Hot super-Earths stripped by their host stars

Research output: Contribution to journalArticle

Authors

  • M. S. Lundkvist
  • H. Kjeldsen
  • S. Albrecht
  • S. Basu
  • D. Huber
  • A. B. Justesen
  • C. Karoff
  • V. Silva Aguirre
  • V. Van Eylen
  • C. Vang
  • T. Arentoft
  • T. Barclay
  • T. R. Bedding
  • J. Christensen-Dalsgaard
  • R. L. Gilliland
  • Saskia Hekker
  • S. D. Kawaler
  • Mikkel Lund
  • T. S. Metcalfe
  • Andrea Miglio
  • J. F. Rowe
  • D. Stello
  • B. Tingley
  • T. R. White

Colleges, School and Institutes

Abstract

Simulations predict that hot super-Earth sized exoplanets can have their envelopes stripped by photo-evaporation, which would present itself as a lack of these exoplanets. However, this absence in the exoplanet population has escaped a firm detection. Here we demonstrate, using asteroseismology on a sample of exoplanets and exoplanet candidates observed during the Kepler mission that, while there is an abundance of super-Earth sized exoplanets with low incident fluxes, none are found with high incident fluxes. We do not find any exoplanets with radii between 2.2 and 3.8 Earth radii with incident flux above 650 times the incident flux on Earth. This gap in the population of exoplanets is explained by evaporation of volatile elements and thus supports the predictions. The confirmation of a hot-super-Earth desert caused by evaporation will add an important constraint on simulations of planetary systems, since they must be able to reproduce the dearth of close-in super-Earths.

Bibliographic note

18 pages, 7 figures

Details

Original languageEnglish
Article number11201
JournalNature Communications
Volume7
Publication statusPublished - 18 Apr 2016

Keywords

  • astro-ph.EP