Ivanova, N., Justham, S., Chen, X., Marco, O., Fryer, C. L., Gaburov, E., Ge, H., Glebbeek, E., Han, Z., Li, X.-D., Lu, G., Marsh, Tom, Podsiadlowski, P., Potter, A., Soker, N., Taam, R., Tauris, T. M., Heuvel, E. P. J. and Webbink, R. F. (2013) Common envelope evolution : where we stand and how we can move forward. The Astronomy and Astrophysics Review, Volume 21 (Number 1). doi:10.1007/s00159-013-0059-2 ISSN 0935-4956.

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Abstract

This work aims to present our current best physical understanding of common-envelope evolution (CEE). We highlight areas of consensus and disagreement, and stress ideas which should point the way forward for progress in this important but long-standing and largely unconquered problem. Unusually for CEE-related work, we mostly try to avoid relying on results from population synthesis or observations, in order to avoid potentially being misled by previous misunderstandings. As far as possible we debate all the relevant issues starting from physics alone, all the way from the evolution of the binary system immediately before CEE begins to the processes which might occur just after the ejection of the envelope. In particular, we include extensive discussion about the energy sources and sinks operating in CEE, and hence examine the foundations of the standard energy formalism. Special attention is also given to comparing the results of hydrodynamic simulations from different groups and to discussing the potential effect of initial conditions on the differences in the outcomes. We compare current numerical techniques for the problem of CEE and also whether more appropriate tools could and should be produced (including new formulations of computational hydrodynamics, and attempts to include 3D processes within 1D codes). Finally we explore new ways to link CEE with observations. We compare previous simulations of CEE to the recent outburst from V1309 Sco, and discuss to what extent post-common-envelope binaries and nebulae can provide information, e.g. from binary eccentricities, which is not currently being fully exploited.

Item Type:	Journal Article
Divisions:	Faculty of Science, Engineering and Medicine > Science > Physics
Journal or Publication Title:	The Astronomy and Astrophysics Review
Publisher:	Springer
ISSN:	0935-4956
Official Date:	February 2013
Dates:	Date Event February 2013 Published
Volume:	Volume 21
Number:	Number 1
DOI:	10.1007/s00159-013-0059-2
Status:	Peer Reviewed
Publication Status:	Published
Access rights to Published version:	Restricted or Subscription Access

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