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Dynamical Effects of Stellar Companions

Published online by Cambridge University Press:  27 October 2016

Smadar Naoz
Smadar Naoz*
Affiliation:
Department of Physics and Astronomy, University of California, Los Angeles, CA 90095, USA email: snaoz@astro.ucla.edu
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Abstract

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The fraction of stellar binaries in the field is extremely high (about 40% − 70% forM > 1M⊙ stars), and thus, given this frequency, a high fraction of all exoplanetary systems may reside in binaries. While close-in giant planets tend to be found preferentially in binary stellar systems it seems that the frequency of giant planets in close binaries (>100-1000 AU) is significantly lower than in the overall population. Stellar companions gravitational perturbations may significantly alter the planetary orbits around their partner on secular timescales. They can drive planets to large eccentric orbits which can either result in plunging these planets into the star or shrinking their orbits and forming short period planets. These planets typically are misaligned with the parent star.

Keywords

(stars:) planetary systems(stars:) binaries
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 11 , General Assembly A29A: Astronomy in Focus , August 2015 , pp. 65 - 70
Copyright
Copyright © International Astronomical Union 2016 

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