Constraints from Planets in Binaries

  • Kaitlin M. Kratter
Part of the Astrophysics and Space Science Library book series (ASSL, volume 445)


In this chapter I will discuss how planets place powerful constraints on the formation and early evolution of binary star systems. In addition, these systems demonstrate extreme modes of planet formation that can inform models of our own Solar System. I begin with a very brief overview of the theoretical mechanisms for forming binaries and their planets. I will present as case studies two triple-star systems comprising at least one planet orbiting one of the stars. Combining the information from these studies reveals that (1) many binaries with periods of 10–100 s of days form in their current orbital configurations as part of the star formation process (2) the frequency of tertiary companions in close binary systems may be indicative of three body instabilities other than the Kozai-Lidov mechanism (3) planet formation can proceed in highly perturbed, truncated disks, (4) a reservoir of material beyond the ice line may not be required to instigate planet formation.



KMK is supported by the National Science Foundation under Grant No. AST-1410174.


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© Springer International Publishing AG 2017

Authors and Affiliations

  1. 1.Department of AstronomyUniversity of ArizonaTucsonUSA

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