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Successive common envelope events from multiple planets
By Luke Chamandy, Eric G Blackman, Jason Nordhaus, Emily Wilson
Published in Monthly Notices of the Royal Astronomical Society 502, L110–L114 (Monday, February 15, 2021)


Many stars harbour multiplanet systems. As these stars expand late in their evolutions, the innermost planet may be engulfed, leading to a common envelope (CE) event. Even if this is insufficient to eject the envelope, it may expand the star further, causing additional CE events, with the last one unbinding what remains of the envelope. This multiplanet CE scenario may have broad implications for stellar and planetary evolution across a range of systems. We develop a simplified version and show that it may be able to explain the recently observed planet WD 1856 b.

CCRG Authors

Nordhaus, JasonWilson, Emily