On an Early - Post-AGB Instability
Abstract
Dynamical stellar-evolution modeling through the AGB phase reveals that radial pulsations with very fast-growing amplitudes develop if the luminosity to mass ratio of stars with tenuous envelopes exceeds a critical limit. An instability going nonlinear already after a few pulsation cycles might qualify as a source of the superwind - postulated to shed a substantial part of a star's envelope over a very short time - of hitherto persistently mysterious nature.
- Publication:
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arXiv e-prints
- Pub Date:
- March 2023
- DOI:
- 10.48550/arXiv.2303.11374
- arXiv:
- arXiv:2303.11374
- Bibcode:
- 2023arXiv230311374G
- Keywords:
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- Astrophysics - Solar and Stellar Astrophysics
- E-Print:
- 15 pages, 12 figures