3D deflagration simulations leaving bound remnants: a model for 2002cx-like Type Ia supernovae

By M. Kromer, M. Fink, V. Stanishev, Stefan Taubenberger, F. Ciaraldi-Schoolmann, Rüdiger Pakmor, Friedrich K. Röpke, A. Ruiter, I. Seitenzahl, Stuart A. Sim and 3 more. 2012

158 citations recorded by the source corpus.

cx-like supernovae are a sub-class of sub-luminous Type Ia supernovae. Their light curves and spectra are characterized by distinct features that indicate strong mixing of the explosion ejecta. Pure turbulent deagrations have been shown to produce such mixed ejecta. Here, we present hydrodynamics, nucleosynthesis and radiative transfer calculations for a 3D full-star deagration of a Chandrasekhar-mass white dwarf. Our model is able to reproduce the characteristic observational features of SN 2005hk (a proto-typical 2002cx-like supernova), not only in the optical, but also in the near- infrared. For that purpose we present, for the rst time, ve near-infrared spectra of SN 2005hk from 0:2 to 26:6 days with respect to B-band maximum. Since our model burns only small parts of the initial white dwarf, it fails to completely unbind the white dwarf and leaves behind a bound remnant of 1.03 M { consisting mainly of unburned carbon and oxygen, but also enriched by some amount of intermediate-mass and iron-group elements from the explosion products that fall back on the remnant. We discuss possibilities for detecting this bound remnant and how it might inuence the late-time observables of 2002cx-like SNe.

Subfields: Astronomy and Astrophysics

View Paper: https://www.semanticscholar.org/paper/f89e540f348f75545a2ac8ad856b2f4f33f7aa5f

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In Astronomy and Astrophysics

Citations in the corpus

HELIUM-IGNITED VIOLENT MERGERS AS A UNIFIED MODEL FOR NORMAL AND RAPIDLY DECLINING TYPE Ia SUPERNOVAE (2013, background): “But they have recently been identified with off-center-ignited pure deflagrations of Chandrasekhar-mass CO WDs (Kromer et al. 2013).”
Three Hypervelocity White Dwarfs in Gaia DR2: Evidence for Dynamically Driven Double-degenerate Double-detonation Type Ia Supernovae (2018, background): “In the late-time nebular phase, when the SN ejecta becomes optically thin, oxygen in the disrupted WD material may become visible as strong, narrow emission features, but these are almost never detected (although see Kromer et al. 2013 and Taubenberger et al. 2013 for the case of SN 2010lp).”
Three-dimensional pure deflagration models with nucleosynthesis and synthetic observables for type ia supernovae (2013, background): “As discussed by Kromer et al. (2013), in particular model N5def nicely reproduces the overall flux level and spectral features of SN 2005hk, a prototypical 2002cx-like event.”
On the Progenitors of Type Ia Supernovae (2018, unknown): “A weak deflagration may not be able to obliterate the exploding WD, but rather it would leave behind a compact remnant (e.g., Kromer et al. 2013).”