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The atypical emission-line star Hen3-209

Y. Naze·G. Rauw·D. Hutsemekers·E. Gosset·J. Manfroid·P. Royer
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Abstract

We analyse observations, spanning 15 years, dedicated to the extreme emission-line object Hen3-209. Our photometric data indicate that the luminosity of the star undergoes marked variations with a peak-to-peak amplitude of 0.65mag. These variations are recurrent, with a period of 16.093+-0.005d. The spectrum of Hen3-209 is peculiar with many different lines (HI, HeI, FeII,...) showing P Cygni profiles. The line profiles are apparently changing in harmony with the photometry. The spectrum also contains [OIII] lines that display a saddle profile topped by three peaks, with a maximum separation of about 600km/s. Hen3-209 is most likely an evolved luminous object suffering from mass ejection events and maybe belonging to a binary system.

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Y. Naze, G. Rauw, D. Hutsemekers, E. Gosset, J. Manfroid, P. Royer. 2006-06-26. The atypical emission-line star Hen3-209. https://doi.org/10.1111/j.1365-2966.2006.10731.x

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