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Astrometric VLBI Observations of the Galactic LPVs, Miras, and OH/IR stars

Published online by Cambridge University Press:  16 July 2018

Akiharu Nakagawa ,
Tomoharu Kurayama ,
Gabor Orosz ,
Ross A. Burns ,
Tomoaki Oyama ,
Takumi Nagayama ,
Takashi Miyata ,
Mamoru Sekido ,
Junichi Baba  and
Kiichi Wada
Akiharu Nakagawa
Affiliation:
Kagoshima University, 1-21-35, Korimoto, Kagoshima-shi, Kagoshima, Japan email: nakagawa@sci.kagoshima-u.ac.jp
Tomoharu Kurayama
Affiliation:
Teikyo University of Science, 2-2-1 Sakuragi, Senjyu, Adachi-ku, Tokyo, Japan
Gabor Orosz
Affiliation:
Kagoshima University, 1-21-35, Korimoto, Kagoshima-shi, Kagoshima, Japan email: nakagawa@sci.kagoshima-u.ac.jp
Ross A. Burns
Affiliation:
Joint Institute for VLBI ERIC (JIVE), Postbus 2, 7990 AA Dwingeloo, the Netherlands
Tomoaki Oyama
Affiliation:
National Astronomical Observatory of Japan, Mizusawa VLBI Observatory, 2-12 Hoshigaoka-cho, Mizusawa-ku, Oshu, Iwate, Japan
Takumi Nagayama
Affiliation:
National Astronomical Observatory of Japan, Mizusawa VLBI Observatory, 2-12 Hoshigaoka-cho, Mizusawa-ku, Oshu, Iwate, Japan
Takashi Miyata
Affiliation:
Institute of Astronomy, The University of Tokyo, 2-21-1Osawa, Mitaka, Tokyo, Japan
Mamoru Sekido
Affiliation:
National Institute of Information and Communications Technology, Kashima Space Technology Center, 893-1 Hirai, Kashima, Ibaraki, Japan
Junichi Baba
Affiliation:
National Astronomical Observatory of Japan, 2-21-1 Osawa, Mitaka, Tokyo, Japan
Kiichi Wada
Affiliation:
Kagoshima University, 1-21-35, Korimoto, Kagoshima-shi, Kagoshima, Japan email: nakagawa@sci.kagoshima-u.ac.jp
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Abstract

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Studies of Galactic LPVs based on astrometric VLBI are presented. We use a VLBI array, “VERA”, to measure parallaxes and calibrate the K-band period luminosity relation (PLR) of the Galactic Miras. Since the PLR offers a distance indicator, its calibration is crucial to reveal their spatial distribution. Parallaxes of dozens of LPVs are presented. For the longer period stars, the mass-loss is high and the stars are obscured and recognized as OH/IR stars. We estimated mid-infrared absolute magnitudes of dozens of OH/IR stars and found that they show a loose concentration around −14 mag at λ of 11.6 μm, indicating an existence of PLR for OH/IR stars. Astrometry of OH/IR stars will also help us to study non-steady spiral arms as proposed from the latest simulation study of the galactic dynamics. We will start astrometric VLBI observation of two OH/IR stars NSV25875 and OH127.8+0.0 at 43 GHz with VERA.

Keywords

VLBIAstrometryMaserMiraOH/IRAGB
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 13 , Symposium S336: Astrophysical Masers: Unlocking the Mysteries of the Universe , September 2017 , pp. 365 - 368
Copyright
Copyright © International Astronomical Union 2018 

References

Asaki, Y., Deguchi, S., Imai, H., et al. 2010, APJ, 721, 267CrossRefGoogle Scholar
Baba, J., Saitoh, T. R., & Wada, K., 2013, APJ, 763, 46CrossRefGoogle Scholar
Choi, Y. K., Hirota, T., Honma, M., et al. 2008, PASJ, 60, 1007Google Scholar
Cutri, R. M., Skrutskie, M. F., van Dyk, S., et al. 2003, VizieR Online Data Catalog, 2246Google Scholar
Engels, D. & Bunzel, F., 2015, A&A, 582, A68Google Scholar
Engels, D., Etoka, S., Gérard, E., & Richards, A., 2015, Why Galaxies Care about AGB Stars III: A Closer Look in Space and Time, 497, 473Google Scholar
Feast, M. W., Glass, I. S., Whitelock, P. A., & Catchpole, R. M., 1989, mnras, 241, 375Google Scholar
Kamezaki, T., Nakagawa, A., Omodaka, T., et al. 2012, PASJ, 64, 7Google Scholar
Kamezaki, T., Kurayama, T., Nakagawa, A., et al. 2014, PASJ, 118Google Scholar
Kamezaki, T., Nakagawa, A., Omodaka, T., et al. 2015, PASJ, 208Google Scholar
Kamohara, R., Bujarrabal, V., Honma, M., et al. 2010, A&A, 510, A69Google Scholar
Kobayashi, H., et al. 2003, ASP Conference Series, 306, 48PGoogle Scholar
Kurayama, T., Sasao, T., & Kobayashi, H., 2005, APJ, 627, L49Google Scholar
Kusuno, K., Asaki, Y., Imai, H., & Oyama, T., 2013, APJ, 774, 107CrossRefGoogle Scholar
Min, C., Matsumoto, N., Kim, M. K., et al. 2014, PASJ, 66, 38Google Scholar
Nakagawa, A., Tsushima, M., Ando, K., et al. 2008, PASJ, 60, 1013Google Scholar
Nakagawa, A., Omodaka, T., Handa, T., et al. 2014, PASJ, 66, 101Google Scholar
Nakagawa, A., Kurayama, T., Matsui, M., et al. 2016, PASJ, 68, 78Google Scholar
Nyu, D., Nakagawa, A., Matsui, M., et al. 2011, PASJ, 63, 63Google Scholar
Vlemmings, W. H. T., van Langevelde, H. J., Diamond, P. J., Habing, H. J., & Schilizzi, R. T., 2003, A&A, 407, 213Google Scholar
Vlemmings, W. H. T. & van Langevelde, H. J., 2007, A&A, 472, 547Google Scholar
Whitelock, P. & Feast, M., 2000, MNRAS, 319, 759Google Scholar
Zhang, B., Reid, M. J., Menten, K. M., Zheng, X. W., & Brunthaler, A., 2012, A&A, 544, AA42Google Scholar