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20 April 2024

» arxiv » 1803.5425

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Discovery of a new classical nova shell around a nova-like cataclysmic variable
Martin A. Guerrero ; Laurence Sabin ; Gagik Tovmassian ; Edgar Santamaria ; Raul Michel ; Gerardo Ramos-Larios ; Alexandre Alarie ; Christophe Morisset ; Luis C. Bermudez Bustamante ; Chantal P. Gonzalez ; Nick J. Wright ;
Date:	14 Mar 2018
Abstract:	The morphology and optical spectrum of IPHASXJ210205+471015, a nebula classified as a possible planetary nebula, are however strikingly similar to those of ATCnc, a classical nova shell around a dwarf nova. To investigate its true nature, we have obtained high-resolution narrow-band [O III] and [N II] images and deep GTC OSIRIS optical spectra. The nebula shows an arc of [N II]-bright knots notably enriched in nitrogen, whilst an [O III]-bright bow-shock is progressing throughout the ISM. Diagnostic line ratios indicate that shocks are associated with the arc and bow-shock. The central star of this nebula has been identified by its photometric variability. Time-resolved photometric and spectroscopic data of this source reveal a period of 4.26 hours, which is attributed to a binary system. The optical spectrum is notably similar to that of RWSex, a cataclysmic variable star (CV) of the UXUMa nova-like (NL) type. Based on these results, we propose that IPHASX J210205+471015 is a classical nova shell observed around a CV-NL system in quiescence.
Source:	arXiv, 1803.5425
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