SBS 1150+599A: an extremely oxygen-poor planetary nebula in the Galactic halo?

Abstract

We report results of a spectrophotometric study of SBS 1150+599A and discuss the nature of this object based upon our data. Our study shows that SBS 1150+599A is most probably a planetary nebula located in the Galactic halo and not a cataclysmic variable as originally proposed by the authors of the Second Byurakan Survey from low resolution spectroscopy. We have further elaborated on the properties of SBS 1150+599A (now becoming PN G135.9+55.9) with tools used for planetary nebula analysis. Our photoionization models show that, in order to match the observational constraints, the oxygen abundance in the nebula is probably extremely low, around 1/500 solar, which is one order of magnitude lower than the most oxygen-poor planetary nebulae known so far. This finding has strong implications on our understanding of the formation of planetary nebulae and of the evolution of the Galactic halo.

arXiv comment13 pages, 5 figures, accepted for publication in Astronomy and Astrophysics

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Cited by in corpus (11)

• Binary planetary nebulae nuclei towards the Galactic bulge. II. A penchant for bipolarity and low-ionisation structures
• The Double-Degenerate Nucleus of the Planetary Nebula TS 01. A Close Binary Evolution Showcase
• A close binary nucleus in the most oxygen-poor planetary nebula PN G 135.9+55.9
• The chemical composition of TS 01, the most oxygen-deficient planetary nebula. AGB nucleosynthesis in a metal-poor binary star
• Confirmation of SBS 1150+599A As An Extremely Metal-Poor Planetary Nebula
• Observations of [S IV] 10.5 micron and [Ne II] 12.8 micron in Two Halo Planetary Nebulae: Implications for Chemical Self-Enrichment
• J-PLUS: Tools to identify compact planetary nebulae in the Javalambre and southern photometric local universe surveys
• The alpha-element abundances in the most oxygen-poor planetary nebula PN G 135.9+55.9
• The kinematics of the most oxygen-poor planetary nebula PN G135.9+55.9
• The evolution of planetary nebulae VI. On the chemical composition of the metal-poor PN G135.9+55.9
• Planetary nebulae, tracers of stellar nucleosynthesis