2015MNRAS.448.2822A

NGC 1514 is a complex planetary nebula with a peculiar binary central star (BD+30°623) consisting of a cool star and a hot companion. To date, the parameters of the two stars have not been firmly established. We present a detailed spectral analysis of BD+30°623 based on intermediate-resolution Calar Alto Faint Object Spectrograph optical spectra and International Ultraviolet Explorer spectra with the goal of deriving the parameters of the two stars. For this purpose, we used an extensive composite grid of Kurucz and Tübingen NLTE Model Atmosphere spectra. From the fitting procedure, in terms of the minimum χ2 method, the best models obtained correspond to an Horizontal-Branch A0 star with Teff = 9850±150K, logg = 3.50±0.25, and a hot companion with Teff between 80 000 and 95 000K and a logg ≃ 5.5. To our knowledge, this is the first time that the parameters of both stars have been determined accurately through a detailed spectroscopic analysis.