- evn2024@mpifr.de
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Contribution
Speakers
- Dr. Hyunwook RO
Primary authors
- Dr. Hyunwook RO (Korea Astronomy and Space Science Institute)
Co-authors
- Mr. Kunwoo YI (Seoul National University)
- Dr. Motoki KINO (Kogakuin University)
- Prof. Kazuhiro HADA (Nagoya City University)
- Dr. Yuzhu CUI (Zhejiang Lab)
- Prof. Yosuke MIZUNO (Shanghai Jiao Tong University)
- Dr. Tomohisa KAWASHIMA (Institute for Cosmic Ray Research)
- Prof. Jongho PARK (Kyung Hee University)
- Prof. Bong Won SOHN (Korea Astronomy and Space Science Institute)
- Dr. Wajima KIYOAKI (Korea Astronomy and Space Science Institute)
- Dr. Marcello GIROLETTI (INAF Istituto di Radioastronomia)
- Prof. Gabriele GIOVANNINI (Bologna University and IRA/INAF)
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Content
We introduce high-cadence monitoring of the M87 jet using EATING VLBI, a joint facility between the East Asia VLBI Network (EAVN) and three Italian telescopes. Currently, EATING VLBI is the only array focusing on regular monitoring of the sub-mas-scale structure of the M87 jet. Here, we present the first images from this program, successfully detecting jet emissions up to $\sim$10 mas from the core with typical angular resolutions of $\sim$0.3 mas (naturally weighted) or $\sim$0.2 mas (uniformly weighted). In particular, images of joint observations with the Tidbinbilla-70m telescope effectively resolve the transverse jet structure by extending the N–S baseline. Using this intensive (3-week interval), high-resolution monitoring, we aim to investigate the connection between long-term position angle changes at horizon-scale and mas-scale, as well as the origin of the recently discovered small-scale fast transverse oscillations. Preliminary results of the ridgeline analysis are presented, along with plans for regular joint observations of EATING VLBI and Long Baseline Array (LBA).