OBSERVATIONAL STUDIES OF THE PROCESS OF MASS OUTFLOW IN LATE TYPE STARS

晚型恒星质量外流过程的观测研究

• 批准号: 10640232
• 负责人: OMODAKA Toshihiro
• 金额: $ 2.05万
• 依托单位: Kagoshima University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 1998
• 资助国家: 日本
• 起止时间: 1998 至 1999
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-10640232/
• 关键词: late type star; water maser; VLBI; late Type star; maser; late type etar; Interferometer

The purpose of this research is to study the mechanism of mass outflow from late type stars by doing monitoring observations of water masers during several years. For this, we have observed three late type stars, such as IRC60169, VX Sgr, R Crt, by using domestic VLBI network called J Net. The data of IRC60169 and R Crt were already analyzed. We have found the new results on the life time and proper motions of water maser spots. We have already written a paper for the result of R Crt. It will be submitted soon. For the data of both IRC60169 and VX Sgr, we are now analyzing. Also we have continued the single dish monitoring observations of water maser sources by using 6m telescope at Kagoshima. These results and data are favorable for the VERA project which will start from this year.During these observations, we have discovered a spectacular flare in the water-vapor maser emission from the Orion KL by using 6m telescope. The flare continued to increase in intensity exponentially and had a flux density greater than 4x106 Jy. The results were already published. We also tried to VLBI monitoring observations of this flare by using UBA. The data were already analyzed and very interesting results are found. We are now preparing manuscript on these results. The observation of optical and infrared radiation emitted from late type stars does not make a prominent progress. However the new constructed infrared camera shows a high stability. From this April we started infrared observations.

本研究的目的是通过对水脉泽的多年监测观测，研究晚型星物质外流的机制。为此，我们利用国内VLBI观测网J Net观测了IRC60169、VX Sgr、R Crt等三颗晚型星。对IRC60169和RCrt的数据进行了分析。我们得到了水脉泽斑寿命和自行的新结果。我们已经为R Crt的结果写了一篇论文。很快就会提交。对于IRC60169和VX Sgr的数据，我们现在正在分析。我们还利用鹿儿岛6米望远镜继续进行了水脉泽源的单碟监测观测。这些结果和数据对今年开始的VERA计划是有利的。在这些观测中，我们用6米望远镜在Orion KL的水汽脉泽发射中发现了一个壮观的耀斑。耀斑的强度继续呈指数增长，通量密度超过4x106 Jy。结果已经公布了。我们还尝试用乌巴对这次耀斑进行VLBI监测。我们已经对数据进行了分析，并发现了非常有趣的结果。我们现在正在准备这些结果的手稿。晚型星的光辐射和红外辐射的观测没有取得显著的进展。然而，新构造的红外相机显示出高稳定性。从今年4月开始，我们开始了红外观测。

项目成果

今井 裕 他: "Kinematics and distance of mater masers in W3 IRS5"Astrophysical Journal. (in press). (2000)

Yutaka Imai 等人：“W3 IRS5 中的物质脉泽的运动学和距离”天体物理学杂志（2000 年）。

Toshihiro Omodaka 外: "The Enormous Outburst of the 7.9km s-1 Water-Maser Feature in Orion KL"Publications of the Astronomical Society or Japan. 51. 333-336 (1999)

Toshihiro Omodaka：“Orion KL 7.9km s-1 Water-Maser 特征的巨大爆发”日本天文学会出版物 51. 333-336 (1999)。

面高 俊宏 他: "Feature in Orion KL the enormous outburst of the 7.9 Kms^<-1> water maser"Publi. Astron. Soc. Japan. 51. 333-336 (1999)

Toshihiro Mendaka 等人：“Orion KL 的 7.9 Kms^<-1> 水脉泽爆发特征”Soc. 51. 333-336 (1999)

Masanori Nishio et al.: "Real-time VLBI System using Telephone Network for On-line System Diagnosis"Proceedings of SPIE, Astronomical Telescope and Instrumentation. (in press). (2000)

Masanori Nishio 等人：“使用电话网络进行在线系统诊断的实时 VLBI 系统”SPIE、天文望远镜和仪器仪表会议录。

Sasao, T: "Phase compensation experiment with the Paired Antenna Method, 2 Millimeter-Wave Fringe Correction using centimaterwave Raterence" Radio Science. 33・5. 1297-1318 (1998)

Sasao，T：“使用成对天线方法进行相位补偿实验，使用厘米波速率进行 2 毫米波条纹校正”《无线电科学》33・5（1998 年）。