美濃島 薫 電気通信大学, 大学院情報理工学研究科, 教授 (20358112)
千葉 剛 日本大学, 文理学部, 教授 (40324602)
三澤 透 信州大学, 学術研究院総合人間科学系, 教授 (60513447)
稲場 肇 国立研究開発法人産業技術総合研究所, 計量標準総合センター, 研究グループ長 (70356492)
|Budget Amount *help
¥75,790,000 (Direct Cost: ¥58,300,000、Indirect Cost: ¥17,490,000)
Fiscal Year 2019: ¥10,790,000 (Direct Cost: ¥8,300,000、Indirect Cost: ¥2,490,000)
Fiscal Year 2018: ¥16,510,000 (Direct Cost: ¥12,700,000、Indirect Cost: ¥3,810,000)
Fiscal Year 2017: ¥21,320,000 (Direct Cost: ¥16,400,000、Indirect Cost: ¥4,920,000)
Fiscal Year 2016: ¥20,540,000 (Direct Cost: ¥15,800,000、Indirect Cost: ¥4,740,000)
Fiscal Year 2015: ¥6,630,000 (Direct Cost: ¥5,100,000、Indirect Cost: ¥1,530,000)
|Outline of Final Research Achievements
With an aim to directly detect the Cosmic Acceleration by TMT's very high dispersion spectrograph in collaboration with Astro-Comb, research & development of instruments and theoretical studies were performed. For accurate wavelength calibration, we succeeded in developing the world’s widest Astro comb which can cover 60% of the optical wavelength, using a fiber laser that has excellent robustness with a proven track record in a long-term operation. The Astro comb system was installed on the high-dispersion spectrograph of the Okayama 188cm telescope, successfully producing the spectrum and standing a long-time continuous operation.
In the theoretical study, we calculate the acceleration of the Solar System with respect to the Local Group of galaxies to quantify changes in the measured redshift due to local motion. We find that accelerations due to Large Magellanic Cloud and M31 cannot be ignored depending on lines of sight, while acceleration towards the Galactic Center dominates.