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Paper: Instability Considerations for Massive Star Eruptions
Volume: 332, The Fate of the Most Massive Stars
Page: 204
Authors: Guzik, J.
Abstract: We propose a mechanism to explain the observed properties of the giant eruptions of 'supernova imposters' such as η Car and P Cyg. This mechanism must be episodic, generate a large amount of energy, and be deep seated, in order to lift about 10 solar masses out of the deep gravitational potential well of these massive evolved stars. We suggest that nonradial gravity mode oscillations capable of existing in the core near the hydrogen-burning shell grow slowly to an amplitude sufficient to cause an episode of mixing of hydrogen-rich material downward into hotter denser layers. This mixing generates a burst of nuclear energy production that is responsible for the observed mass ejection and bolometric magnitude increase.
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