The Role of Ionization Energy during Planetary Nebula Ejection

Details The Role of Ionization Energy during Planetary Nebula Ejection The Role of Ionization Energy during Planetary Nebula Ejection

May 1998

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998apj...498..293h&link_type=abstract

Astrophysical Journal v.498, p.293

Astronomy and Astrophysics

Astronomy

12

Stars: Evolution, Stars: Mass Loss, Ism: Planetary Nebulae: General, Stars: Agb And Post-Agb

Scientific paper

The conditions for release of the ionization energy in the envelope of an asymptotic giant branch star are studied. It is shown that the recombination that releases the ionization energy also causes a sharp drop of the opacity, thus enabling the released energy to flow outward freely. The possibility that the ionization energy, when released, drives the ejection of planetary nebula (PN) is discussed. Tests suggested to validate the hypothesis that the ionization energy drives PN ejection are examined, and it is found that these tests are not sensitive to details of the hypothesis they are supposed to validate.

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