Intermediate luminosity optical transients during the grazing envelope evolution (GEE)

Abstract

By comparing photon diffusion time with gas outflow time, I argue that a large fraction of the energy carried by the jets during the grazing envelope evolution (GEE) might end in radiation, hence leading to an intermediate luminosity optical transient (ILOT). In the GEE a companion orbiting near the outskirts of the larger primary star accretes mass through an accretion disk, and launches jets that efficiently remove the envelope gas from the vicinity of the secondary star. In cases of high mass accretion rates onto the stellar companion the energy carried by the jets surpass the recombination energy from the ejected mass, and when the primary star is a giant this energy surpasses also the gravitational binding energy of the binary system. Some future ILOTs of giant stars might be better explained by the GEE than by merger and common envelope evolution without jets.

New Astronomy, in press

References in corpus (4)

• Almost Gone: SN~2008S and NGC~300 2008OT-1 are Fainter than their Progenitors
• Binary interactions with high accretion rates onto main sequence stars
• Common Powering Mechanism of Intermediate Luminosity Optical Transients and Luminous Blue Variables
• Final common envelope ejection by migration and jets

Cited by in corpus (27)

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