HINOTORI and Its Perspectives in the Black-Hole Jet Study
Toshihisa Tsutsumi,
Kotaro Niinuma,
Hiroshi Imai,
Ryoko Amari,
Yusuke Shimizu,
Hideo Ogawa,
Atsushi Nishimura,
Chieko Miyazawa,
Tomoaki Oyama,
Hiroyuki Kaneko,
Keisuke Nakashima,
Satoko Sawada-Satoh,
Takahiro Aoki
Affiliations
Toshihisa Tsutsumi
Graduate School of Sciences and Technology for Innovation, Yamaguchi University, 1677-1 Yoshida, Yamaguchi 753-8512, Yamaguchi, Japan
Kotaro Niinuma
Graduate School of Sciences and Technology for Innovation, Yamaguchi University, 1677-1 Yoshida, Yamaguchi 753-8512, Yamaguchi, Japan
Hiroshi Imai
Amanogawa Galaxy Astronomy Research Center, Graduate School of Science and Engineering, Kagoshima University, 1-21-24 Korimoto, Kagoshima 890-8580, Kagoshima, Japan
Ryoko Amari
Graduate School of Sciences and Technology for Innovation, Yamaguchi University, 1677-1 Yoshida, Yamaguchi 753-8512, Yamaguchi, Japan
Yusuke Shimizu
Graduate School of Sciences and Technology for Innovation, Yamaguchi University, 1677-1 Yoshida, Yamaguchi 753-8512, Yamaguchi, Japan
Hideo Ogawa
Graduate School of Science, Osaka Metropolitan University, 1-1 Gakuen-cho, Nakaku, Sakai 599-8531, Osaka, Japan
Atsushi Nishimura
Nobeyama Radio Observatory, National Astronomical Observatory of Japan, 462-2 Nobeyama, Minamimaki, Minamisaku 384-1305, Nagano, Japan
Chieko Miyazawa
Nobeyama Radio Observatory, National Astronomical Observatory of Japan, 462-2 Nobeyama, Minamimaki, Minamisaku 384-1305, Nagano, Japan
Tomoaki Oyama
Mizusawa VLBI Observatory, National Astronomical Observatory of Japan, 2-12 Hoshigaoka-cho, Mizusawa-ku, Oshu 023-0861, Iwate, Japan
Hiroyuki Kaneko
Graduate School of Education, Joetsu University of Education, 1 Yamayashiki-machi, Joetsu 943-8512, Niigata, Japan
Keisuke Nakashima
Department of Physics and Astronomy, Faculty of Science, Kagoshima University, 1-21-24 Korimoto, Kagoshima 890-8580, Kagoshima, Japan
Satoko Sawada-Satoh
Graduate School of Science, Osaka Metropolitan University, 1-1 Gakuen-cho, Nakaku, Sakai 599-8531, Osaka, Japan
Takahiro Aoki
The Research Institute for Time Studies, Yamaguchi University, 1677-1 Yoshida, Yamaguchi 753-8511, Yamaguchi, Japan
Simultaneous multi-band very long baseline interferometry (VLBI) observations at millimeter wavelengths have huge potential for various science cases. However, there exist difficulties in expanding the scientific targets, as the sensitivity of radio telescopes at millimeter wavelengths is typically lower compared to that at centimeter wavelengths. In order to realize high-sensitivity mm-VLBI observations in the East Asia region, we are promoting the HINOTORI (Hybrid Installation project in NObeyama, Triple-band ORIented) project, which aims to launch the wide-band and simultaneous triple-band (22/43/86 GHz) VLBI system with the Nobeyama 45 m Radio Telescope (NRO45). The simultaneous 22/43 GHz observation mode has already been operated for the open-use program. We have recently completed the performance evaluation of the receiver and observing system at 86 GHz. In addition, a new wide-band VLBI back-end system has been installed on the NRO45 and the performance of this receiving system has been found to be sufficient to meet scientific requirements. Currently, we are performing commissioning observations to establish regular VLBI operation with simultaneous triple-band mode together with the Korean VLBI Network. The participation of the NRO45 is expected to strengthen the mm-VLBI observation network in the East Asia region and to be a very powerful addition with respect to the science of of black hole jets.
