The atypical emission-line star Hen3-209
Abstract
We analyse observations, spanning 15 yr, 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 0.65 mag. These variations are recurrent, with a period of 16.093 +/-0.005 d. 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 600 kms-1. Hen3-209 is most likely an evolved luminous object suffering from mass ejection events and maybe belonging to a binary system.
Based on observations collected at the European Southern Observatory (La Silla, Chile) and the Cerro-Tololo Observatory (Chile). Postdoctoral Researcher FNRS (Belgium). ‡ E-mail: naze@astro.ulg.ac.be § Research Associate FNRS (Belgium). ¶ Research Director FNRS (Belgium).- Publication:
-
Monthly Notices of the Royal Astronomical Society
- Pub Date:
- October 2006
- DOI:
- 10.1111/j.1365-2966.2006.10731.x
- arXiv:
- arXiv:astro-ph/0606627
- Bibcode:
- 2006MNRAS.371.1594N
- Keywords:
-
- stars: chemically peculiar: stars: emission-line;
- Be: stars: individual: Hen3-209;
- stars: chemically peculiar;
- stars: emission-line;
- Be;
- stars: individual: Hen3-209;
- Astrophysics
- E-Print:
- 6p, 5 fig, accepted for publication in MNRAS (www.blackwell-synergy.com)