Energizing the last phase of common envelope removal

Understand

We propose a scenario where a companion that is about to exit a common envelope evolution (CEE) with a giant star accretes mass from the remaining envelope outside its deep orbit and launches jets that facilitate the removal of the remaining envelope.

• The jets that the accretion disk launches collide with the envelope and form hot bubbles that energize the envelope.
• Due to gravitational interaction with the envelope, that might reside in a circumbinary disk, the companion migrates further in, but the inner boundary of the circumbinary disk continues to feed the accretion disk.
• While near the equatorial plane mass leaves the system at a very low velocity, along the polar directions velocities are very high.