2006/06/26 by Y. Naze, Yaël Nazé, G. Rauw +6
Physics and Astronomy · #Amplitude #Astronomy #Astrophysical Phenomena and Observations #Astrophysics #Astrophysics and Star Formation Studies #Binary number #Emission spectrum #Galaxy #Line (geometry) #Luminosity #Optics #Photometry (optics) #Physics #Spectral line #Stars #Stellar, planetary, and galactic studies #astro-ph
paper · pdf · doi:10.1111/j.1365-2966.2006.10731.x
published as Mon.Not.Roy.Astron.Soc.371:1594-1600,2006 · 6p, 5 fig, accepted for publication in MNRAS (www.blackwell-synergy.com)
arxiv created 2006/06/26 · openalex publication_date 2006/09/13 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
We analyse observations, spanning 15 yr, dedicated to the extreme emission-line object Hen 3-209. Our photometric data indicate that the luminosity of the star undergoes marked variations with a peak-to-peak amplitude of 0.65 mag. These variations are recurrent, with a period of 16.093 ± 0.005 d. The spectrum of Hen 3-209 is peculiar with many different lines (H i, He i, Fe ii, …) showing P Cygni profiles. The line profiles are apparently changing in harmony with the photometry. The spectrum also contains [O iii] lines that display a saddle profile topped by three peaks, with a maximum separation of about 600 km s−1. Hen 3-209 is most likely an evolved luminous object suffering from mass ejection events and maybe belonging to a binary system.