Effects of supercritical accretion on the cosmological growth of supermassive black holes

2016 Fiscal Year Final Research Report

• Project/Area Number: 26400229
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Astronomy
• Research Institution: Kyoto University
• Principal Investigator: Mineshige Shin 京都大学, 理学研究科, 教授 (70229780)
• Co-Investigator(Renkei-kenkyūsha): OHSUGA Ken 国立天文台, 理論研究部, 助教 (90386508)
• Project Period (FY): 2014-04-01 – 2017-03-31
• Keywords: ブラックホール天文学 / 降着流 / アウトフロー / 輻射流体力学 / 輻射輸送 / パルサー / X線分光 / 一般相対性理論

Outline of Final Research Achievements

We have been working on multi-dimensional radiation-hydrodynamic simulations of supercritical accretion, accretion flow onto compact objects at rates exceeding the classical limit, and have so far clarified its various unique features, such as clumpy outflow. Here, we focus on the effects of supercritical accretion on the cosmological evolution of black holes, and (1) found eruption of neutral outflow from an intermediate-mass black hole via radiation feedback, (2) reproduced the enigmatic hard X-ray spectra by calculating deformation of spectra by multiple Compton scatterings, and (3) performed numerical simulations of accretion onto binary black holes. Finally, we also clarified the central engine of the Ultraluminous X-ray pulsars by calculating the flow dynamics of supercritical accretion column.

Free Research Field

ブラックホール天文学