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2 results

  • The Binary Central Star of Hf 38

  • Helen Barker
  • Journal:
    Proceedings of the International Astronomical Union / Volume 12 / Issue S323 / October 2016
    Published online by Cambridge University Press:
    08 August 2017, pp. 382-383
    Print publication:
    October 2016
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  • Despite years of effort, the impact of central star binarity on planetary nebula formation and shaping remains unclear. This is hampered by the fact that detecting central star binarity is inherently difficult, and requires very precise observations. The fraction of planetary nebulae with binary central stars therefore remains elusive. This work presents initial results of central star analysis using data from the VST Hα Survey of the Southern Galactic Plane and Bulge (VPHAS+). The true central star of PN Hf 38 has been revealed, and it exhibits a 0.465±0.334 i band magnitude excess, indicative of a M0V companion.

  • Post-AGB Candidates

  • L.B.F.M. Waters, K.C. Sahu
  • Journal:
    Symposium - International Astronomical Union / Volume 155 / 1993
    Published online by Cambridge University Press:
    07 August 2017, pp. 271-278
    Print publication:
    1993
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  • A review is given of the properties of post-AGB stars. Methods to find candidate post-AGB stars are briefly discussed, along with some results and selection effects involved. Their photospheric parameters (Teff , log g, abundances), energy distributions and binarity are also discussed. Evidence for mass loss, both past and present, is reviewed.