Tidal double detonation: a new mechanism for a thermonuclear explosion of a white dwarf induced by a tidal disruption event

Abstract

We suggest "tidal double detonation": a new mechanism for a thermonuclear explosion of a white dwarf (WD) induced by a tidal disruption event (TDE). Tidal detonation is also a WD explosion induced by a TDE. In this case, helium (He) and carbon-oxygen (CO) detonation waves incinerate He~WD and CO~WD, respectively. On the other hand, for tidal double detonation, He detonation is first excited in the He shell of a CO~WD, and drives CO detonation in the CO core. We name this mechanism after the double detonation scenario in the context of type Ia supernovae. In this paper, we show tidal double detonation occurs in shallower encounter of a CO~WD with an intermediate mass black hole (IMBH) than simple tidal detonation, performing numerical simulations for CO~WDs with $0.60M_{\odot }$ with and without a He shell. We expect tidal double detonation spreads opportunity to WD~TDEs illuminating IMBHs.

6 pages, 5 figures, accepted for publication in MNRAS

References in corpus (5)

• Faint Thermonuclear Supernovae from AM Canum Venaticorum Binaries
• A hybrid type Ia supernova with an early flash triggered by helium-shell detonation
• Early 56Ni decay γ-rays from SN2014J suggest an unusual explosion
• Testing the white dwarf mass-radius relationship with eclipsing binaries
• Simulating Black Hole White Dwarf Encounters

Cited by in corpus (5)

• Double-Detonation Models for Type Ia Supernovae: Trigger of Detonation in Companion White Dwarfs and Signatures of Companions' Stripped-off Materials
• A Model for Fast Blue Optical Transient AT2018Cow: Circumstellar Interaction of a Pulsational Pair-instability Supernova
• Tidal Disruptions of White Dwarfs: Theoretical Models and Observational Prospects
• MOCCA-SURVEY Database -- I. Tidal disruption events of white dwarfs in globular clusters and young massive clusters
• Simulations of Tidal Disruption Events