Axions around rotating black holes
- 2021年11月12日(金)14:00 - 16:00 (JST)
- 吉野 裕高 (神戸大学 大学院理学研究科 物理学専攻 宇宙論研究室)
- via Zoom
String theories indicate the existence of many axionlike scalar fields with light masses in addition to the QCD axion. If this is the case, an axion field around a rotating black hole extracts the energy of the black hole by the mechanism called the “superradiant instability”. Then, every astrophysical black hole is expected to wear a cloud of the axion. In this talk, I would like to give an overview on this topic, and introduce our numerical studies on the phenomena caused by the axion cloud at the last stage of the superradiant instability where the self-interaction of axions becomes important.