3 papers
astro-ph.HE2024
Exploring the range of impacts of helium in the spectra of double detonation models for Type Ia supernovae
F. P. Callan, C. E. Collins, S. A. Sim +7
Models of sub-Chandrasekhar mass double detonations for Type Ia supernovae (SNe Ia) suggest a distinguishing property of this scenario is unburnt helium in the outer ejecta. Howeve…
astro-ph.HE2024
On the fate of the secondary white dwarf in double-degenerate double-detonation Type Ia supernovae -- II. 3D synthetic observables
J. M. Pollin, S. A. Sim, R. Pakmor +5
A leading model for Type Ia supernovae involves the double-detonation of a sub-Chandrasekhar mass white dwarf. Double-detonations arise when a surface helium shell detonation gener…
astro-ph.HE2023
Unprecedented early flux excess in the hybrid 02es-like type Ia supernova 2022ywc indicates interaction with circumstellar material
Shubham Srivastav, T. Moore, M. Nicholl +20
We present optical photometric and spectroscopic observations of the 02es-like type Ia supernova (SN) 2022ywc. The transient occurred in the outskirts of an elliptical host galaxy…