AGB Mass-Loss Characteristics: Rates, Temporal Variations, and Geometries

Details AGB Mass-Loss Characteristics: Rates, Temporal Variations, and Geometries AGB Mass-Loss Characteristics: Rates, Temporal Variations, and Geometries

Sep 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011aspc..445..253s&link_type=abstract

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

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The successful modelling (at various degrees of sophistication) of circumstellar emission from the vast majority of AGB stars, assuming a spherically symmetric envelope, suggests that pronounced axi- or non-symmetric mass loss is not a common phenomenon among AGB stars. Significant deviations from spherical symmetry have been detected which, in at least some cases, might be an effect of a binary system. Temporal modulations of the mass-loss rate are also present, at least during the later carbon star evolutionary phase, where (more or less periodic) variations are observed on various time-scales. We present a summary of the various morphological structures observed around AGB stars and their interpretation based on radiative transfer modelling.

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