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Planetary migration

Published online by Cambridge University Press:  22 October 2009

Philip J. Armitage
Affiliation:
JILA, 440 UCB, University of Colorado, Boulder, CO 80309, USA: Department of Astrophysical and Planetary Sciences, University of Colorado, Boulder, CO 80309, USA
W. K. M. Rice
Affiliation:
Institute of Geophysics and Planetary Physics and Department of Earth Sciences, University of California, Riverside, CA 92521, USA
Mario Livio
Affiliation:
Space Telescope Science Institute, Baltimore
Kailash Sahu
Affiliation:
Space Telescope Science Institute, Baltimore
Jeff Valenti
Affiliation:
Space Telescope Science Institute, Baltimore
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Summary

Gravitational torques between a planet and gas in the protoplanetary disk result in orbital migration of the planet, and modification of the disk surface density. Migration via this mechanism is likely to play an important role in the formation and early evolution of planetary systems. For masses comparable to those of observed giant extrasolar planets, the interaction with the disk is strong enough to form a gap, leading to coupled evolution of the planet and disk on a viscous time scale (Type II migration). Both the existence of hot Jupiters and the statistical distribution of observed orbital radii are consistent with an important role for Type II migration in the history of currently observed systems. We discuss the possibility of improving constraints on migration by including information on the host stars' metallicity, and note that migration could also form a population of massive planets at large orbital radii that may be indirectly detected via their influence on debris disks. For lower mass planets with Mp ~ M, surface density perturbations created by the planet are small, and migration in a laminar disk is driven by an intrinsic and apparently robust asymmetry between interior and exterior torques. Analytic and numerical calculations of this Type I migration are in reasonable accord, and predict rapid orbital decay during the final stages of the formation of giant planet cores.

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Chapter
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A Decade of Extrasolar Planets around Normal Stars
Proceedings of the Space Telescope Science Institute Symposium, held in Baltimore, Maryland May 2–5, 2005
, pp. 66 - 83
Publisher: Cambridge University Press
Print publication year: 2008

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  • Planetary migration
    • By Philip J. Armitage, JILA, 440 UCB, University of Colorado, Boulder, CO 80309, USA: Department of Astrophysical and Planetary Sciences, University of Colorado, Boulder, CO 80309, USA, W. K. M. Rice, Institute of Geophysics and Planetary Physics and Department of Earth Sciences, University of California, Riverside, CA 92521, USA
  • Edited by Mario Livio, Space Telescope Science Institute, Baltimore, Kailash Sahu, Space Telescope Science Institute, Baltimore, Jeff Valenti, Space Telescope Science Institute, Baltimore
  • Book: A Decade of Extrasolar Planets around Normal Stars
  • Online publication: 22 October 2009
  • Chapter DOI: https://doi.org/10.1017/CBO9780511536304.008
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  • Planetary migration
    • By Philip J. Armitage, JILA, 440 UCB, University of Colorado, Boulder, CO 80309, USA: Department of Astrophysical and Planetary Sciences, University of Colorado, Boulder, CO 80309, USA, W. K. M. Rice, Institute of Geophysics and Planetary Physics and Department of Earth Sciences, University of California, Riverside, CA 92521, USA
  • Edited by Mario Livio, Space Telescope Science Institute, Baltimore, Kailash Sahu, Space Telescope Science Institute, Baltimore, Jeff Valenti, Space Telescope Science Institute, Baltimore
  • Book: A Decade of Extrasolar Planets around Normal Stars
  • Online publication: 22 October 2009
  • Chapter DOI: https://doi.org/10.1017/CBO9780511536304.008
Available formats
×

Save book to Google Drive

To save content items to your account, please confirm that you agree to abide by our usage policies. If this is the first time you use this feature, you will be asked to authorise Cambridge Core to connect with your account. Find out more about saving content to Google Drive.

  • Planetary migration
    • By Philip J. Armitage, JILA, 440 UCB, University of Colorado, Boulder, CO 80309, USA: Department of Astrophysical and Planetary Sciences, University of Colorado, Boulder, CO 80309, USA, W. K. M. Rice, Institute of Geophysics and Planetary Physics and Department of Earth Sciences, University of California, Riverside, CA 92521, USA
  • Edited by Mario Livio, Space Telescope Science Institute, Baltimore, Kailash Sahu, Space Telescope Science Institute, Baltimore, Jeff Valenti, Space Telescope Science Institute, Baltimore
  • Book: A Decade of Extrasolar Planets around Normal Stars
  • Online publication: 22 October 2009
  • Chapter DOI: https://doi.org/10.1017/CBO9780511536304.008
Available formats
×