Double-detonation sub-Chandrasekhar supernovae: can minimum helium shell masses detonate the core?

By M. Fink, Friedrich K. Röpke, W. Hillebrandt, I. Seitenzahl, S. Sim, M. Kromer. 2010

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The explosion of sub-Chandrasekhar mass white dwarfs via the double detonation scenario is a potential explanation for type Ia supernovae. In this scenario, a surface detonation in a heli um layer initiates a detonation in the underlying carbon/oxygen core leading to an explosion. For a given core mass, a lower bound has been determined on the mass of the helium shell required for dynamical burning during a helium flash, which is a necessary prerequis ite for detonation. For a range of core and corresponding minimum helium shell masses, we investigate whether an assumed surface helium detonation is capable of triggering a subsequent detonation in the core even for this limiting case. We carried out hydrodynamic simulations on a co-expanding Eulerian grid in two dimensions assuming rotational symmetry. The detonations are propagated using the level-set approach and a simplified scheme for n uclear reactions that has been calibrated with a large nuclear network. The same network is used to determine detailed nucleosynthetic abundances in a post-processing step. Based on approximate detonation initiation criteria in the literature, we find th at secondary core

Subfields: Astronomy and Astrophysics

View Paper: https://www.semanticscholar.org/paper/8274d9c026cdb86260a430beb1d9908da10401b3

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Citations in the corpus

Violent mergers of nearly equal-mass white dwarf as progenitors of subluminous Type Ia supernovae (2011, background): “Note that a thermonuclear explosion may also be possible before the white dwarf reaches the Chandrasekhar-mass if the carbonoxygen white dwarf accretes helium from a non-degenerate or white dwarf companion (Fink et al. 2007, 2010; Sim et al. 2010; Guillochon et al. 2010).”
NEUTRON-RICH CHROMIUM ISOTOPE ANOMALIES IN SUPERNOVA NANOPARTICLES (2010, methodology): “…measured isotopic ratios with total yields, they could be compared with nucleosynthetic predictions for tracer particles in multi-dimensional simulations of SNIa explosions (Travaglio et al. 2004, 2005; Brown et al. 2005; Röpke et al. 2006; Meakin et al. 2009; Fink et al. 2010; Maeda et al. 2010).”
3D deflagration simulations leaving bound remnants: a model for 2002cx-like Type Ia supernovae (2012, background): “Normal SNe Ia would then originate from other progenitors like double-degenerate mergers (e.g. Pakmor et al. 2012; Ruiter et al. 2012) or sub-Chandrasekharmass double detonations (e.g. Fink et al. 2010; Kromer et al. 2010; Woosley & Kasen 2011).”
THE LONG-TERM EVOLUTION OF DOUBLE WHITE DWARF MERGERS (2011, background): “The double detonation scenario has received more attention recently due to the prediction of He detonations in pre-AM CVn systems (Bildsten et al. 2007; Fink et al. 2007, 2010; Shen & Bildsten 2009; Shen et al. 2010; Sim et al. 2010; Woosley & Kasen 2011).”
DOUBLE-DETONATION SUB-CHANDRASEKHAR SUPERNOVAE: SYNTHETIC OBSERVABLES FOR MINIMUM HELIUM SHELL MASS MODELS (2010, methodology): “Finally, we note that the strong line-of-sight dependence of our synthetic observables poses an additional problem for the Fink et al. (2010) models.”
Observational Clues to the Progenitors of Type Ia Supernovae (2013, background): “This detonation drives a shock into the underlying C/O WD, which then ignites carbon at or near the center, even in sub-MCh WDs (Fink et al. 2010, Livne 1990, Shen & Bildsten 2009).”
Three-dimensional delayed-detonation models with nucleosynthesis for Type Ia supernovae (2012, methodology): “For detonations, the corresponding data is taken from the tables of Fink et al.(2010), and another table for deflagrations was determined in the samway as described there.”
HELIUM-IGNITED VIOLENT MERGERS AS A UNIFIED MODEL FOR NORMAL AND RAPIDLY DECLINING TYPE Ia SUPERNOVAE (2013, background): “From two- and three-dimensional simulations sub-Chandrasekharmass explosions (Fink et al. 2007, 2010; Moll & Woosley 2013), we know that such a converging shock inevitably leads to the formation of a subsequent C detonation.”
SUB-CHANDRASEKHAR MASS MODELS FOR SUPERNOVAE (2010, background): “Model 1 of Fink et al. (2010), on the other hand, is derived from a construction provided to them by Bildsten et al. (2007).”
Three Hypervelocity White Dwarfs in Gaia DR2: Evidence for Dynamically Driven Double-degenerate Double-detonation Type Ia Supernovae (2018, background): “…for helium single degenerates (Nomoto 1982b; Woosley et al. 1986) and for double degenerates that undergo either stable (Bildsten et al. 2007; Fink et al. 2007, 2010; Shen & Bildsten 2009) or unstable mass transfer (Guillochon et al. 2010; Dan et al. 2011; Raskin et al. 2012; Pakmor et al.…”
Observational Predictions for Sub-Chandrasekhar Mass Explosions: Further Evidence for Multiple Progenitor Systems for Type Ia Supernovae (2018, methodology): “Our models also show similar yields to the traditional 2-dimensional double detonation explosions modeled in Fink et al. (2010) and the 3-dimensional rotating WDs modeled in Garćıa-Senz et al. (2018) when examining the amount of 56Ni produced from the underlying WD.”
TYPE Iax SUPERNOVAE: A NEW CLASS OF STELLAR EXPLOSION (2012, background): “Although this mass may not be enough to account for all of the ejecta in SNe Iax, it should be massive enough to detonate, perhaps triggering a double-detonation on a subChandrasekhar mass SN (Fink et al. 2010).”
The helium star donor channel for the progenitors of Type Ia supernovae (2009, background): “We also note that recent studies on He accretion to CO WDs reveal that double-detonation of sub-Chandrasekhar mass WDs produces an SN Ia that is much brighter than normal SNe Ia (e.g., Fink et al. 2010).”
Three-dimensional pure deflagration models with nucleosynthesis and synthetic observables for type ia supernovae (2013, methodology): “Both violent WD–WD mergers (Pakmor et al. 2013; Ruiter et al. 2013) and sub-Chandrasekhar double detonations (Fink et al. 2010; Kromer et al. 2010; Woosley & Kasen 2011; Moll & Woosley 2013) may account for normal and subluminous types of SNe Ia.”
NORMAL TYPE Ia SUPERNOVAE FROM VIOLENT MERGERS OF WHITE DWARF BINARIES (2012, methodology): “With these initial conditions we use theLEAFS code (Reinecke et al. 1999a) that applies the level-set technique to model detonation flames (Reinecke et al. 1999b; Fink et al. 2010).”
Sub-Chandrasekhar-mass White Dwarf Detonations Revisited (2017, background): “In the converging shock variant of the double detonation, a helium shell detonation propagates around the WD’s surface and launches an oblique shock into the core that focuses its energy near the center and ignites the carbon detonation (Livne 1990; Fink et al. 2007, 2010; Shen & Bildsten 2014).”