Type Iax supernovae from deflagrations in Chandrasekhar mass white dwarfs

Abstract

Due to the increasing number of observations Type Ia supernovae are nowadays regarded as a heterogeneous class of objects consisting of several subclasses. One of the largest of these is the class of Type Iax supernovae (SNe Iax) which have been suggested to originate from pure deflagrations in CO Chandrasekhar-mass white dwarfs (WDs). Although a few deflagration studies have been carried out, the full diversity of the class is not captured yet. We therefore present a parameter study of single-spot ignited deflagrations with varying ignition locations, central densities, metallicities and compositions. We also explore a rigidly rotating progenitor and carry out 3D hydrodynamic simulations, nuclear network calculations and radiative transfer. The new models extend the range in brightness covered by previous studies to the lower end. Our explosions produce ${}^{56}$Ni masses from $5.8\times 10^{-3}$ to $9.2\times 10^{-2}{M}_{\odot }$. In spite of the wide exploration of the parameter space the main characteristics of the models are primarily driven by the mass of ${}^{56}$Ni. Secondary parameters have too little impact to explain the observed trend among faint SNe~Iax. We report kick velocities of the bound explosion remnants from $6.9$ to $369.8$km$s^{-1}$. The wide exploration of the parameter space and viewing-angle effects in the radiative transfer lead to a significant spread in the synthetic observables. The trends towards the faint end of the class are, however, not reproduced. This motivates a quantification of the systematic uncertainties in the modeling procedure and the influence of the ${}^{56}$Ni-rich bound remnant. While the pure deflagration scenario remains a favorable explanation for bright and intermediate luminosity SNe~Iax, the possibility that SNe~Iax do not consist of a single explosion scenario needs to be considered.

27 pages, 17 figures, 3 tables, accepted for publication in A&A

References in corpus (41)

• Galactic chemical evolution: Carbon through Zinc
• Improved Distances to Type Ia Supernovae with Multicolor Light Curve Shapes: MLCS2k2
• Secondary Maximum in the Near-Infrared Lightcurves of Type Ia Supernovae
• SN 2005cs in M51 II. Complete Evolution in the Optical and the Near-Infrared
• The Peculiar SN 2005hk: Do Some Type Ia Supernovae Explode as Deflagrations?
• A three-dimensional deflagration model for Type Ia supernovae confronted with observations
• Late-Time Spectroscopy of SN 2002cx: The Prototype of a New Subclass of Type Ia Supernovae
• Deflagrations in hybrid CONe white dwarfs: a route to explain the faint Type Iax supernova 2008ha
• The impact of type Ia supernovae on main sequence binary companions
• Comprehensive Observations of the Bright and Energetic Type Iax SN 2012Z: Interpretation as a Chandrasekhar Mass White Dwarf Explosion
• ZTF Early Observations of Type Ia Supernovae I: Properties of the 2018 Sample
• Spectropolarimetry of the Peculiar Type Ia SN 2005hk
• An unusual white dwarf star may be a surviving remnant of a subluminous Type Ia supernova
• Multi-dimensional simulations of radiative transfer in Type Ia supernovae
• Neutronization During Type Ia Supernova Simmering
• Flame-driven deflagration-to-detonation transitions in Type Ia supernovae?
• Slow-Speed Supernovae from the Palomar Transient Factory: Two Channels
• Possible Detection of the Stellar Donor or Remnant for the Type Iax Supernova 2008ha
• The Reduction of the Electron Abundance during the Pre-explosion Simmering in White Dwarf Supernovae
• Non-Local Thermodynamic Equilibrium Radiative Transfer Simulations of Sub-Chandrasekhar-Mass White Dwarf Detonations
• Polarisation spectral synthesis for Type Ia supernova explosion models
• Partly burnt runaway stellar remnants from peculiar thermonuclear supernovae
• Hybrid C-O-Ne white dwarfs as progenitors of type Ia supernovae: dependence on Urca process and mixing assumptions
• Wait for it: Post-supernova winds driven by delayed radioactive decays
• Nucleosynthesis imprints from different Type Ia Supernova explosion scenarios and implications for galactic chemical evolution
• Investigating the diversity of supernovae type Iax: A MUSE and NOT spectroscopic study of their environments
• Monte Carlo radiative transfer for the nebular phase of Type Ia supernovae
• Transients from ONe White-Dwarf - Neutron-Star/Black-Hole Mergers
• Metallicity-dependent nucleosynthetic yields of Type Ia supernovae originating from double detonations of sub-M${}_{\text{Ch}}$ white dwarfs
• The white dwarf's carbon fraction as a secondary parameter of Type Ia supernovae
• 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
• Abundance Tomography of Type Iax SN 2011ay with TARDIS
• SN 2019muj -- a well-observed Type Iax supernova that bridges the luminosity gap of the class
• Velocity limits in the thermonuclear supernova ejection scenario for hypervelocity stars and the origin of US 708
• The interaction of Type Iax supernova ejecta with a helium companion star
• Detecting the signatures of helium in type Iax supernovae
• Sensitivity of Type Ia supernovae to electron capture rates
• 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
• WD0433+270: an old Hyades stream member or an Fe-core white dwarf?
• The remnant and origin of the historical supernova 1181AD