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arXiv · 0705.2115

Abell 43: Longest period Planetary Nebula Nucleus variable

J. -E. Solheim·G. Vauclair·A. S. Mukadam·R. Janulis·V. Dobrovolskas
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Abstract

Based on 24h high speed photometry of the hybrid PG 1159 star Abell 43, we have detected 6 sighificant pulsations with periods between 2380 s and 6075 s. A short (4h) run on the almost spectroscopic twin NGC 7094 central star resulted in detection of 3 low amplitude pulsations with periods between 2000 s and 5000 s. The results are close to predictions for g-mode pulsations driven by the kappa-mechanism induced by the partial ionization of carbon and oxygen.

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J. -E. Solheim, G. Vauclair, A. S. Mukadam, R. Janulis, V. Dobrovolskas. 2007-05-15. Abell 43: Longest period Planetary Nebula Nucleus variable. https://doi.org/10.1051/0004-6361:20077364

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