Constraining the double-degenerate scenario for Type Ia supernovae from merger ejected matter

Abstract

We follow the mass expelled during the WD-WD merger process in a particular case of the Double-Degenerate (DD) scenario for Type Ia supernovae (SNe Ia), and find that the interaction of the SN ejecta with the resulting wind affects the early (first day) light curve in a way that may be in conflict with some SN Ia observations, if the detonation occurs shortly after the merger (i.e., $10^3\sec \lesssim t_{\exp }\lesssim 1\mathrm{day}$). The main source of the expelled mass is a disk-wind, or jets that are launched by the accretion disk around the more massive WD during the viscous phase of the merger. This disk-originated matter (DOM) will be shocked and heated by the SN ejecta from an explosion, leading to additional radiation in the early lightcurve. This enhanced early radiation could then be interpreted as an explosion originating from a progenitor having an inferred radius of one solar radius or more, in conflict with observations of SN 2011fe.

7 pages. Accepted to MNRAS

References in corpus (10)

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Cited by in corpus (12)

• A hybrid type Ia supernova with an early flash triggered by helium-shell detonation
• No trace of a single-degenerate companion in late spectra of SNe 2011fe and 2014J
• ZTF 18aaqeasu (SN 2018byg): A Massive Helium-shell Double Detonation on a Sub-Chandrasekhar Mass White Dwarf
• The fraction of type Ia supernovae exploding inside planetary nebulae (SNIPs)
• The response of a helium white dwarf to an exploding type Ia supernova
• Smoothed Particle Hydrodynamics simulations of the core-degenerate scenario for Type Ia supernovae
• The circumstellar matter of supernova 2014J and the core-degenerate scenario
• Explaining the early excess emission of the Type Ia supernova 2018oh by the interaction of the ejecta with disk-originated matter (DOM)
• Exploring the diversity of double detonation explosions for type Ia supernovae: Effects of the post-explosion helium shell composition
• Identification of the feature that causes the I-band secondary maximum of a type Ia supernova
• Time series of high resolution spectra of SN 2014J observed with the TIGRE telescope
• High-velocity feature as the indicator of the stellar population of Type Ia supernovae