Mass loss evolution and the formation of detached shells around TP-AGB stars
Lars MattssonDepartment of Astronomy and Space Physics, Uppsala University, Box 515, 751 20 Uppsala, Sweden e-mail: [email protected]S. HöfnerDepartment of Astronomy and Space Physics, Uppsala University, Box 515, 751 20 Uppsala, Sweden e-mail: [email protected]Falk HerwigKeele Astrophysics Group, School of Physical and Geographical Sciences, Keele University, Stafford shire ST5 5BG, UK e-mail: [email protected]
ABI
Abstract
Context. The origin of the so called “detached shells” around AGB stars is not fully understood, but two common hypotheses state that these shells form either through the interaction of distinct wind phases or an eruptive mass loss associated with a He-shell flash. We present a model of the formation of detached shells around thermal pulse asymptotic giant branch (TP-AGB) stars, based on detailed modelling of mass loss and stellar evolution, leading to a combination of eruptive mass loss and wind interaction.
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