The dark side of universe investigated with X-ray microcalorimeters

2016 Fiscal Year Final Research Report

• Project/Area Number: 25247028
• Research Category: Grant-in-Aid for Scientific Research (A)
• Allocation Type: Single-year Grants
• Section: 一般
• Research Field: Astronomy
• Research Institution: Japan Aerospace EXploration Agency
• Principal Investigator: MITSUDA KAZUHISA 国立研究開発法人宇宙航空研究開発機構, 宇宙科学研究所, 教授 (80183961)
• Co-Investigator(Kenkyū-buntansha): 藤本 龍一 金沢大学, 数物科学系, 准教授 (20280555) ; 太田 直美 奈良女子大学, 自然科学系, 准教授 (40391891)
• Project Period (FY): 2013-04-01 – 2017-03-31
• Keywords: 宇宙物理学 / X線宇宙物理学 / マイクロカロリメータ / 宇宙科学

Outline of Final Research Achievements

We pursued researches to obtain the best performance from the cutting edge X-ray spectrometer, SXS, and to prepare for its observations. Although the SXS observation was stopped in about a month by malfunction of the ASTRO-H spacecraft, the SXS instrument performed perfectly in orbit. We obtained a scientific result which suggests systematic errors introduced by the macroscopic motion of hot gas is not large in mass determination of cluster of galaxies, which is important for the study of dark energy using clusters We also performed X-ray searches of dark matter. We obtained most stringent constraint on the mixing angle of steel neutrinos in 1 to 20 keV mass range using the Galactic halo observations of Suzaku X-ray astronomy satellite.

Free Research Field

X線宇宙物理学