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Anders Johansen. Profile picture.

Anders Johansen

Professor

Anders Johansen. Profile picture.

The origin of the occurrence rate profile of gas giants inside 100 d

Author

  • Mohamad Ali-Dib
  • Anders Johansen
  • Chelsea X. Huang

Summary, in English

We investigate the origin of the period distribution of giant planets. We fit the bias-corrected distribution of gas-giant planets inside 300 d found by Santerne et al. using a planet formation model based on pebble accretion. We investigate two possible initial conditions: a linear distribution of planetary seeds, and seeds injected exclusively on the water and CO icelines. Our simulations exclude the linear initial distribution of seeds with a high degree of confidence. Our bimodal model based on snowlines gives a more reasonable fit to the data, with the discrepancies reducing significantly if we assume the water snowline to be a factor of 3-10 less efficient at producing planets. This model moreover performs better on both the warm/hot Jupiters ratio and a Gaussian mixture model as comparison criteria. Our results hint that the gas-giant exoplanets population inside 300 d is more compatible with planets forming preferentially at special locations.

Department/s

  • Lund Observatory
  • eSSENCE: The e-Science Collaboration

Publishing year

2017-01-01

Language

English

Pages

5016-5022

Publication/Series

Monthly Notices of the Royal Astronomical Society

Volume

469

Issue

4

Document type

Journal article

Publisher

Oxford University Press

Topic

  • Astronomy, Astrophysics and Cosmology

Keywords

  • Planets and satellites: formation

Status

Published

ISBN/ISSN/Other

  • ISSN: 0035-8711