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Demonstration of Ultrawideband Polarimetry Using VLBI Exploration of Radio Astrometry (VERA)
Yoshiaki Hagiwara, Kazuhiro Hada, Mieko Takamura +3
We report on recent technical developments in the front- and back-ends for the four 20 m radio telescopes of the Japanese Very-Long-Baseline Interferometry (VLBI) project, VLBI Exp…
Millimeter/submillimeter VLBI with a Next Generation Large Radio Telescope in the Atacama Desert
Kazunori Akiyama, Jens Kauffmann, Lynn D. Matthews +3
The proposed next generation Event Horizon Telescope (ngEHT) concept envisions the imaging of various astronomical sources on scales of microarcseconds in unprecedented detail with…
Overview of the Observing System and Initial Scientific Accomplishments of the East Asian VLBI Network (EAVN)
Kazunori Akiyama, Juan-Carlos Algaba, Tao An +101
The East Asian VLBI Network (EAVN) is an international VLBI facility in East Asia and is operated under mutual collaboration between East Asian countries, as well as part of Southe…
Multi-frequency VLBI Observations of the M 84 Inner Jet/Counterjet
Xuezheng Wang, Wu Jiang, Zhiqiang Shen +4
Observational studies of inner-most regions of the edge-on jets in nearby active galactic nuclei (AGN) are crucial to understand their kinematics and morphology. For the inner jet…
Sciences with Thai National Radio Telescope
Phrudth Jaroenjittichai, Koichiro Sugiyama, Busaba H. Kramer +44
This White Paper summarises potential key science topics to be achieved with Thai National Radio Telescope (TNRT). The commissioning phase has started in mid 2022. The key science…
Implications from the velocity profile of the M87 jet: a possibility of a slowly rotating black hole magnetosphere
Motoki Kino, Masaaki Takahashi, Tomohisa Kawashima +4
Motivated by the measured velocity profile of the M87 jet using the KVN and VERA Array (KaVA) by Park et al. indicating that the starting position of the jet acceleration is farthe…