Pulsation and Mass Loss of AGB Stars in the Magellanic Cloud Clusters NGC 1978 and NGC 419

Details Pulsation and Mass Loss of AGB Stars in the Magellanic Cloud Clusters NGC 1978 and NGC 419 Pulsation and Mass Loss of AGB Stars in the Magellanic Cloud Clusters NGC 1978 and NGC 419

Sep 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011aspc..445..127k&link_type=abstract

Why Galaxies Care about AGB Stars II: Shining Examples and Common Inhabitants. Proceedings of a conference held at University Ca

Astronomy and Astrophysics

Astronomy

Scientific paper

We present results of a study of asymptotic giant branch (AGB) stars in the Magellanic Cloud clusters NGC 1978 and NGC 419. The aim of this work is to use pulsation analysis as a means to study mass-loss on the AGB. We derive pulsation masses for the AGB variables, from the lowest luminosity O-rich variables to the most evolved infrared sources. Our studies show that reliable pulsation masses can be determined for AGB stars. We also use non-linear pulsation models to fit the highly evolved AGB stars. Our models show that a substantial amount of mass loss has occurred during the AGB evolution of these stars. We compare our results to commonly-used mass-loss formulae such as those of Vassiliadis & Wood (1993) and Blöcker (1995).

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