Hostname: page-component-cd9895bd7-jkksz Total loading time: 0 Render date: 2024-12-22T07:26:18.525Z Has data issue: false hasContentIssue false
  • English
  • Français

The 3-mm flux density monitoring of Sagittarius A* with the ATCA

Published online by Cambridge University Press:  01 October 2007

J. Li ,
Z. Q. Shen ,
A. Miyazaki ,
M. Miyoshi ,
T. Tsutsumi ,
M. Tsuboi ,
L. Huang  and
B. Sault
J. Li
Affiliation:
Shanghai Astronomical Observatory, Chinese Academy of Sciences, Shanghai 200030, China email: lijuan@shao.ac.cn Graduate School of the Chinese Academy of Sciences, Beijing 100039, China
Z. Q. Shen
Affiliation:
Shanghai Astronomical Observatory, Chinese Academy of Sciences, Shanghai 200030, China email: lijuan@shao.ac.cn Joint Institute for Galaxy and Cosmology of ShAO and USTC, Shanghai 200030, China
A. Miyazaki
Affiliation:
National Astronomical Observatory of Japan, 2-21-1 Osawa, Mitaka, Tokyo 181-8588, Japan
M. Miyoshi
Affiliation:
National Astronomical Observatory of Japan, 2-21-1 Osawa, Mitaka, Tokyo 181-8588, Japan
T. Tsutsumi
Affiliation:
National Astronomical Observatory of Japan, 2-21-1 Osawa, Mitaka, Tokyo 181-8588, Japan
M. Tsuboi
Affiliation:
Institute of Space and Astronautical Science, Sagamihara, Kanagawa 229-8510, Japan
L. Huang
Affiliation:
Shanghai Astronomical Observatory, Chinese Academy of Sciences, Shanghai 200030, China email: lijuan@shao.ac.cn Graduate School of the Chinese Academy of Sciences, Beijing 100039, China
B. Sault
Affiliation:
University of Melbourne, School of Physics, Parkville, Victoria 3052, Australia
Rights & Permissions [Opens in a new window]

Abstract

Core share and HTML view are not available for this content. However, as you have access to this content, a full PDF is available via the ‘Save PDF’ action button.

We have performed monitoring observations of the 3-mm flux density toward the Galactic center compact radio source Sgr A* with the ATCA since 2005 October. It has been found that during several observing epochs Sgr A* was quite active, showing significant intraday variation. Here we report the detection of an IDV in Sgr A* on 2006 August 13, which exhibits a 27% fractional variation in about 2 hrs.

Keywords

Galaxy: centertechniques: interferometric
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 3 , Symposium S248: A Giant Step: from Milli- to Micro-arcsecond Astrometry , October 2007 , pp. 204 - 205
Copyright
Copyright © International Astronomical Union 2008

References

Baganoff, F. K., et al. 2001, Nature, 413, 45Google Scholar
Genzel, R., et al. 2003, Nature, 425, 934CrossRefGoogle Scholar
Marrone, D. P., Moran, J., Zhao, J.-H., & Rao, R. 2006, ApJ, 640, 308Google Scholar
Mauerhan, J. C., Morris, M., Walter, F., & Baganoff, F. 2005, ApJ, 623, L25Google Scholar
Miyazaki, A., Tsutsumi, T., & Tsuboi, M. 2004, ApJ, 611, L97Google Scholar
Yusef-Zadeh, F., et al. 2006, ApJ, 650, 189CrossRefGoogle Scholar