SIMBAD references

2001A&A...370..456T - Astronomy and Astrophysics, volume 370, 456-467 (2001/5-1)

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

TOVMASSIAN G.H., STASINSKA G., CHAVUSHYAN V.H., ZHARIKOV S.V., GUTIERREZ C. and PRADA F.

Abstract (from CDS):

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.

Abstract Copyright:

Journal keyword(s): ISM: planetary nebulae: general - ISM: planetary nebulae: individual: SBS 1150+599A (PN G135.9+55.9) - galaxies: halos - stars: binaries: symbiotic - stars: cataclysmic variables

Simbad objects: 1

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