CK Vul: a smorgasbord of hydrocarbons rules out a 1670 nova (and much else besides)

Evans, A, Gehrz, RD, Woodward, CE, Sarre, PJ, van Loon, JT, Helton, LA, Starrfield, S and Eyres, SPS (2016) CK Vul: a smorgasbord of hydrocarbons rules out a 1670 nova (and much else besides). Monthly Notices of the Royal Astronomical Society, 457 (3). pp. 2871-2876. ISSN 0035-8711

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Official URL: http://dx.doi.org/10.1093/mnras/stw352

Abstract

We present observations of CK Vul obtained with the Spitzer Space Telescope. The infrared spectrum reveals a warm dust continuum with nebular, molecular hydrogen and HCN lines superimposed, together with the `Unidentified Infrared' features. The nebular lines are consistent with emission by a low-density gas. We conclude that the Spitzer data, combined with other information, are incompatible with CK Vul being a classical nova remnant in `hibernation' after the event of 1670, a `very late thermal pulse', a `Luminous Red Variable', such as V838 Mon, or a `diffusion-induced nova'. The true nature of CK Vul remains a mystery.


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