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Daily monitor of Sagittarius A* at 22 GHz with the Japanese VLBI Network

Published online by Cambridge University Press:  22 May 2014

M. Tsuboi ,
Y. Asaki ,
Y. Yonekura ,
Y. Miyamoto ,
H. Kaneko ,
M. Seta ,
N. Nakai ,
O. Kameya ,
M. Miyoshi  and
H. Takaba
...Show all authors
M. Tsuboi
Affiliation:
Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency, 3-1-1 Yoshinodai, Chuo-ku, Sagamihara, Kanagawa 252-5210, Japan email: tsuboi@vsop.isas.jaxa.jp
Y. Asaki
Affiliation:
Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency, 3-1-1 Yoshinodai, Chuo-ku, Sagamihara, Kanagawa 252-5210, Japan email: tsuboi@vsop.isas.jaxa.jp
Y. Yonekura
Affiliation:
Center for Astronomy, Ibaraki University, 2-1-1 Bunkyo, Mito, Ibaraki 310-8512, Japan
Y. Miyamoto
Affiliation:
Center for Astronomy, Ibaraki University, 2-1-1 Bunkyo, Mito, Ibaraki 310-8512, Japan
H. Kaneko
Affiliation:
University of Tsukuba, 1-1-1 Ten-noudai, Tsukuba, Ibaraki 305-8571, Japan
M. Seta
Affiliation:
University of Tsukuba, 1-1-1 Ten-noudai, Tsukuba, Ibaraki 305-8571, Japan
N. Nakai
Affiliation:
University of Tsukuba, 1-1-1 Ten-noudai, Tsukuba, Ibaraki 305-8571, Japan
O. Kameya
Affiliation:
Mizusawa VLBI Observatory, National Astronomical Observatory of Japan, Mizusawa, Oshu, Iwate, 023-0861Japan
M. Miyoshi
Affiliation:
National Astronomical Observatory of Japan, Mitaka, Tokyo 181-8588, Japan
H. Takaba
Affiliation:
Gifu University, 1-1 Yanagido, Gifu, Gifu 501-1193, Japan
K. Wakamatsu
Affiliation:
Gifu University, 1-1 Yanagido, Gifu, Gifu 501-1193, Japan
Y. Fukuzaki
Affiliation:
Geospatial Information Authority of Japan, Tsukuba, Ibaraki 305-0811, Japan
T. Morimitsu
Affiliation:
The University of Tokyo, Bunkyo-ku, Tokyo 113-0033, Japan
K. Uehara
Affiliation:
The University of Tokyo, Bunkyo-ku, Tokyo 113-0033, Japan
M. Sekido
Affiliation:
National Institute of Information and Communications Technology, Kashima, Ibaraki 314-8501, Japan
T. Oka
Affiliation:
Keio University, Kohoku-ku, Yokohama, Kanagawa 223-8522, Japan
S. Takekawa
Affiliation:
Keio University, Kohoku-ku, Yokohama, Kanagawa 223-8522, Japan
T. Omodaka
Affiliation:
Kagoshima University, Kagoshima, Kagoshima, 890-0065, Japan
T. Handa
Affiliation:
Kagoshima University, Kagoshima, Kagoshima, 890-0065, Japan
A. Takumi
Affiliation:
The Open University of Japan, Mihama-ku, Chiba 261- 8586, Japan
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Abstract

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We have been monitoring the flux density of Sagittarius A* (Sgr A*) at 22 GHz since DOY=42 (11 Feb. 2013) with a sub-array of the Japanese VLBI Network in order to search the increase of 22-GHz emission from Sgr A* induced by the interaction of the G2 cloud with the accretion disk. The flux densities observed until DOY=322 (18 Nov. 2013) are consistent with the previously observed values before the approaching of the cloud. We have detected no large flare during this period.

Keywords

Galaxy: center — galaxies: active — galaxies: nuclei
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 9 , Symposium S303: The Galactic Center: Feeding and Feedback in a Normal Galactic Nucleus , October 2013 , pp. 382 - 384
Copyright
Copyright © International Astronomical Union 2014 

References

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