Turbulently-driven deflagration-to-detonation transition in near-Chandrasekhar mass white dwarfs

Type Ia supernovae are luminous transients which enrich the interstellar medium with their nucleosynthetic products. They serve as crucial probes for observational cosmology, providing high-precision measurements of both the Hubble constant and cosmic acceleration. While multiple scenarios explaining type Ia supernovae have been proposed, a key physical process underpinning all channels is a detonation within the electron degenerate carbon-oxygen white dwarf interior. However, a first-principles understanding of how detonations are initiated in the turbulent conditions prevalent in SN Ia progenitors has remained elusive until now. In this work, we apply for the first time a laboratory-validated turbulently-driven deflagration-to-detonation (tDDT) mechanism to full 3D simulations of a near-Chandrasekhar mass carbon-oxygen white dwarf. We will present an analysis of the turbulently-driven flame propagation and characterize its local conditions at tDDT onset. We will also discuss the nucleosynthesis and the spectra that can be observed from tDDT-initiated type Ia supernovae events.