Common envelope: progress and transients
arXiv:1706.07580 · doi:10.1017/S1743921317003398
Abstract
We review the fundamentals and the recent developments in understanding of common envelope physics. We report specifically on the progress that was made by the consideration of the recombination energy. This energy is found to be responsible for the complete envelope ejection in the case of a prompt binary formation, for the delayed dynamical ejections in the case of a self-regulated spiral-in, and for the steady recombination outflows during the transition between the plunge-in and the self-regulated spiral-in. Due to different ways how the recombination affects the common envelope during fast and slow spiral-ins, the apparent efficiency of the orbital energy use can be different between the two types of spiral-ins by a factor of ten. We also discuss the observational signatures of the common envelope events, their link a new class of astronomical transients, Luminous Red Novae, and to a plausible class of very luminous irregular variables.
8 pages, review given at the IAU Symposium 329, 2016 "The Lives and Death-Throes of Massive Star"
References in corpus (11)
- Low-Mass Binary Induced Outflows from Asymptotic Giant Branch Stars
- The Interaction of Stellar Objects within a Common Envelope
- Mass Transfer from Giant Donors
- Isolated vs. Common Envelope Dynamos in Planetary Nebula Progenitors
- Asymmetric Accretion Flows within a Common Envelope
- Recombination energy in double white dwarf formation
- On the Accretion-Fed Growth of Neutron Stars During Common Envelope
- On the role of recombination in common-envelope ejections
- Common envelope events with low-mass giants: understanding the transition to the slow spiral-in
- Magnetic Field Amplification During the Common Envelope Phase
- Simulating the Onset of Grazing Envelope Evolution of Binary Stars