Precise measurements of black holes for studies of active galactic nuclei

2016 Fiscal Year Final Research Report

• Project/Area Number: 24340042
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Partial Multi-year Fund
• Section: 一般
• Research Field: Astronomy
• Research Institution: Japan Aerospace EXploration Agency
• Principal Investigator: DOI AKIHIRO 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, 助教 (90403641)
• Co-Investigator(Kenkyū-buntansha): 永井 洋 国立天文台, チリ観測所, 准教授 (00455198) ; 萩原 喜昭 東洋大学, 文学部, 准教授 (60399300) ; 紀 基樹 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, 研究員 (70531234)
• Co-Investigator(Renkei-kenkyūsha): HAGIWARA Yoshiaki 東洋大学, 文学部, 准教授 (60399300)
• Project Period (FY): 2012-04-01 – 2017-03-31
• Keywords: ブラックホール / 活動銀河 / 銀河 / 電波天文学 / 天文学 / 干渉計 / 電波干渉計 / 位相補償

Outline of Final Research Achievements

We tried to solve the "three fundamental problems" of black holes on active galactic nuclei (AGNs) through the "multi-frequency phase-referencing VLBI" method that implements position determination with accuracy comparable to the Schwarzschild radius (Rs) in addition to the direct imaging around black holes. As a result, (1) Is the primary energy source of Sgr A * and low luminosity AGN accretion disks? Jet? (2) Where is gamma-ray emitting areas in blazers and radio galaxies around black holes? (3) Spatial structure of mass accretion flow at the site near a black hole as the site of energy release? We obtained a lot of findings from the observational approach about the three problems.

Free Research Field

宇宙物理学