Star-planet interactions

Evgenya Shkolnik, Suzanne Aigrain, Steven Cranmer, Rim Fares, Malcolm Fridlund, Frederic Pont, Jürgen Schmitt, Alexis Smith, Takeru Suzuki

Research output: Contribution to journalConference articlepeer-review

8 Citations (Scopus)


Much effort has been invested in recent years, both observationally and theoretically, to understand the interacting processes taking place in planetary systems consisting of a hot Jupiter orbiting its star within 10 stellar radii. Several independent studies have converged on the same scenario: that a short-period planet can induce activity on the photosphere and upper atmosphere of its host star. The growing body of evidence for such magnetic star-planet interactions includes a diverse array of photometric, spectroscopic and spectropolarimetric studies. The nature of which is modeled to be strongly affected by both the stellar and planetary magnetic fields, possibly influencing the magnetic activity of both bodies, as well as affecting irradiation and non-thermal and dynamical processes. Tidal interactions are responsible for the circularization of the planet orbit, for the synchronization of the planet rotation with the orbital period, and may also synchronize the outer convective envelope of the star with the planet. Studying such star-planet interactions (SPI) aids our understanding of the formation, migration and evolution of hot Jupiters. In this proceeding, we briefly summarise the observations and theories presented during the Cool Stars 15 splinter session1 of this diverse and growing field of star-planet interactions.

Original languageEnglish
Pages (from-to)275-282
Number of pages8
JournalAIP Conference Proceedings
Publication statusPublished - 2009
Externally publishedYes
Event15th Cambridge Workshop on Cool Stars, Stellar Systems and the Sun - St. Andrews, United Kingdom
Duration: Jul 21 2008Jul 25 2008


  • Exoplanets
  • Mhd
  • Radio emission
  • Spectropolarimetry
  • Spectroscopy
  • Stellar activity

ASJC Scopus subject areas

  • General Physics and Astronomy


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