2008/07/01 by Masaaki Otsuka, Hideyuki Izumiura, Akito Tajitsu +1
Physics and Astronomy · #Astronomy and Astrophysical Research #Scientific Research and Discoveries #Stellar, planetary, and galactic studies #astro-ph
paper · pdf · doi:10.1086/591147
13 pages, 3 figures, accepted by ApJ Letters
arxiv created 2008/07/01 · openalex publication_date 2008/07/08 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/31
We have found the fluorine lines [F IV] λλ3996.92, 4059.90 in the extremely metal-poor ([Ar/H] = –2.10 ± 0.21) halo planetary nebula (PN) BoBn 1 in high-dispersion spectra from the 8.2 m VLT UVES archive. Chemical abundance analysis shows that the fluorine abundance is [F/H] = +1.06 ± 0.08, making BoBn 1 the most fluorine-enhanced and metal-poor PN among fluorine-detected PNe and providing new evidence that fluorine is enhanced by nucleosynthesis in low-mass metal-poor stars. A comparison with the abundances of carbon-enhanced metal-poor (CEMP) stars suggests that BoBn 1 shares their origin and evolution with CEMP- s stars such as HE 1305+0132. BoBn 1 might have evolved from a binary consisting of ~2 M ☉ primary and ~0.8 M ☉ secondary stars.