Spectral analysis of BD+30${}^{\circ }$623, the peculiar binary central star of the planetary nebula NGC 1514

Abstract

NGC 1514 is a complex planetary nebula with a peculiar binary central star (BD+30${}^{\circ }$623) consisting of a cool star and a hot companion. To date, the parameters of the two stars have not been firmly stablished. We present a detailed spectral analysis of BD+30${}^{\circ }$623 based on intermediate-resolution CAFOS optical spectra and IUE ultraviolet 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 ${\chi }^2$ method, the best models obtained correspond to an Horizontal-Branch A0 star with $T_{\mathrm{eff}}$ = 9850$\pm$150 K, log g = 3.50$\pm$0.25, and a hot companion with $T_{\mathrm{eff}}$ between 80000 K and 95000K and a log g $\simeq$ 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.

10 pages, 8 figures. Accepted for publication in MNRAS

References in corpus (2)

• Hot DB White Dwarfs from the Sloan Digital Sky Survey
• The Discovery of Infrared Rings in the Planetary Nebula NGC 1514 During the WISE All-Sky Survey

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• The morpho-kinematical structure and chemical abundances of the complex planetary nebula NGC 1514
• The two central stars of NGC 1514: can they actually be related?
• Observations of the planetary nebula RWT 152 with OSIRIS/GTC