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arxiv: 2310.09015 · v1 · pith:H5YBKFU3new · submitted 2023-10-13 · 🌌 astro-ph.HE · astro-ph.GA

Precessing jet nozzle connecting to a spinning black hole in M87

Yuzhu Cui , Kazuhiro Hada , Tomohisa Kawashima , Motoki Kino , Weikang Lin , Yosuke Mizuno , Hyunwook Ro , Mareki Honma
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Kunwoo Yi Jintao Yu Jongho Park Wu Jiang Zhiqiang Shen Evgeniya Kravchenko Juan-Carlos Algaba Xiaopeng Cheng Ilje Cho Gabriele Giovannini Marcello Giroletti Taehyun Jung Ru-Sen Lu Kotaro Niinuma Junghwan Oh Ken Ohsuga Satoko Sawada-Satoh Bong Won Sohn Hiroyuki R. Takahashi Mieko Takamura Fumie Tazaki Sascha Trippe Kiyoaki Wajima Kazunori Akiyama Tao An Keiichi Asada Salvatore Buttaccio Do-Young Byun Lang Cui Yoshiaki Hagiwara Tomoya Hirota Jeffrey Hodgson Noriyuki Kawaguchi Jae-Young Kim Sang-Sung Lee Jee Won Lee Jeong Ae Lee Giuseppe Maccaferri Andrea Melis Alexey Melnikov Carlo Migoni Se-Jin Oh Koichiro Sugiyama Xuezheng Wang Yingkang Zhang Zhong Chen Ju-Yeon Hwang Dong-Kyu Jung Hyo-Ryoung Kim Jeong-Sook Kim Hideyuki Kobayashi Bin Li Guanghui Li Xiaofei Li Zhiyong Liu Qinghui Liu Xiang Liu Chung-Sik Oh Tomoaki Oyama Duk-Gyoo Roh Jinqing Wang Na Wang Shiqiang Wang Bo Xia Hao Yan Jae-Hwan Yeom Yoshinori Yonekura Jianping Yuan Hua Zhang Rongbing Zhao Weiye Zhong
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classification 🌌 astro-ph.HE astro-ph.GA
keywords blackholeradioyearsanglecentralobservationsperiod
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The nearby radio galaxy M87 offers a unique opportunity to explore the connections between the central supermassive black hole and relativistic jets. Previous studies of the inner region of M87 revealed a wide opening angle for the jet originating near the black hole. The Event Horizon Telescope resolved the central radio source and found an asymmetric ring structure consistent with expectations from General Relativity. With a baseline of 17 years of observations, there was a shift in the jet's transverse position, possibly arising from an eight to ten-year quasi-periodicity. However, the origin of this sideways shift remains unclear. Here we report an analysis of radio observations over 22 years that suggests a period of about 11 years in the position angle variation of the jet. We infer that we are seeing a spinning black hole that induces the Lense-Thirring precession of a misaligned accretion disk. Similar jet precession may commonly occur in other active galactic nuclei but has been challenging to detect owing to the small magnitude and long period of the variation.

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