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| Paper: |
The Link Between RS Ophiuchi and Type Ia Supernovae |
| Volume: |
469, 18th European White Dwarf Workshop (EUROWD12) |
| Page: |
323 |
| Authors: |
Mohamed, S.; Booth, R.; Podsiadlowski, Ph. |
| Abstract: |
RS Ophiuchi (RS Oph) is a symbiotic nova system consisting of a red giant
and an accreting white dwarf (WD) which undergoes thermonuclear outbursts
every 10–20 years. The WD is thought to be close to the Chandrasekhar mass
making the system a likely Type Ia supernova (SN Ia) candidate. In recent years,
the RS Oph–SN Ia connection has been further strengthened by time-varying
circumstellar (CSM) absorption lines observed in high-resolution spectra of both systems.
In this paper, we present 3D hydrodynamic simulations of the RS Oph system
and preliminary post-processing results for the CSM absorption and hydrogen
recombination lines. We find good agreement between the highly-structured,
bipolar geometry in our models and the observed morphology. The geometry
also naturally explains both the low velocity, narrow absorption and broad emission
lines seen in SN 2006X and PTF 11kx. However, we find longer recombination
timescales, larger velocity widths and weaker lines suggesting that the shells
may be thinner and denser than those in our simulations. |
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