Astronomy and Astrophysics – Astronomy
Scientific paper
Sep 2005
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005aspc..332..204g&link_type=abstract
The Fate of the Most Massive Stars, ASP Conference Series, Vol. 332, Proceedings of the conference held 23-28 May, 2004 in Grand
Astronomy and Astrophysics
Astronomy
5
Scientific paper
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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