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Galactic Maser Astrometry with VERA

Published online by Cambridge University Press:  07 February 2024

Mareki Honma*
Affiliation:
National Astronomical Observatory of Japan, Oshu, Iwate 023-0861, Japan. University of Tokyo, Bunkyo, Tokyo 113-0033, Japan SOKENDA, Mitaka, Tokyo 181-8588, Japan
Tomoya Hirota
Affiliation:
National Astronomical Observatory of Japan, Oshu, Iwate 023-0861, Japan. SOKENDA, Mitaka, Tokyo 181-8588, Japan
Kazuya Hachisuka
Affiliation:
National Astronomical Observatory of Japan, Oshu, Iwate 023-0861, Japan.
Hiroshi Imai
Affiliation:
Kagoshima University, Kagoshima, Kagoshima 890-0065, Japan
Hideyuki Kobayashi
Affiliation:
National Astronomical Observatory of Japan, Oshu, Iwate 023-0861, Japan. SOKENDA, Mitaka, Tokyo 181-8588, Japan
Takaaki Jike
Affiliation:
National Astronomical Observatory of Japan, Oshu, Iwate 023-0861, Japan.
Akiharu Nakagawa
Affiliation:
Kagoshima University, Kagoshima, Kagoshima 890-0065, Japan
Tomoaki Oyama
Affiliation:
National Astronomical Observatory of Japan, Oshu, Iwate 023-0861, Japan.
Kazuyshi Sunada
Affiliation:
National Astronomical Observatory of Japan, Oshu, Iwate 023-0861, Japan.
Daisuke Sakai
Affiliation:
National Astronomical Observatory of Japan, Oshu, Iwate 023-0861, Japan.
Nobuyuki Sakai
Affiliation:
National Astronomical Research Institute of Thailand, Chiangmai 50180, Thailand
Aya Yamauchi
Affiliation:
National Astronomical Observatory of Japan, Oshu, Iwate 023-0861, Japan.

Abstract

VERA has been regularly conducting astrometry of Galactic maser sources for ∼ 20 years, producing more than 100 measurements of parallaxes and proper motions of star-forming regions as well as AGB stars. By combining the observational results obtained by VLBA BeSSeL, EVN, and LBA, maser astrometry provides a unique opportunity to explore the fundamental structure of the Galaxy. Here we present the view of the Galaxy revealed by the maser astrometry, and also discuss the importance of maser astrometry in the era of GAIA by comparing the results obtained by VLBI and GAIA. We also present our view of “proper motions toward the future” of the relevant field, expected in the next decade based on global collaborations.

Type
Contributed Paper
Copyright
© The Author(s), 2024. Published by Cambridge University Press on behalf of International Astronomical Union

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References

Akiyama, K., et al. 2023, Galaxies, 10, 113 CrossRefGoogle Scholar
Do, T., et al. 2019, Science, 365, 664 CrossRefGoogle Scholar
GAIA collaboration, Drimmel, R., et al. 2023, A&A, 674, 37Google Scholar
GAIA collaboration, Vallenari, A., et al. 2023, A&A, 674, 1Google Scholar
Collaboration, Gravity 2019, A&A, 625, L10 Google Scholar
Hachisuka, K., et al. 2006, ApJ, 645, 337 CrossRefGoogle Scholar
Hirota, T., et al. 2007, PASJ, 59, 897 CrossRefGoogle Scholar
Hirota, T., et al. 2020, PASJ, 72, 50 Google Scholar
Honma, M., et al. 2007, PASJ, 59, 889 CrossRefGoogle Scholar
Honma, M., et al. 2012, PASJ, 64, 136 CrossRefGoogle Scholar
Hyland, L., et al. 2022, ApJ, in pressGoogle Scholar
Immer, K. & Rygl, K. 2022, Universe review, 8, 390 CrossRefGoogle Scholar
Krishnan, V., et al. 2015, ApJ, 805, 129 CrossRefGoogle Scholar
Krishnan, V., et al. 2017, MNRAS, 465, 1095 CrossRefGoogle Scholar
Matsuno, M., et al. 2020, PASJ, 72, 56 CrossRefGoogle Scholar
Nakagawa, A., et al. 2019, Proceedings of the IAU symposium, 343, 476 Google Scholar
Rioja, M. & Dodson, R. 2020, A&AR, 28, 6 Google Scholar
Reid, M. J. & Honma, M. 2014, ARAA, 52, 339 CrossRefGoogle Scholar
Reid, M. J., et al. 2009, ApJ, 700, 137 CrossRefGoogle Scholar
Reid, M. J., et al. 2014, ApJ, 783, 130 CrossRefGoogle Scholar
Reid, M. J., et al. 2019, ApJ, 885, 131 CrossRefGoogle Scholar
Reid, M. J. 2022, AJ, 164, 133 CrossRefGoogle Scholar
Sanna, A., et al. 2017, Science, 358, 227 CrossRefGoogle Scholar
Sakai, N., et al. 2020, PASJ, 72, 53 CrossRefGoogle Scholar
Sakai, N., et al. 2023, PASJ, 75, 208 CrossRefGoogle Scholar
Sudoh, H., et al. 2019, PASJ, 71, 16 CrossRefGoogle Scholar
Tao, A., Sohn, B. W. & Imai, H. 2018, Nature Astronomy, 2, 118 Google Scholar
Xu, Y., et al. 2006, Science, 311, 54 CrossRefGoogle Scholar
Xu, S., et al. 2019, ApJ, 875, 114 CrossRefGoogle Scholar
Yamauchi, A., et al. 2016, PASJ, 68, 80 Google Scholar