http://arxiv.org/abs/2003.14096
We simulate the evolution of eccentric binary systems in the frame of the grazing envelope evolution (GEE) channel for the formation of Type IIb supernovae (SNe IIb), and find that extra mass removal by jets increases the parameter space for the formation of SNe IIb in this channel. To explore the role of eccentricity and the extra mass removal by jets in the GEE we use the stellar evolutionary code MESA~binary. The initial primary and secondary masses are M1i=15Mo and M2i=2.5Mo, respectively. We examine initial semi-major axes of 600-1000Ro, and eccentricities in the range of e=0-0.9. Both Roche lobe overflow (RLOF) and mass removal by jets, followed by a wind from the SN IIb progenitor, leave a hydrogen mass in the exploding star of M(H,f)=0.05Mo. This is compatible with a SN IIb progenitor. We find that in many cases, with and without the extra mass removal by jets, the system can enter a common envelope evolution (CEE) phase, and then gets out from it. Despite the large uncertainties, extra mass removal by jets substantially increases the likelihood of the system to get out from a CEE. This strengthens earlier conclusions for circular orbits. In some cases RLOF alone, without mass removal by jets, can form SN IIb progenitors. We estimate that the extra mass removal by jets in the GEE channel increases the number of progenitors relative to that by RLOF alone by about a factor of two.
D. Shishkin and N. Soker
Wed, 1 Apr 20
56/83
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