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- W4200375262 endingPage "277" @default.
- W4200375262 startingPage "277" @default.
- W4200375262 abstract "Abstract Most massive stars are born in binaries close enough for mass transfer episodes. These modify the appearance, structure, and future evolution of both stars. We compute the evolution of a 100-day-period binary, consisting initially of a 25 M ⊙ star and a 17 M ⊙ star, which experiences stable mass transfer. We focus on the impact of mass accretion on the surface composition, internal rotation, and structure of the accretor. To anchor our models, we show that our accretor broadly reproduces the properties of ζ Ophiuchi, which has long been proposed to have accreted mass before being ejected as a runaway star when the companion exploded. We compare our accretor to models of single rotating stars and find that the later and stronger spin-up provided by mass accretion produces significant differences. Specifically, the core of the accretor retains higher spin at the end of the main sequence, and a convective layer develops that changes its density profile. Moreover, the surface of the accretor star is polluted by CNO-processed material donated by the companion. Our models show effects of mass accretion in binaries that are not captured in single rotating stellar models. This possibly impacts the further evolution (either in a binary or as single stars), the final collapse, and the resulting spin of the compact object." @default.
- W4200375262 created "2021-12-31" @default.
- W4200375262 creator A5007008106 @default.
- W4200375262 creator A5016168543 @default.
- W4200375262 date "2021-12-01" @default.
- W4200375262 modified "2023-10-05" @default.
- W4200375262 title "Evolution of Accretor Stars in Massive Binaries: Broader Implications from Modeling ζ Ophiuchi" @default.
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