Surface and core detonations in rotating white dwarfs

Abstract

The feasibility of the Double Detonation mechanism, -a surface Helium-detonation followed by the complete carbon detonation of the core-, in a rotating white dwarf with a mass $\simeq 1M_{\odot }$ is studied using three-dimensional hydrodynamic simulations. Assuming rigid rotation, the rotational speed is taken high enough as to considerably distort the initial spherical geometry of the white dwarf. Unlike spherically symmetric models, we found that when helium ignition is located far from the spinning axis the detonation fronts converge asynchronically at the antipodes of the igniting point. Nevertheless, the detonation of the carbon core still remains as the most probable outcome. The detonation of the core gives rise to a strong explosion, matching many of the basic observational constraints of Type Ia Supernova. We conclude that the Double Detonation mechanism also works when the white dwarf is spinning fast. This confirms the sub-Chandrasekhar-mass models and, maybe some Double Degenerate models (those having some helium fuel at the merging moment), as appealing channels to produce Type Ia Supernova events.

arXiv comment13 pages, 13 figures, 6 tables, submitted to ApJ

References in corpus (45)

• Type Ia Supernova Explosion Models
• Observational clues to the progenitors of Type-Ia supernovae
• The evolution of rotating stars
• The Reddening-Free Decline Rate Versus Luminosity Relationship for Type Ia Supernovae
• SPLASH: An interactive visualisation tool for Smoothed Particle Hydrodynamics simulations
• Double-detonation sub-Chandrasekhar supernovae: can minimum helium shell masses detonate the core?
• Faint Thermonuclear Supernovae from AM Canum Venaticorum Binaries
• Spectropolarimetry of Supernovae
• Detonations in Sub-Chandrasekhar Mass C+O White Dwarfs
• Sub-Chandrasekhar Mass Models For Type Ia Supernovae
• Helium-ignited violent mergers as a unified model for normal and rapidly declining Type Ia Supernovae
• Type Ia Supernova Explosion: Gravitationally Confined Detonation
• Double-detonation supernovae of sub-Chandrasekhar mass white dwarfs
• Surface Detonations in Double Degenerate Binary Systems Triggered by Accretion Stream Instabilities
• The Thermonuclear Explosion Of Chandrasekhar Mass White Dwarfs
• Synthetic Spectra of Hydrodynamic Models of Type Ia Supernovae
• Maximum Brightness and Post-Maximum Decline of Light Curves of SN~Ia: A Comparison of Theory and Observations
• 2D simulations of the double-detonation model for thermonuclear transients from low-mass carbon-oxygen white dwarfs
• Delay Times and Rates for Type Ia Supernovae and Thermonuclear Explosions from Double-detonation Sub-Chandrasekhar Mass Models
• Presupernova evolution of accreting white dwarfs with rotation
• The Initiation and Propagation of Helium Detonations in White Dwarf Envelopes
• A hybrid type Ia supernova with an early flash triggered by helium-shell detonation
• The Merger Rate of Binary White Dwarfs in the Galactic Disk
• Off-Center Carbon Ignition in Rapidly Rotating, Accreting Carbon-Oxygen White Dwarfs
• Spontaneous Initiation of Detonations in White Dwarf Environments: Determination of Critical Sizes
• Evidence for sub-Chandrasekhar-mass progenitors of Type Ia supernovae at the faint end of the width-luminosity relation
• Light and color curve properties of type Ia supernovae: Theory vs. Observations
• Type Ia Supernova models arising from different distributions of igniting points
• Multi-Dimensional Double Detonation of Sub-Chandrasekhar Mass White Dwarfs
• A one-parameter family of interpolating kernels for Smoothed Particle Hydrodynamics studies
• Helium accreting CO white dwarfs with rotation: helium novae instead of double detonation
• Improving smoothed particle hydrodynamics with an integral approach to calculating gradients
• The Internal Shear of Type Ia Supernova Progenitors During Accretion and Simmering
• Thermonuclear detonations ensuing white dwarf mergers
• Predicting polarization signatures for double-detonation and delayed-detonation models of Type Ia supernovae
• Light curves for off-centre ignition models of type Ia supernovae
• Conditions For Successful Helium Detonations In Astrophysical Environments
• Thermonuclear explosions of rapidly rotating white dwarfs - II. Detonations
• The Effects of Curvature and Expansion on Helium Detonations on White Dwarf Surfaces
• SPHYNX: an accurate density-based SPH method for astrophysical applications
• Thermonuclear explosions of rapidly rotating white dwarfs - I. Deflagrations
• Helium ignition in rotating magnetized CO white dwarfs leading to fast and faint rather than classical type Ia supernovae
• A young contracting white dwarf in the peculiar binary HD 49798/RX J0648.0--4418?
• Type Ia Supernovae: Can Coriolis force break the symmetry of the gravitational confined detonation explosion mechanism?
• Differentially Rotating White Dwarfs I: Regimes of Internal Rotation

Cited by in corpus (9)

• Observational Predictions for Sub-Chandrasekhar Mass Explosions: Further Evidence for Multiple Progenitor Systems for Type Ia Supernovae
• SNe Ia from double detonations: Impact of core-shell mixing on the carbon ignition mechanism
• Multi-Dimensional Parameter Study of Double Detonation Type Ia Supernovae Originating from Thin-Helium-Shell White Dwarfs
• White dwarfs in de Rham-Gabadadze-Tolley like massive gravity
• The Evolution of Helium Star Plus Carbon-Oxygen White Dwarf Binary Systems and Implications for Diverse Stellar Transients and Hypervelocity Stars
• Exploration of Aspherical Ejecta Properties in Type Ia Supernova: Progenitor Dependence and Applications to Progenitor Classification
• Properties and applications of a predicted population of runaway He-sdO/B stars ejected from single degenerate He-donor SNe
• Self-gravitating barotropic equilibrium configurations of rotating bodies with SPH
• Local two-dimensional simulations of the ignition of a helium shell detonation on a white dwarf by an impacting stream