Impact of Type Ia Supernova Ejecta on Binary Companions within the Single-Degenerate Scenario and Subsequent Evolution of Post-Impact Remnant Stars
Abstract
Type Ia supernovae are thought to be caused by thermonuclear explosions of carbon-oxygen white dwarfs in close binary systems. However, the nature of the progenitor system is still uncertain. In the single-degenerate scenario (SDS), the companion star is non-degenerate and can be significantly affected by the explosion. We explore this interaction by means of multi-dimensional adaptive mesh refinement simulations using the FLASH code. We consider several different companion types, including main-sequence-like stars, red giants, and helium stars. In addition, we include the symmetry-breaking effects of orbital motion, rotation of the non-degenerate star, and Roche-lobe overflow. One way to distinguish between the single- and double-degenerate scenarios is to search for the post-impact remnant star expected in the SDS. We explore the evolution of the post-impact remnants in our simulations for main sequence-like and helium star binary companions using the stellar evolution code MESA. We find that the time evolution of the remnant star depends not only on the amount of energy absorbed but also on the depth of the energy deposition. Using our results, we examine the viability of the star Tycho G as the possible remnant companion in Tycho's supernova.
- Publication:
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American Astronomical Society Meeting Abstracts #221
- Pub Date:
- January 2013
- Bibcode:
- 2013AAS...22123304P