Pulsations of intermediate-mass metal-rich AGB long period variables.

Details Pulsations of intermediate-mass metal-rich AGB long period variables. Pulsations of intermediate-mass metal-rich AGB long period variables.

Jan 1995

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995acaps..15...47g&link_type=abstract

Acta Astrophys. Sin., Vol. 15, No. 1, p. 47 - 56

Astronomy and Astrophysics

Astrophysics

2

Long-Period Variables: Agb Stars, Long-Period Variables: Stellar Oscillations, Long-Period Variables: Stellar Evolution, Long-Period Variables: Mass Loss

Scientific paper

A study of the pulsations of the intermediate-mass metal-rich stars on the asymptotic giant branch were carried out by computing both their evolution and oscillations. Based on the numerical results of the first three linear nonadiabatic radial pulsation modes, the first overtone was the most possible pulsation mode for AGB long period variables (LPVs). The pulsations were excited at H+ and He++ ionization zone by the interaction of gas and radiation field. Very long period AGB LPVs can only be evolved by the intermediate mass stars. A great mass loss rate, which may relate to pulsation, is needed at the top AGB phase.

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