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Paper: Gone with the wind: The elusive origin of Carbon-Enhanced Metal-Poor stars
Volume: 470, 370 Years of Astronomy in Utrecht
Page: 159
Authors: Abate, C.; Pols, O. R.; Izzard, R. G.; Mohamed, S.; de Mink, S. E.
Abstract: Among the very metal-poor stars observed in the Galactic halo many stars show a great enhancement in the abundance of carbon. These stars are called carbon-enhanced metal-poor (CEMP) stars. One explanation for the observed enhancements is that in the past CEMP stars have undergone wind mass-transfer from an AGB binary companion. Recent hydrodynamical simulations suggest a wind-accretion model applies in the case of slow and dense AGB winds: wind Roche-lobe overflow (WRLOF), that predicts accretion efficiencies much higher than the canonical predictions. We present results of binary population simulations in which we explore the consequences of the WRLOF model for the population of CEMP stars.
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