000006554 001__ 6554
000006554 005__ 20240110141140.0
000006554 0247_ $$2DOI$$a10.1051/0004-6361/202245378
000006554 037__ $$aSCART-2024-0011
000006554 100__ $$aSen, K
000006554 245__ $$aReverse Algols and hydrogen-rich Wolf-Rayet stars from very massive binaries
000006554 260__ $$c2023
000006554 520__ $$aMassive star feedback affects the evolution of galaxies, where the most massive stars may have the largest impact. The majority of massive stars are born as members of close binary systems. In this work, we investigated detailed evolutionary models of very massive binaries (30−90 M⊙) with Large Magellanic Cloud (LMC) metallicity. We identify four effects defying the conventional knowledge of binary evolution, which are all related to the proximity of the models to the Eddington limit. We find that the majority of systems undergo mass transfer during core hydrogen burning. During the ensuing nuclear timescale evolution, many mass donors remain more massive than their companions (`reverse Algols'), and nuclear timescale mass transfer may be interrupted or absent altogether. Furthermore, due to the elevated luminosity-to-mass ratio, many of the core-hydrogen-burning donors may develop Wolf-Rayet-type winds at luminosities where single stars would not. We identify observational counterparts of very massive reverse Algol binaries in the LMC and discuss their contribution to the observed hydrogen-rich Wolf-Rayet stars. We argue that understanding very massive Algol systems is key to predicting the advanced evolution of very massive binaries, including their ability to evolve into observable gravitational wave sources.
000006554 594__ $$aNO
000006554 6531_ $$astars: massive 
000006554 6531_ $$astars: evolution
000006554 6531_ $$abinaries: close
000006554 6531_ $$astars: Wolf-Rayet
000006554 6531_ $$aAstrophysics - Solar and Stellar Astrophysics
000006554 6531_ $$aAstrophysics - Astrophysics of Galaxies
000006554 700__ $$aLanger, N
000006554 700__ $$aPauli, D
000006554 700__ $$aGräfener, G
000006554 700__ $$aSchootemeijer, A
000006554 700__ $$aSana, H
000006554 700__ $$aShenar, T
000006554 700__ $$aMahy, L
000006554 700__ $$aWang, C
000006554 773__ $$c19$$nA198$$pAstronomy & Astrophysics$$v672$$y2023
000006554 8560_ $$flaurent.mahy@ksb-orb.be
000006554 8564_ $$s2911433$$uhttp://publi2-as.oma.be/record/6554/files/Sen_2023.pdf
000006554 8564_ $$s10554$$uhttp://publi2-as.oma.be/record/6554/files/Sen_2023.jpg?subformat=icon-180$$xicon-180
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000006554 905__ $$apublished in
000006554 980__ $$aREFERD