| Project/Area Number |
10640232
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Astronomy
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| Research Institution | Kagoshima University |
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Principal Investigator |
OMODAKA Toshihiro KAGOSHIMA UNIVERSITY, Faculty of Science, Professor, 理学部, 教授 (50129285)
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| Co-Investigator(Kenkyū-buntansha) |
KURODA Takehiko Nishi-Harima Astronomical Obserbatory, President, 台長
MORIMOTO Masaki KAGOSHIMA UNIVERSITY, Professor Emeritus, 名誉教授 (80012805)
NISHIO Masanori KAGOSHIMA UNIVERSITY, Faculty of Science, Associate Professor, 理学部, 助教授 (70135383)
UENO Munetaka Tokyo University, Assistant, 教養学部, 助手 (30242019)
SASAO Tetsuo National Astronomical Obserbatory, Professor, 教授 (20000177)
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| Project Period (FY) |
1998 – 1999
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| Project Status |
Completed (Fiscal Year 1999)
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| Budget Amount *help |
¥3,200,000 (Direct Cost: ¥3,200,000)
Fiscal Year 1999: ¥500,000 (Direct Cost: ¥500,000)
Fiscal Year 1998: ¥2,700,000 (Direct Cost: ¥2,700,000)
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| Keywords | late type star / water maser / VLBI / late Type star / maser / late type etar / Interferometer |
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| Research Abstract |
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.
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