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Binary interaction along the Red Giant Branch: The Barium Star perspective (1809.05434v1)

Published 14 Sep 2018 in astro-ph.SR

Abstract: Barium (Ba) stars form via mass-transfer in binary systems, and can subsequently interact with their white dwarf companion in a second stage of binary interaction. We used observations of main-sequence Ba systems as input for our evolutionary models, and try to reproduce the orbits of the Ba giants. We show that to explain short and sometimes eccentric orbits, additional interaction mechanisms are needed along the RGB.

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