Exploration of Aspherical Ejecta Properties in Type Ia Supernova: Progenitor Dependence and Applications to Progenitor Classification

TL;DR

This study uses 2D hydrodynamics simulations to explore how different progenitor parameters influence the aspherical ejecta properties of Type Ia supernovae, aiming to improve classification and understanding of their origins.

Contribution

It introduces a systematic simulation approach to analyze the effects of ignition geometry and burning morphology on supernova ejecta asymmetry, linking models to observations.

Findings

Asymmetry in ejecta varies with ignition scenarios.

Simulation results help interpret SN 2014J observations.

Progenitor properties influence supernova morphology.

Abstract

Several explosions of thermonuclear supernovae (SNe Ia) have been found to exhibit deviations from spherical symmetry upon closer inspection. Examples are the gamma-ray lines from SN 2014J as measured by INTEGRAL/SPI, and morphology information from radioactive isotopes in older remnants such as Tycho. A systematic study on the effects of parameters such as ignition geometry and burning morphology in SNe Ia is still missing. We use a 2D hydrodynamics code with post-processing nucleosynthesis and simulate the double detonations in a sub-Chandrasekhar mass carbon-oxygen white dwarf starting from the nuclear runaway in the accumulated He envelope towards disruption of the white dwarf. We explore potential variety through four triggering scenarios that sample main asymmetry drivers. We further investigate their global effects on the aspherical structure of the ejecta based on individual elements. We apply the results to the well observed SN 2014J and other recently observed SN remnants in order to illustrate how these new observational data together with other observed quantities help to constrain the explosion and the progenitors of SNe Ia.