Detection of a multishell planetary nebula around the hot subdwarf O-type star 2MASS J19310888+4324577
Context. The origin of hot subdwarf O-type stars (sdOs) remains unclear since their discovery in 1947. Among others, a post-asymptotic giant branch (post-AGB) origin is possible for a fraction of sdOs.
Aims: We are involved in a comprehensive ongoing study to search for and to analyze planetary nebulae (PNe) around sdOs with the aim of establishing the fraction and properties of sdOs with a post-AGB origin.
Methods: We used deep Hα and [O iii] images of sdOs to detect nebular emission and intermediate-resolution, long-slit optical spectroscopy of the detected nebulae and their sdO central stars. These data were complemented with other observations (archive images, high-resolution, long-slit spectroscopy) for further analysis of the detected nebulae.
Results: We report detecting an extremely faint, complex PN around
Astronomy and Astrophysics
- Pub Date:
- April 2013
- planetary nebulae: individual: PNG075.9+11.6;
- stars: individual: 2MASS J19310888+4324577;
- binaries: close;
- Astrophysics - Solar and Stellar Astrophysics
- 8 pages, 7 figures, accepted in Astronomy and Astrophysics