English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

Binary evolution is indispensable in stellar evolution to understand theformation and evolution of most peculiar and energetic objects, such as binarycompact objects, Type Ia supernovae, X-ray binaries, cataclysmic variables,blue stragglers, hot subdwarfs, and central binaries in planetary nebulae. Masstransfer in binary stars can change the evolutionary path and fate of thecorresponding objects relative to what is expected from single stellarevolution. What is the critical mass ratio at which unstable mass transferoccurs is an unsolved fundamental problem in binary evolution. To resolve thisissue, we construct the thermal equilibrium mass loss model and derive criticalmass ratios for both thermal timescale mass transfer and unstable masstransfer, the latter of which occurs when the outer Lagrangian point, L2, isoverfilled. Using several 3.2 Msun stellar models as examples, we study thestellar response to thermal equilibrium mass loss and present the thresholdsfor thermal timescale mass transfer. We study the possible mass transferchannels of binary systems containing a 3.2 Msun donor star, taking intoaccount thermal timescale mass transfer, unstable mass transfer through L2, anddynamical timescale mass transfer. We repeat this simulation for a grid ofdonor stars with different masses (from 0.1 to 100 Msun with Z = 0.02) and atdifferent evolutionary stages, and present our results. The results show thatunstable mass transfer due to the overfilling of the outer Lagrangian point mayalso play an essential role in the formation of common envelopes for late redgiant branch and asymptotic giant branch donors.

The thermal equilibrium mass loss model and its applications in binary evolution