Searching for star-planet magnetic interaction in CoRoT observations

Abstract

Close-in massive planets interact with their host stars through tidal and magnetic mechanisms. In this paper, we review circumstantial evidence for star-planet interaction as revealed by the photospheric magnetic activity in some of the CoRoT planet-hosting stars, notably CoRoT-2, CoRoT-4, and CoRoT-6. The phenomena are discussed in the general framework of activity-induced features in stars accompanied by hot Jupiters. The theoretical mechanisms proposed to explain the activity enhancements possibly related with hot Jupiter are also briefly reviewed with an emphasis on the possible effects at photospheric level. The unique advantages of CoRoT and Kepler observations to test these models are pointed out.

Invited review paper accepted by Astrophysics and Space Science, 13 pages, 5 figures

References in corpus (17)

• The case for a distributed solar dynamo shaped by near-surface shear
• The On/Off Nature of Star-Planet Interactions
• Tidal dissipation in binary systems
• New observations of the extended hydrogen exosphere of the extrasolar planet HD209458b
• Extrasolar Giant Planets and X-ray Activity
• Hot Jupiters and stellar magnetic activity
• Spectropolarimetric observations of the transiting planetary system of the K dwarf HD 189733
• The magnetic field of the planet-hosting star $\tau$ Bootis
• MOST detects variability on tau Bootis possibly induced by its planetary companion
• The shocking transit of WASP-12b: Modelling the observed early ingress in the near ultraviolet
• Radio emission from exoplanets: the role of the stellar coronal density and magnetic field strength
• Comparing different approaches to model the rotational modulation of the Sun as a star
• CoRoT-2a magnetic activity: hints for possible star-planet interaction
• GMRT search for 150 MHz radio emission from the transiting extrasolar planets HD189733b and HD209458b
• Photospheric activity, rotation, and star-planet interaction of the planet-hosting star CoRoT-6
• On the Effect of Magnetic Spots on Stellar Winds and Angular Momentum Loss
• Magnetic activity in the photosphere of CoRoT-Exo-2a. Active longitudes and short-term spot cycle in a young Sun-like star

Cited by in corpus (12)

• Star-planet magnetic interaction and evaporation of planetary atmospheres
• CoRoT: harvest of the exoplanet program
• Star-planet magnetic interaction and activity in late-type stars with close-in planets
• An Ultraviolet Investigation of Activity on Exoplanet Host Stars
• A coordinated optical and X-ray spectroscopic campaign on HD179949: searching for planet-induced chromospheric and coronal activity
• Fluctuations and Flares in the Ultraviolet Line Emission of Cool Stars: Implications for Exoplanet Transit Observations
• The GAPS Programme with HARPS-N@TNG V. A comprehensive analysis of the XO-2 stellar and planetary systems
• Starspot activity and rotation of the planet-hosting star Kepler-17
• Coupled evolutions of the stellar obliquity, orbital distance, and planet's radius due to the Ohmic dissipation induced in a diamagnetic hot Jupiter around a magnetic T Tauri star
• Analysis of combined radial velocities and activity of BD+20 1790: evidence supporting the existence of a planetary companion
• Photospheric activity, rotation and magnetic interaction in LHS 6343 A
• Current state of the modelling of photospheric activity