Radiation-Pressure Ejection of Planetary Nebulae in Asymptotic-Giant- Branch Stars

Details Radiation-Pressure Ejection of Planetary Nebulae in Asymptotic-Giant- Branch Stars Radiation-Pressure Ejection of Planetary Nebulae in Asymptotic-Giant- Branch Stars

1999-09-28

arxiv.org/abs/astro-ph/9909470v1

Astronomy and Astrophysics

Astrophysics

2 pages, 1 figure, to appear in PASP Conference Proceedings series of IAU Symposium 190: "New Views of the Magellanic Clouds"

Scientific paper

We have investigated the possibility that radiation pressure might trigger planetary nebula (PN) ejection during helium-shell flashes in asymptotic- giant-branch (AGB) stars. We find that the outward flux at the base of the hydrogen envelope during a flash will reach the Eddington limit when the envelope mass falls below a critical value that depends on the core mass and composition. These results may help to explain the helium-burning PN nuclei found in the Magellanic Clouds.

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