Stellar adiabatic mass loss model and applications

Details Stellar adiabatic mass loss model and applications Stellar adiabatic mass loss model and applications

2010-05-18

arxiv.org/abs/1005.3105v1

Astronomy and Astrophysics

Astrophysics

Solar and Stellar Astrophysics

7 pages, 5 figures,Accepted for publication in AP&SS, Special issue Hot Sub-dwarf Stars, in Han Z., Jeffery S., Podsiadlowski

Scientific paper

10.1007/s10509-010-0286-1

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 Msun and 10 Msun, and identify potential limitations to the use of our results for giant-branch stars.

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