Stellar adiabatic mass loss model and applications |
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Authors: | Hongwei Ge Ronald F. Webbink Zhanwen Han Xuefei Chen |
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Affiliation: | 1. National Astronomical Observatories/Yunnan Observatory, Chinese Academy of Sciences, Kunming, 650011, P.R. China 2. Key Laboratory for the Structure and Evolution of Celestial Objects, Chinese Academy of Sciences, Kunming, 650011, P.R. China 3. Graduate University of Chinese Academy of Sciences, Beijing, 100049, P.R. China 4. Department of Astronomy, University of Illinois, 1002 W. Green St., Urbana, IL, 61801, USA
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Abstract: | Roche-lobe overflow and common envelope evolution are very important in binary evolution, which is believed to be the main evolutionary channel to hot subdwarf stars. The details of these processes are difficult to model, but adiabatic expansion provides an excellent approximation to the structure of a donor star undergoing dynamical time scale mass transfer. We can use this model to study the responses of stars of various masses and evolutionary stages as potential donor stars, with the urgent goal of obtaining more accurate stability criteria for dynamical mass transfer in binary population synthesis studies. As examples, we describe here several models with the initial masses equal to 1 M ⊙ and 10 M ⊙, and identify potential limitations to the use of our results for giant-branch stars. |
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