Hostname: page-component-cd9895bd7-gvvz8 Total loading time: 0 Render date: 2024-12-25T16:41:52.185Z Has data issue: false hasContentIssue false
  • English
  • Français

High-cadence 6.7 GHz methanol maser monitoring observations by Hitachi 32-m radio telescope

Published online by Cambridge University Press:  07 February 2024

Yoshinori Yonekura Open the ORCID record for Yoshinori Yonekura [Opens in a new window] ,
Yoshihiro Tanabe Open the ORCID record for Yoshihiro Tanabe [Opens in a new window]  and
Ren Moriizumi
Yoshinori Yonekura*
Affiliation:
Center for Astronomy, Ibaraki University, Mito, Ibaraki 310-8512, Japan.
Yoshihiro Tanabe
Affiliation:
Center for Astronomy, Ibaraki University, Mito, Ibaraki 310-8512, Japan.
Ren Moriizumi
Affiliation:
Graduate School of Science and Engineering, Ibaraki University, Mito, Ibaraki 310-8512, Japan
*
email: yoshinori.yonekura.sci@vc.ibaraki.ac.jp
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 started high-cadence monitoring observations of 6.7 GHz methanol masers from Dec. 2012 using Hitachi 32-m radio telescope (Yonekura et al.(2016). Observations have been conducted basically every day. On average, 13 hours of observations have been made per day, amounting to 4000–5000 hours per year. The cadence varies by sources: one observation in 1–50 days. In addition to already known 29 sources (Tanabe et al. 2023 and references therein), we have newly identified ∼20 sources with periodic flux variability. We have also detected 5 sources with sudden flux rises in 2019–2022, including G358.93–0.03 which was confirmed to be associated with the accretion burst.

Keywords

masersstars:formationstars:massivestars:flare
Type
Poster Paper
Information
Proceedings of the International Astronomical Union , Volume 18 , Symposium S380: Cosmic Masers: Proper Motion toward the Next-Generation Large Projects , December 2022 , pp. 269 - 272
Check for updates
Copyright
© The Author(s), 2024. Published by Cambridge University Press on behalf of International Astronomical Union

References

Caswell, J.L., et al. 2010, MNRAS, 404, 1029 10.1111/j.1365-2966.2010.16339.xCrossRefGoogle Scholar
Green, J.A., et al. 2010, MNRAS, 409, 913 10.1111/j.1365-2966.2010.17376.xCrossRefGoogle Scholar
Green, J.A., et al. 2012, MNRAS, 420, 3108 10.1111/j.1365-2966.2011.20229.xCrossRefGoogle Scholar
Pandian, J.D., et al. 2007, ApJ, 656, 255 10.1086/510512CrossRefGoogle Scholar
Tanabe, Y., Yonekura, Y., & MacLeod, G.C. 2023, PASJ, 75, 351 10.1093/pasj/psad002CrossRefGoogle Scholar
Xu, Y., et al. 2009, AA, 507, 1117 10.1051/0004-6361/200912135CrossRefGoogle Scholar
Yonekura, Y., et al. 2016, PASJ, 68, 74 10.1093/pasj/psw045CrossRefGoogle Scholar