| Budget Amount *help |
¥11,050,000 (Direct Cost: ¥8,500,000、Indirect Cost: ¥2,550,000)
Fiscal Year 2016: ¥2,340,000 (Direct Cost: ¥1,800,000、Indirect Cost: ¥540,000)
Fiscal Year 2015: ¥2,470,000 (Direct Cost: ¥1,900,000、Indirect Cost: ¥570,000)
Fiscal Year 2014: ¥3,120,000 (Direct Cost: ¥2,400,000、Indirect Cost: ¥720,000)
Fiscal Year 2013: ¥3,120,000 (Direct Cost: ¥2,400,000、Indirect Cost: ¥720,000)
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| Outline of Final Research Achievements |
We have carried out near-infrared monitoring observations of the Galactic supermassive black hole, using the IRSF telescope in South Africa. The closest approach of a gas cloud to the supermassive black hole was in around March/April 2013, and flares from the black hole was expected. However, during our monitoring from 2013 to 2015, no clear flaring was detected. The K-band magnitudes of the black hole are fainter than 12 during the period. Our result is consistent with other monitoring observations in radio and X-ray wavelengths.
Using the same data sets, we have searched for variable stars in the central 7 arcmin region of our Galaxy. We have found new variable star candidates: 10 Mira variable stars, and one Cepheid variable. They are previously unknown variable stars.
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