| Budget Amount *help |
¥18,980,000 (Direct Cost: ¥14,600,000、Indirect Cost: ¥4,380,000)
Fiscal Year 2014: ¥8,190,000 (Direct Cost: ¥6,300,000、Indirect Cost: ¥1,890,000)
Fiscal Year 2013: ¥8,190,000 (Direct Cost: ¥6,300,000、Indirect Cost: ¥1,890,000)
Fiscal Year 2012: ¥2,600,000 (Direct Cost: ¥2,000,000、Indirect Cost: ¥600,000)
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| Outline of Final Research Achievements |
In order to derive proper motion of materials around massive stars during their formation process, high-angular resolution VLBI observations were achieved toward thirty-six 6.7 GHz methanol maser sources using Japanese and East-Asian VLBI network. We found a rotating disk with expanding motion toward one source.
In order to derive fluctuations in velocity and intensity of 6.7 GHz methanol maser emission, we made single-dish monitoring observations toward 384 6.7 methanol maser sources using Hitachi and Takahagi 32-m radio telescopes. We newly found the following four activities: one source with sinusoidal fluctuation pattern of the intensity, another source with intermittent fluctuation pattern of the intensity, and the other 2 sources with bursting activity.
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