Abell 43: Longest period Planetary Nebula Nucleus variable - AstrophysicsReport as inadecuate




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



Author: J.-E. Solheim, G. Vauclair, A. S. Mukadam, R. Janulis, V. Dobrovolskas

Source: https://arxiv.org/







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