Oral Presentation

Numerical Study of White Dwarf Thermonucler Explosions Induced by Tidal Disruption Events

Author(s): Ataru Tanikawa (The University of Tokyo)

Presenter: Ataru Tanikawa (The University of Tokyo)

It is important to find intermediate mass black holes (IMBHs) by measuring black hole mass, since a few IMBHs have been observed so far. Tidal disruption events (TDEs) of white dwarfs (WDs) by IMBHs can be a clue to search for IMBHs. WD TDEs illuminate only IMBHs, since WDs are just swallowed by massive black holes. We have studied WD TDEs by numerical simulation, and have shown detonation emerges in the middle of WD TDEs, which is so-called ``tidal detonation''. The tidal detonation yields large amounts of radioactive nuclei, such as Nickel-56. WD TDEs will have radioactive luminosity powered by these nuclei, similarly to type Ia supernovae. We will present observational features of WD TDEs.