Applying Wind Roche-Lobe Overflow in Binary Evolution using MESA and POSYDON

Wind Roche-Lobe Overflow (WRLOF) is a mechanism of mass transfer in a binary system where the wind acceleration zone radius of the donor exceeds the Roche-lobe radius and the stellar wind transfers mass to the accretor. The disagreement between the observed and modeled population of carbon-enhanced metal-poor (CEMP) stars has been reduced when including the effect of WRLOF. However, apart from fast population synthesis codes, WRLOF has not yet been applied to detailed binary evolution with a large parameter range. We implement WRLOF in MESA and POSYDON for low mass stars with metallicity Z = 0.01 solar metallicity. We find that when using WRLOF, the accretor gains ~0.05 solar masses from wind accretion and evolves off the main sequence earlier. After gaining mass from the donor through wind accretion, the wind of the accretor is enhanced because the accretor begins to leave the main sequence, and therefore the mass loss rate of the accretor increases. Modeling WRLOF in binaries will therefore be integral to understanding these systems.