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Article

HINOTORI and Its Perspectives in the Black-Hole Jet Study

by
Toshihisa Tsutsumi
1,†,
Kotaro Niinuma
1,2,*,†,
Hiroshi Imai
3,4,†,
Ryoko Amari
1,†,
Yusuke Shimizu
1,†,
Hideo Ogawa
5,†,
Atsushi Nishimura
6,
Chieko Miyazawa
6,
Tomoaki Oyama
7,
Hiroyuki Kaneko
8,9,
Keisuke Nakashima
10,
Satoko Sawada-Satoh
5 and
Takahiro Aoki
2
1
Graduate School of Sciences and Technology for Innovation, Yamaguchi University, 1677-1 Yoshida, Yamaguchi 753-8512, Yamaguchi, Japan
2
The Research Institute for Time Studies, Yamaguchi University, 1677-1 Yoshida, Yamaguchi 753-8511, Yamaguchi, Japan
3
Amanogawa Galaxy Astronomy Research Center, Graduate School of Science and Engineering, Kagoshima University, 1-21-24 Korimoto, Kagoshima 890-8580, Kagoshima, Japan
4
Center for General Education, Institute for Comprehensive Education, Kagoshima University, 1-21-24 Korimoto, Kagoshima 890-8580, Kagoshima, Japan
5
Graduate School of Science, Osaka Metropolitan University, 1-1 Gakuen-cho, Nakaku, Sakai 599-8531, Osaka, Japan
6
Nobeyama Radio Observatory, National Astronomical Observatory of Japan, 462-2 Nobeyama, Minamimaki, Minamisaku 384-1305, Nagano, Japan
7
Mizusawa VLBI Observatory, National Astronomical Observatory of Japan, 2-12 Hoshigaoka-cho, Mizusawa-ku, Oshu 023-0861, Iwate, Japan
8
Graduate School of Education, Joetsu University of Education, 1 Yamayashiki-machi, Joetsu 943-8512, Niigata, Japan
9
National Astronomical Observatory of Japan, 2-21-1 Osawa, Mitaka 181-8588, Tokyo, Japan
10
Department of Physics and Astronomy, Faculty of Science, Kagoshima University, 1-21-24 Korimoto, Kagoshima 890-8580, Kagoshima, Japan
*
Author to whom correspondence should be addressed.
†
These authors contributed equally to this work.
Galaxies 2023, 11(1), 30; https://doi.org/10.3390/galaxies11010030
Submission received: 19 December 2022 / Revised: 4 February 2023 / Accepted: 9 February 2023 / Published: 13 February 2023
(This article belongs to the Special Issue Challenges in Understanding Black Hole Powered Jets with VLBI)
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Abstract

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.
Keywords: very long baseline interferometry; active galactic nucleus; supermassive black holes; absorption lines; evolved star; emission-lines very long baseline interferometry; active galactic nucleus; supermassive black holes; absorption lines; evolved star; emission-lines

Share and Cite

MDPI and ACS Style

Tsutsumi, T.; Niinuma, K.; Imai, H.; Amari, R.; Shimizu, Y.; Ogawa, H.; Nishimura, A.; Miyazawa, C.; Oyama, T.; Kaneko, H.; et al. HINOTORI and Its Perspectives in the Black-Hole Jet Study. Galaxies 2023, 11, 30. https://doi.org/10.3390/galaxies11010030

AMA Style

Tsutsumi T, Niinuma K, Imai H, Amari R, Shimizu Y, Ogawa H, Nishimura A, Miyazawa C, Oyama T, Kaneko H, et al. HINOTORI and Its Perspectives in the Black-Hole Jet Study. Galaxies. 2023; 11(1):30. https://doi.org/10.3390/galaxies11010030

Chicago/Turabian Style

Tsutsumi, Toshihisa, Kotaro Niinuma, Hiroshi Imai, Ryoko Amari, Yusuke Shimizu, Hideo Ogawa, Atsushi Nishimura, Chieko Miyazawa, Tomoaki Oyama, Hiroyuki Kaneko, and et al. 2023. "HINOTORI and Its Perspectives in the Black-Hole Jet Study" Galaxies 11, no. 1: 30. https://doi.org/10.3390/galaxies11010030

APA Style

Tsutsumi, T., Niinuma, K., Imai, H., Amari, R., Shimizu, Y., Ogawa, H., Nishimura, A., Miyazawa, C., Oyama, T., Kaneko, H., Nakashima, K., Sawada-Satoh, S., & Aoki, T. (2023). HINOTORI and Its Perspectives in the Black-Hole Jet Study. Galaxies, 11(1), 30. https://doi.org/10.3390/galaxies11010030

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