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2012MNRAS.419.2867B - Mon. Not. R. Astron. Soc., 419, 2867-2879 (2012/February-1)
Thermally pulsing asymptotic giant branch star models and globular cluster planetary nebulae - I. The model.
BUELL J.F.
Abstract (from CDS):
The global properties of the globular cluster planetary nebula are reproduced with these models. The metallicity, mass of the central star, overall metallicities, helium abundance and the nebular mass are matched to the observational values. Globular cluster planetary nebulae JaFu 1 and JaFu 2 are reproduced by assuming progenitor stars with masses near the typical main-sequence turn-offs of globular clusters and with enhanced helium abundances very similar to the enhancements inferred from fitting isochrones to globular cluster colour-magnitude diagrams. The globular cluster PN GJJC-1 can be roughly fitted by a progenitor star with very extreme helium enhancement (Y ≈ 0.40) near the turn-off producing a central star with the same mass as inferred by observations and a very low nebular mass. The abundances and core mass of planetary nebula Ps 1 and its central star (K648) are reproduced by a blue straggler model. However, it turned out to be impossible to reproduce its nebular mass, and it is concluded some kind of binary scenario may be needed to explain K648.
Abstract Copyright: 2011 The Author Monthly Notices of the Royal Astronomical Society2011 RAS
Journal keyword(s): stars: AGB and post-AGB - blue stragglers - stars: mass-loss - white dwarfs - globular clusters: general
Simbad objects: 18
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