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HOLISMOKES -- III. Achromatic Phase of Strongly Lensed Type Ia Supernovae
S. Huber, S. H. Suyu, U. M. Noebauer +5
To use strongly lensed Type Ia supernovae (LSNe Ia) for cosmology, a time-delay measurement between the multiple supernova (SN) images is necessary. The sharp rise and decline of S…
AT2018kzr: the merger of an oxygen-neon white dwarf and a neutron star or black hole
James H. Gillanders, Stuart A. Sim, Stephen J. Smartt
We present detailed spectroscopic analysis of the extraordinarily fast-evolving transient AT2018kzr. The transient's observed lightcurve showed a rapid decline rate, comparable to…
Accretion Disc Winds in Tidal Disruption Events: Ultraviolet Spectral Lines as Orientation Indicators
Edward J. Parkinson, Christian Knigge, Knox S. Long +4
Some tidal disruption events (TDEs) exhibit blueshifted broad absorption lines (BALs) in their rest-frame ultraviolet (UV) spectra, while others display broad emission lines (BELs)…
White dwarf deflagrations for Type Iax supernovae: Polarisation signatures from the explosion and companion interaction
M. Bulla, Z. -W. Liu, F. K. Roepke +5
Growing evidence suggests that Type Iax supernovae might be the result of thermonuclear deflagrations of Chandrasekhar-mass white dwarfs in binary systems. We carry out Monte Carlo…
The lowest of the low: discovery of SN 2019gsc and the nature of faint Iax supernovae
Shubham Srivastav, Stephen J. Smartt, Giorgos Leloudas +15
We present the discovery and optical follow-up of the faintest supernova-like transient known. The event (SN 2019gsc) was discovered in a star-forming host at 53\,Mpc by ATLAS. A d…
SNe Ia from double detonations: Impact of core-shell mixing on the carbon ignition mechanism
Sabrina Gronow, Christine Collins, Sebastian T. Ohlmann +5
Sub-Chandrasekhar mass white dwarfs accreting a helium shell on a carbon-oxygen core are potential progenitors of normal Type Ia supernovae. This work focuses on the details of the…