84 citations · 530 across the 26 of their papers we have counts for
26 papers
Multi-dimensional NLTE radiative transfer for a double detonation Type Ia explosion model in the photospheric phase
F. P. Callan, L. J. Shingles, S. A. Sim +7
Previous radiative transfer calculations have shown that both multi-dimensionality and NLTE (non local thermodynamic equilibrium) effects impact the synthetic observables predicted…
Late-time emission-line profiles from kilonova models
S. A. Sim, O. Just, Z. Xiong +10
Numerical simulations suggest that neutron star mergers eject material with complex, non-spherical density and composition distributions. Here we use two-dimensional configurations…
Observational signatures of thermonuclear electron-capture supernovae -- Ne II line strengthening and color evolution as traces of the explosion mechanism
Alexander Holas, Fionntan P. Callan, Samuel W. Jones +7
Thermonuclear electron-capture supernovae (tECSNe) are a potential fate of certain intermediate mass stars forming ONe cores at the end of their evolution. Simulations suggest that…
Nebular Fingerprints of a Violent White Dwarf Merger: 3D NLTE Modelling of Type Ia Supernovae
J. M. Pollin, R. Pakmor, L. J. Shingles +6
Binary systems composed of two carbon-oxygen white dwarfs (WDs) are a leading progenitor candidate for Type Ia supernovae. One widely discussed scenario is the dynamically driven d…
Exploring the diversity of kilonovae with 3D radiative transfer I. The polar direction
Christine E. Collins, Luke J. Shingles, Vimal Vijayan +7
We present 3D kilonova radiative transfer simulations for a series of binary neutron star merger models. The masses of the neutron stars are varied as well as the total mass of the…
Violent mergers revisited: The origin of the fastest stars in the Galaxy
Rüdiger Pakmor, Ken J. Shen, Aakash Bhat +12
Binary systems of two carbon-oxygen white dwarfs are one of the most promising candidates for the progenitor systems of Type Ia supernovae. Violent mergers, where the primary white…
The asymmetry of white dwarf double detonations and the observed scatter around the Phillips relation
Alexander Holas, Friedrich K. Roepke, Rüdiger Pakmor +6
Recent Type Ia supernova (SN Ia) simulations featuring a double detonation scenario have managed to reproduce the overall trend of the Phillips relation reasonably well. However, m…
Multi-messenger Gravitational Lensing
Graham P. Smith, Tessa Baker, Simon Birrer +38
We introduce the rapidly emerging field of multi-messenger gravitational lensing - the discovery and science of gravitationally lensed phenomena in the distant universe through the…
Non-LTE radiative transfer simulations: Improved agreement of the double detonation with normal Type Ia supernovae
Christine E. Collins, Luke J. Shingles, Stuart A. Sim +6
The double detonation is a widely discussed explosion mechanism for Type Ia supernovae, whereby a helium shell detonation ignites a secondary detonation in the carbon/oxygen core o…
Helium as an Indicator of the Neutron-Star Merger Remnant Lifetime and its Potential for Equation of State Constraints
Albert Sneppen, Oliver Just, Andreas Bauswein +9
The time until black hole formation in a binary neutron-star (NS) merger contains invaluable information about the nuclear equation of state (EoS) but has thus far been difficult t…
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…
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…
Helium features are inconsistent with the spectral evolution of the kilonova AT2017gfo
Albert Sneppen, Rasmus Damgaard, Darach Watson +3
The spectral features observed in kilonovae (KNe) reveal the elemental composition and the velocity structures of matter ejected from neutron star mergers. In the spectra of the ki…
Including a Luminous Central Remnant in Radiative Transfer Simulations for Type Iax Supernovae
F. P. Callan, S. A. Sim, C. E. Collins +6
Type Iax supernovae (SNe Iax) are proposed to arise from deflagrations of Chandrasekhar mass white dwarfs (WDs). Previous deflagration simulations have achieved good agreement with…
Towards inferring the geometry of kilonovae
Christine E. Collins, Luke J. Shingles, Andreas Bauswein +11
Recent analysis of the kilonova, AT2017gfo, has indicated that this event was highly spherical. This may challenge hydrodynamics simulations of binary neutron star mergers, which u…
Helium as a signature of the double detonation in Type Ia supernovae
Christine E. Collins, Stuart A. Sim, Luke. J. Shingles +5
The double detonation is a widely discussed mechanism to explain Type Ia supernovae from explosions of sub-Chandrasekhar mass white dwarfs. In this scenario, a helium detonation is…
Self-consistent 3D radiative transfer for kilonovae: directional spectra from merger simulations
Luke J. Shingles, Christine E. Collins, Vimal Vijayan +7
We present three-dimensional radiative transfer calculations for the ejecta from a neutron star merger that include line-by-line opacities for tens of millions of bound-bound trans…
StaNdaRT: A repository of standardized test models and outputs for supernova radiative transfer
Stéphane Blondin, Sergei Blinnikov, Fionntan P. Callan +26
We present the first results of a comprehensive supernova (SN) radiative-transfer (RT) code-comparison initiative (StaNdaRT), where the emission from the same set of standardized t…
3D radiative transfer kilonova modelling for binary neutron star merger simulations
Christine E. Collins, Andreas Bauswein, Stuart A. Sim +5
The detection of GW170817 and the accompanying electromagnetic counterpart, AT2017gfo, have provided an important set of observational constraints for theoretical models of neutron…
Double detonations: variations in Type Ia supernovae due to different core and He shell masses -- II: synthetic observables
Christine E. Collins, Sabrina Gronow, Stuart A. Sim +1
Double detonations of sub-Chandrasekhar mass white dwarfs are a promising explosion scenario for Type Ia supernovae, whereby a detonation in a surface helium shell triggers a secon…
Modelling the ionisation state of Type Ia supernovae in the nebular-phase
Luke J. Shingles, Andreas Flörs, Stuart A. Sim +4
The nebular spectra of Type Ia supernovae ( 100 days after explosion) consist mainly of emission lines from singly- and doubly-ionised Fe-group nuclei. However, theoret…
On the fate of the secondary white dwarf in double-degenerate double-detonation Type Ia supernovae
R. Pakmor, F. P. Callan, C. E. Collins +12
The progenitor systems and explosion mechanism of Type Ia supernovae are still unknown. Currently favoured progenitors include double-degenerate systems consisting of two carbon-ox…
Metallicity-dependent nucleosynthetic yields of Type Ia supernovae originating from double detonations of sub-M white dwarfs
Sabrina Gronow, Benoit Cote, Florian Lach +4
Double detonations in sub-Chandrasekhar mass carbon-oxygen white dwarfs with helium shell are a potential explosion mechanism for a Type Ia supernova (SNe Ia). It comprises a shell…
Double detonations of sub-Chandrasekhar mass CO white dwarfs: Can different core and He shell masses explain variations of Type Ia supernovae?
Sabrina Gronow, Christine E. Collins, Stuart A. Sim +1
Sub-Chandrasekhar mass carbon-oxygen white dwarfs (CO WDs) with a surface helium (He) shell have been proposed as progenitors of Type Ia supernovae (SNe Ia). If true, the resulting…