Including a Luminous Central Remnant in Radiative Transfer Simulations for Type Iax Supernovae

Abstract

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 the light curves and spectra of intermediate-luminosity and bright SNe Iax. However, the model light curves decline too quickly after peak, particularly in red optical and near-infrared (NIR) bands. Deflagration models with a variety of ignition configurations do not fully unbind the WD, leaving a remnant polluted with ${}^{56}\mathrm{Ni}$. Emission from such a remnant may contribute to the luminosity of SNe Iax. Here we investigate the impact of adding a central energy source, assuming instantaneous powering by ${}^{56}\mathrm{Ni}$ decay in the remnant, in radiative transfer calculations of deflagration models. Including the remnant contribution improves agreement with the light curves of SNe Iax, particularly due to the slower post-maximum decline of the models. Spectroscopic agreement is also improved, with intermediate-luminosity and faint models showing greatest improvement. We adopt the full remnant ${}^{56}\mathrm{Ni}$ mass predicted for bright models, but good agreement with intermediate-luminosity and faint SNe Iax is only possible for remnant ${}^{56}\mathrm{Ni}$ masses significantly lower than those predicted. This may indicate that some of the ${}^{56}\mathrm{Ni}$ decay energy in the remnant does not contribute to the radiative luminosity but instead drives mass ejection, or that escape of energy from the remnant is significantly delayed. Future work should investigate the structure of remnants predicted by deflagration models and the potential roles of winds and delayed energy escape, as well as extend radiative transfer simulations to late times.

17 pages, 6 figures. Lightcurves and spectra available at https://hesma.h-its.org

References in corpus (56)

• WISeREP - An Interactive Supernova Data Repository
• Type Iax Supernovae: A New Class of Stellar Explosion
• SN 2002cx: The Most Peculiar Known Type Ia Supernova
• Three-dimensional pure deflagration models with nucleosynthesis and synthetic observables for Type Ia supernovae
• The Peculiar SN 2005hk: Do Some Type Ia Supernovae Explode as Deflagrations?
• 3D deflagration simulations leaving bound remnants: a model for 2002cx-like Type Ia supernovae
• SN 2008ha: An Extremely Low Luminosity and Extremely Low Energy Supernova
• Time-dependent 3D spectrum synthesis for type Ia supernovae
• A low energy core-collapse supernova without a hydrogen envelope
• Late-Time Spectroscopy of SN 2002cx: The Prototype of a New Subclass of Type Ia Supernovae
• Failed-Detonation Supernovae: Sub-Luminous Low-Velocity Ia Supernovae and Their Kicked Remnant White Dwarfs with Iron-Rich Cores
• The Extremes of Thermonuclear Supernovae
• Fallback Supernovae: A Possible Origin of Peculiar Supernovae with Extremely Low Explosion Energies
• Deflagrations in hybrid CONe white dwarfs: a route to explain the faint Type Iax supernova 2008ha
• One-dimensional delayed-detonation models of Type Ia supernovae: Confrontation to observations at bolometric maximum
• Comprehensive Observations of the Bright and Energetic Type Iax SN 2012Z: Interpretation as a Chandrasekhar Mass White Dwarf Explosion
• Carbon Ignition in Type Ia Supernovae: II. A Three-Dimensional Numerical Model
• Following multi-dimensional Type Ia supernova explosion models to homologous expansion
• Monte Carlo transition probabilities
• Monte Carlo techniques for time-dependent radiative transfer in 3-D supernovae
• Monte Carlo transition probabilities. II
• Reading the Spectra of the Most Peculiar Type Ia Supernova 2002cx
• The evolution of the peculiar Type Ia supernova SN 2005hk over 400 days
• Multi-dimensional simulations of radiative transfer in Type Ia supernovae
• High-Resolution Simulations of Convection Preceding Ignition in Type Ia Supernovae Using Adaptive Mesh Refinement
• Optical and Near-IR Observations of the Faint and Fast 2008ha-like Supernova 2010ae
• Nuclear Dominated Accretion Flows in Two Dimensions. I. Torus Evolution with Parametric Microphysics
• Possible Detection of the Stellar Donor or Remnant for the Type Iax Supernova 2008ha
• Spectra of supernovae in the nebular phase
• The type Iax supernova, SN 2015H: a white dwarf deflagration candidate
• Late-time Spectroscopy of Type Iax Supernovae
• Non-Local Thermodynamic Equilibrium Radiative Transfer Simulations of Sub-Chandrasekhar-Mass White Dwarf Detonations
• Hubble Space Telescope and Ground-Based Observations of the Type Iax Supernovae SN 2005hk and SN 2008A
• Nebular-Phase Spectra of Nearby Type Ia Supernovae
• The Subluminous Supernova 2007qd: A Missing Link in a Family of Low-Luminosity Type Ia Supernovae
• Polarisation spectral synthesis for Type Ia supernova explosion models
• Critical ingredients of supernova Ia radiative-transfer modeling
• Low Mach Number Modeling of Type Ia Supernovae. IV. White Dwarf Convection
• Wait for it: Post-supernova winds driven by delayed radioactive decays
• Double-Degenerate Carbon-Oxygen and Oxygen-Neon White Dwarf Mergers: A New Mechanism for Faint and Rapid Type Ia Supernovae
• Monte Carlo radiative transfer for the nebular phase of Type Ia supernovae
• Three-dimensional Simulations of Pure Deflagration Models for Thermonuclear Supernovae
• Interpreting the near-infrared spectra of the 'golden standard' Type Ia supernova 2005cf
• 3D radiative transfer kilonova modelling for binary neutron star merger simulations
• Spectroscopy of the Type Ia supernova 2011fe past 1000 days
• Still Brighter than Pre-Explosion, SN 2012Z Did Not Disappear: Comparing Hubble Space Telescope Observations a Decade Apart
• Explosive Nucleosynthesis in Near-Chandrasekhar-mass White Dwarf Models for Type Iax Supernovae: Dependence on Model Parameters
• SN 2019muj -- a well-observed Type Iax supernova that bridges the luminosity gap of the class
• SN 2020kyg and the rates of faint Iax Supernovae from ATLAS
• Extended Optical/NIR Observations of Type Iax Supernova 2014dt: Possible Signatures of a Bound Remnant
• Intermediate Luminosity Type Iax SN 2019muj With Narrow Absorption Lines: Long-Lasting Radiation Associated With a Possible Bound Remnant Predicted by the Weak Deflagration Model
• Modelling the ionisation state of Type Ia supernovae in the nebular-phase
• An analysis of the spectroscopic signatures of layering in the ejecta of type Iax supernovae
• Helium as a signature of the double detonation in Type Ia supernovae
• Over 500 Days in the Life of the Photosphere of the Type Iax Supernova SN 2014dt
• Properties of Type Iax Supernova 2019muj in the Late Phase: Existence, Nature and Origin of the Iron-rich Dense Core

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