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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 Hydrodynamics of Pre-supernova Outbursts in Convective Red Supergiant Envelopes
Benny T. -H. Tsang, Daniel Kasen, Lars Bildsten
Eruptive mass loss likely produces the energetic outbursts observed from some massive stars before they undergo core-collapse supernovae (CCSNe). The resulting dense circumstellar…
Multi-Dimensional Radiative Transfer Calculations of Double Detonations of Sub-Chandrasekhar-Mass White Dwarfs
Ken J. Shen, Samuel J. Boos, Dean M. Townsley +1
Study of the double detonation Type Ia supernova scenario, in which a helium shell detonation triggers a carbon core detonation in a sub-Chandrasekhar-mass white dwarf, has experie…
Double Detonations with Thin, Modestly Enriched Helium Layers Can Make Normal Type Ia Supernovae
Dean M. Townsley, Broxton J. Miles, Ken J. Shen +1
It has been proposed that Type Ia supernovae (SNe Ia) that are normal in their spectra and brightness can be explained by a double detonation that ignites first in a helium shell o…
Photometric and Spectroscopic Properties of Type Ia Supernova 2018oh with Early Excess Emission from the 2 Observations
W. Li, X. Wang, J. Vinkó +160
Supernova (SN) 2018oh (ASASSN-18bt) is the first spectroscopically-confirmed type Ia supernova (SN Ia) observed in the field. The data revealed an excess emission…
Multidimensional Models of Type Ia Supernova Nebular Spectra: Strong Emission Lines from Stripped Companion Gas Rule Out Classic Single Degenerate Systems
Janos Botyanszki, Daniel Kasen, Tomasz Plewa
The classic single-degenerate model for the progenitors of Type Ia Supernova (SN Ia) predicts that the supernova ejecta should be enriched with solar-like abundance material stripp…
Optical and ultraviolet spectroscopic analysis of SN 2011fe at late times
Brian Friesen, E. Baron, Jerod T. Parrent +16
We present optical spectra of the nearby Type Ia supernova SN 2011fe at 100, 205, 311, 349, and 578 days post-maximum light, as well as an ultraviolet spectrum obtained with Hubble…
The Evolution and Fate of Super-Chandrasekhar Mass White Dwarf Merger Remnants
Josiah Schwab, Eliot Quataert, Daniel Kasen
We present stellar evolution calculations of the remnant of the merger of two carbon-oxygen white dwarfs (CO WDs). We focus on cases that have a total mass in excess of the Chandra…
Shock Breakout and Early Light Curves of Type II-P Supernovae Observed with Kepler
P. M. Garnavich, B. E. Tucker, A. Rest +4
We discovered two transient events in the Kepler field with light curves that strongly suggest they are type II-P supernovae. Using the fast cadence of the Kepler observations we p…
Super-Eddington Stellar Winds Driven by Near-Surface Energy Deposition
Eliot Quataert, Rodrigo Fernandez, Daniel Kasen +2
We develop analytic and numerical models of the properties of super-Eddington stellar winds, motivated by phases in stellar evolution when super-Eddington energy deposition (via, e…
XRF 100316D / SN 2010bh and the Nature of Gamma Ray Burst Supernovae
Z. Cano, D. Bersier, C. Guidorzi +21
We present ground-based and HST optical and infrared observations of XRF 100316D / SN 2010bh. It is seen that the optical light curves of SN 2010bh evolve at a faster rate than the…
Direct Confirmation of the Asymmetry of the Cas A Supernova with Light Echoes
A. Rest, R. J. Foley, B. Sinnott +21
We report the first detection of asymmetry in a supernova (SN) photosphere based on SN light echo (LE) spectra of Cas A from the different perspectives of dust concentrations on it…
Modeling the Diversity of Type Ia Supernova Explosions
F. K. Roepke, W. Hillebrandt, D. Kasen +1
Type Ia supernovae (SNe Ia) are a prime tool in observational cosmology. A relation between their peak luminosities and the shapes of their light curves allows to infer their intri…
Monte Carlo Radiative Transfer Simulations: Applications to Astrophysical Outflows and Explosions
S. A. Sim, M. Kromer, F. K. Roepke +4
The theory of radiative transfer provides the link between the physical conditions in an astrophysical object and the observable radiation which it emits. Thus accurately modelling…
Type Ia supernova science 2010-2020
D. A. Howell, A. Conley, M. Della Valle +47
In the next decade Type Ia supernovae (SNe Ia) will be used to test theories predicting changes in the Dark Energy equation of state with time. Ultimately this requires a dedicated…