Detection of a multishell planetary nebula around the hot subdwarf O-type star 2MASS J19310888+4324577

  title={Detection of a multishell planetary nebula around the hot subdwarf O-type star 2MASS J19310888+4324577},
  author={Alba Aller and Luis F. Miranda and Ana Ulla and R. V'azquez and P. F. Guill'en and L. Olgu'in and Cristina Rodr'iguez-L'opez and Peter Thejll and Raquel Oreiro and Minia Manteiga and Enrique A. S'anchez P'erez},
  journal={Astronomy and Astrophysics},
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 use deep Hand (Oiii) images of sdOs to detect nebular emission and… 

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