Sub-mm VLBI observations of the event horizon of the super-massive black hole at the Galaxy center

银河系中心超大质量黑洞事件视界的亚毫米VLBI观测

• 批准号: 21244019
• 负责人: HONMA Mareki
• 金额: $ 8.49万
• 依托单位: National Astronomical Observatory of Japan
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (A)
• 财政年份: 2009
• 资助国家: 日本
• 起止时间: 2009 至 2011
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-21244019/
• 关键词: ブラックホール; サブミリ波; VLBI; 事象の地平線; 銀河系中心

In order to build a sub-mm VLBI array which is capable of resolving the event horizon scale of super-massive black holes, we have equipped ASTE telescope in Chile with instruments necessary for conducting sub-mm VLBI observations. Based on this, we have conducted international sub-mm VLBI observations including Chilean station for the first time. While fringes are yet to be detected with Chilean baselines and the results only provide an upper limit on the flux and brightness temperature of the source, based on observations with other baselines we have detected short-term variability of Sgr A in a scale of a few tens of the event horizon, providing us a new clue to understand detailed structures in the vicinity of the super-massive black hole.

为了建立一个能够分辨超大质量黑洞事件视界尺度的亚毫米VLBI阵列，我们在智利的ASTE望远镜上配备了进行亚毫米VLBI观测所需的仪器。在此基础上，我们首次进行了包括智利站在内的国际亚毫米VLBI观测。虽然智利基线尚未检测到条纹，并且结果仅提供了源的通量和亮度温度的上限，但基于其他基线的观测，我们已经检测到Sgr A的短期变化，范围为几十个事件视界，为我们提供了新的线索了解超大质量黑洞附近的详细结构。

项目成果

1.3 mm WAVELENGTH VLBI OF SAGITTARIUS A*: DETECTION OF TIME-VARIABLE EMISSION ON EVENT HORIZON SCALES

• DOI: 10.1088/2041-8205/727/2/l36
• 发表时间: 2010-11
• 期刊: The Astrophysical Journal Letters
• 作者: V. Fish;S. Doeleman;C. Beaudoin;R. Blundell;D. E. Bolin;G. Bower;R. Chamberlin;R. Freund;P. Frib

Current status of sub-mm VLBI with ASTE

亚毫米VLBI与ASTE的现状

• 发表时间: 2010
• 作者: J.Kato;T.Ozawa;E.Zubko;Shin-ichi Ohta;藤家 雪郎;Taizo Kanenobu;Honma M.
• 通讯作者: Honma M.

VLBI Monitoring of3C 84(NGC1275) in Early Phase of the2005Outburst

2005年爆发早期3C 84(NGC1275)的VLBI监测

• 发表时间: 2010
• 期刊: PASJ
• 作者: Nagai;Doi;Fujisawa;et al.
• 通讯作者: et al.

Astrometry of the Star-Forming Region IRAS 05137+3919 in the Far Outer Galaxy

• DOI: 10.1093/pasj/63.1.17
• 发表时间: 2011-01
• 期刊: Publications of the Astronomical Society of Japan
• 影响因子: 2.3
• 作者: M. Honma;T. Hirota;Y. Kan-ya;N. Kawaguchi;H. Kobayashi;T. Kurayama;Katsuhisa Sato

THE KCAL VERA 22 GHz CALIBRATOR SURVEY

• DOI: 10.1088/0004-6256/143/2/35
• 发表时间: 2011-07
• 期刊: The Astronomical Journal
• 作者: L. Petrov;M. Honma;S. Shibata