米波段的甚长基线干涉（VLBI）观测有能力揭示河外射电喷流的启动与初始准直区，在邻近源中可下探至 引力半径（）尺度。半人马座 A 是距地球最近的射电响源。它弥补了梅西耶 87 中超大质量黑洞（SMBH）与我们银河系中心在质量与吸积率上的差距。然而，其 的大南天 declination 迄今阻碍了半人马座 A 在 cm 以下的 VLBI 成像。在此，我们展示用事件视界望远镜在 GHz 获得的该源毫米波 VLBI 图像。与先前观测相比，我们以十倍更高频率与十六倍更锐分辨率对半人马座 A 喷流成像，从而探测亚光日结构。我们揭示了一个高度准直、非对称边缘增亮的喷流以及较暗的反喷流。我们发现半人马座 A 的源结构在 尺度上与梅西耶 87 中的喷流极为相似。此外，我们在 mm 上确定了半人马座 A 的 SMBH 相对于其已分辨喷流核的位置，并得出结论：该源的事件视界阴影应在 THz 频率可见。该位置进一步支持黑洞在宽广质量范围内的普适尺度不变性。
引用
@article{arxiv.2111.03356,
title = {Event Horizon Telescope observations of the jet launching and collimation in Centaurus A},
author = {Michael Janssen and Heino Falcke and Matthias Kadler and Eduardo Ros and Maciek Wielgus and Kazunori Akiyama and Mislav Baloković and Lindy Blackburn and Katherine L. Bouman and Andrew Chael and Chi-kwan Chan and Koushik Chatterjee and Jordy Davelaar and Philip G. Edwards and Christian M. Fromm and José L. Gómez and Ciriaco Goddi and Sara Issaoun and Michael D. Johnson and Junhan Kim and Jun Yi Koay and Thomas P. Krichbaum and Jun Liu and Elisabetta Liuzzo and Sera Markoff and Alex Markowitz and Daniel P. Marrone and Yosuke Mizuno and Cornelia Müller and Chunchong Ni and Dominic W. Pesce and Venkatessh Ramakrishnan and Freek Roelofs and Kazi L. J. Rygl and Ilse van Bemmel and Antxon Alberdi and Walter Alef and Juan Carlos Algaba and Richard Anantua and Keiichi Asada and Rebecca Azulay and Anne-Kathrin Baczko and David Ball and John Barrett and Bradford A. Benson and Dan Bintley and Raymond Blundell and Wilfred Boland and Geoffrey C. Bower and Hope Boyce and Michael Bremer and Christiaan D. Brinkerink and Roger Brissenden and Silke Britzen and Avery E. Broderick and Dominique Broguiere and Thomas Bronzwaer and Do-Young Byun and John E. Carlstrom and Shami Chatterjee and Ming-Tang Chen and Yongjun Chen and Paul M. Chesler and Ilje Cho and Pierre Christian and John E. Conway and James M. Cordes and Thomas M. Crawford and Geoffrey B. Crew and Alejandro Cruz-Osorio and Yuzhu Cui and Mariafelicia De Laurentis and Roger Deane and Jessica Dempsey and Gregory Desvignes and Jason Dexter and Sheperd S. Doeleman and Ralph P. Eatough and Joseph Farah and Vincent L. Fish and Ed Fomalont and H. Alyson Ford and Raquel Fraga-Encinas and Per Friberg and Antonio Fuentes and Peter Galison and Charles F. Gammie and Roberto García and Zachary Gelles and Olivier Gentaz and Boris Georgiev and Roman Gold and Arturo I. Gómez-Ruiz and Minfeng Gu and Mark Gurwell and Kazuhiro Hada and Daryl Haggard and Michael H. Hecht and Ronald Hesper and Elizabeth Himwich and Luis C. Ho and Paul Ho and Mareki Honma and Chih-Wei L. Huang and Lei Huang and David H. Hughes and Shiro Ikeda and Makoto Inoue and David J. James and Buell T. Jannuzi and Michael Janssen and Britton Jeter and Wu Jiang and Alejandra Jimenez-Rosales and Svetlana Jorstad and Taehyun Jung and Mansour Karami and Ramesh Karuppusamy and Tomohisa Kawashima and Garrett K. Keating and Mark Kettenis and Dong-Jin Kim and Jae-Young Kim and Jongsoo Kim and Motoki Kino and Yutaro Kofuji and Shoko Koyama and Michael Kramer and Carsten Kramer and Cheng-Yu Kuo and Tod R. Lauer and Sang-Sung Lee and Aviad Levis and Yan-Rong Li and Zhiyuan Li and Michael Lindqvist and Rocco Lico and Greg Lindahl and Kuo Liu and Wen-Ping Lo and Andrei P. Lobanov and Laurent Loinard and Colin Lonsdale and Ru-Sen Lu and Nicholas R. MacDonald and Jirong Mao and Nicola Marchili and Alan P. Marscher and Iván Martí-Vidal and Satoki Matsushita and Lynn D. Matthews and Lia Medeiros and Karl M. Menten and Izumi Mizuno and James M. Moran and Kotaro Moriyama and Monika Moscibrodzka and Gibwa Musoke and Alejandro Mus Mejías and Hiroshi Nagai and Neil M. Nagar and Masanori Nakamura and Ramesh Narayan and Gopal Narayanan and Iniyan Natarajan and Antonios Nathanail and Joey Neilsen and Roberto Neri and Aristeidis Noutsos and Michael A. Nowak and Hiroki Okino and Héctor Olivares and Gisela N. Ortiz-León and Tomoaki Oyama and Feryal Özel and Daniel C. M. Palumbo and Jongho Park and Nimesh Patel and Ue-Li Pen and Vincent Piétu and Richard Plambeck and Aleksandar PopStefanija and Oliver Porth and Felix M. Pötzl and Ben Prather and Jorge A. Preciado-López and Dimitrios Psaltis and Hung-Yi Pu and Ramprasad Rao and Mark G. Rawlings and Alexander W. Raymond and Luciano Rezzolla and Angelo Ricarte and Bart Ripperda and Alan Rogers and Mel Rose and Arash Roshanineshat and Helge Rottmann and Alan L. Roy and Chet Ruszczyk and Salvador Sánchez and David Sánchez-Arguelles and Mahito Sasada and Tuomas Savolainen and F. Peter Schloerb and Karl-Friedrich Schuster and Lijing Shao and Zhiqiang Shen and Des Small and Bong Won Sohn and Jason SooHoo and He Sun and Fumie Tazaki and Alexandra J. Tetarenko and Paul Tiede and Remo P. J. Tilanus and Michael Titus and Pablo Torne and Tyler Trent and Efthalia Traianou and Sascha Trippe and Huib Jan van Langevelde and Daniel R. van Rossum and Jan Wagner and Derek Ward-Thompson and John Wardle and Jonathan Weintroub and Norbert Wex and Robert Wharton and George N. Wong and Qingwen Wu and Doosoo Yoon and André Young and Ken Young and Ziri Younsi and Feng Yuan and Ye-Fei Yuan and J. Anton Zensus and Guang-Yao Zhao and Shan-Shan Zhao},
journal= {arXiv preprint arXiv:2111.03356},
year = {2021}
}
备注
27 pages, 9 figures. This is a post-peer-review, pre-copyedit version of an article published in Nature Astronomy. The final authenticated version is available online at: https://doi.org/10.1038/s41550-021-01417-w