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Título: | V1369 Cen High-resolution Panchromatic Late Nebular Spectra in the Context of a Unified Picture for Nova Ejecta |
Autor: | Mason, Elena; Shore, Steven N.; De Gennaro Aquino, Ivan; Izzo, Luca; Page, Kim; Schwarz, Greg J. | Palabras clave: | Stars: novae, cataclysmic variables Stars: individual (V339 Del, V1369 Cen, V959 Mon) Line: formation Line: identification Line: profiles Methods: observational Techniques: spectroscopic |
Fecha de publicación: | 2018 | Editor: | IOP Publishing | Citación: | Astrophysical Journal 853: 27 (2018) | Resumen: | Nova Cen 2013 (V1369 Cen) is the fourth bright nova observed panchromatically through high-resolution UV+optical multiepoch spectroscopy. It is also the nova with the richest set of spectra (in terms of both data quality and number of epochs) thanks to its exceptional brightness. Here, we use the late nebular spectra taken between day ∼250 and day ∼837 after outburst to derive the physical, geometrical, and kinematical properties of the nova. We compare the results with those determined for the other panchromatic studies in this series: T Pyx, V339 Del (nova Del 2013), and V959 Mon (nova Mon 2012). From this we conclude that in all these novae the ejecta geometry and phenomenology can be consistently explained by clumpy gas expelled during a single, brief ejection episode and in ballistic expansion, and not by a wind. For V1369 Cen the ejecta mass (∼1 ×10 Mo) and filling factor (0.1 ≤ f ≤ 0.2) are consistent with those of classical novae but larger (by at least an order of magnitude) than those of T Pyx and the recurrent novae. V1369 Cen has an anomalously high (relative to solar) N/C ratio that is beyond the range currently predicted for a CO nova, and the Ne emission line strengths are dissimilar to those of typical ONe or CO white dwarfs.© 2018. The American Astronomical Society. All rights reserved. | Versión del editor: | http://dx.doi.org/10.3847/1538-4357/aaa247 | URI: | http://hdl.handle.net/10261/215517 | DOI: | 10.3847/1538-4357/aaa247 | Identificadores: | doi: 10.3847/1538-4357/aaa247 e-issn: 1538-4357 issn: 0004-637X |
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