PTF11kx: A Type-Ia Supernova with a Symbiotic Nova Progenitor
B. Dilday, D. A. Howell, S. B. Cenko, J. M. Silverman, P. E. Nugent,, M. Sullivan, S. Ben-Ami, L. Bildsten, M. Bolte, M. Endl, A. V. Filippenko, O., Gnat, A. Horesh, E. Hsiao, M. M. Kasliwal, D. Kirkman, K. Maguire, G. W., Marcy, K. Moore, Y. Pan, J. T. Parrent, P. Podsiadlowski
TL;DR
This paper presents detailed spectral observations of the supernova PTF 11kx, revealing a complex circumstellar environment indicative of a symbiotic nova progenitor, thus providing new insights into the nature of Type-Ia supernova progenitors.
Contribution
It offers the first detailed spectral evidence supporting a symbiotic nova progenitor for a Type-Ia supernova, enhancing understanding of their origins.
Findings
Detection of multiple circumstellar shells.
Interaction of supernova ejecta with circumstellar material.
Evidence supporting a symbiotic nova progenitor.
Abstract
There is a consensus that Type-Ia supernovae (SNe Ia) arise from the thermonuclear explosion of white dwarf stars that accrete matter from a binary companion. However, direct observation of SN Ia progenitors is lacking, and the precise nature of the binary companion remains uncertain. A temporal series of high-resolution optical spectra of the SN Ia PTF 11kx reveals a complex circumstellar environment that provides an unprecedentedly detailed view of the progenitor system. Multiple shells of circumsteller are detected and the SN ejecta are seen to interact with circumstellar material (CSM) starting 59 days after the explosion. These features are best described by a symbiotic nova progenitor, similar to RS Ophiuchi.
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