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Early Orbital Evolution of Binaries: Overview and Outlook

Published online by Cambridge University Press:  13 May 2016

Pawel Artymowicz  and
Stephen H. Lubow
Pawel Artymowicz
Affiliation:
Stockholm Observatory, SE-13336 Saltsjöbaden, Sweden, [email protected]
Stephen H. Lubow
Affiliation:
Space Telescope Science Institute, 3700 San Martin Dr., Baltimore, MD 21218, USA, [email protected]

Abstract

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The orbital evolution of a young binary star is strongly affected by the circumstellar disks orbiting each of the stars, and/or the circumbinary disk orbiting about the entire binary. Calculation of the evolution requires the knowledge of disk structure (resonantly emitted density and bending waves, disk gap sizes, possible secular nonaxisymmetry), as well as of any gas streamers falling onto the binary. While the diagnostic signatures of the binary-disk interaction are observable (and have recently been observed), the orbital evolution cannot directly be observed so far, because of long associated time scales. Hence, theory is crucial for understanding the evolutionary stage and the future of the observed systems. We briefly review the status of the theory of orbital evolution and discuss several topics requiring further theoretical work.

Type
X. Evolution of Young Binary Systems
Information
Symposium - International Astronomical Union , Volume 200: The Formation of Binary Stars , 2001 , pp. 439 - 448
Copyright
Copyright © Astronomical Society of the Pacific 2001 

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