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Anders Johansen. Profile picture.

Anders Johansen

Professor

Anders Johansen. Profile picture.

Forming Planets via Pebble Accretion

Author

  • Anders Johansen
  • Michiel Lambrechts

Summary, in English

The detection and characterization of large populations of pebbles in protoplanetary disks have motivated the study of pebble accretion as a driver of planetary growth. This review covers all aspects of planet formation by pebble accretion, from dust growth over planetesimal formation to the accretion of protoplanets and fully grown planets with gaseous envelopes. Pebbles are accreted at a very high rate-orders of magnitude higher than planetesimal accretion-and the rate decreases only slowly with distance from the central star. This allows planetary cores to start their growth in much more distant positions than their final orbits. The giant planets orbiting our Sun and other stars, including systems of wide-orbit exoplanets, can therefore be formed in complete consistency with planetary migration. We demonstrate how growth tracks of planetary mass versus semimajor axis can be obtained for all the major classes of planets by integrating a relatively simple set of governing equations.

Department/s

  • Lund Observatory

Publishing year

2017-08-30

Language

English

Pages

359-387

Publication/Series

Annual Review of Earth and Planetary Sciences

Volume

45

Document type

Journal article

Publisher

Annual Reviews

Topic

  • Astronomy, Astrophysics and Cosmology

Keywords

  • Formation of planets and satellites
  • Gaseous planets
  • Planet-disk interactions
  • Planetary systems
  • Protoplanetary disks

Status

Published

ISBN/ISSN/Other

  • ISSN: 0084-6597