TL;DR
This paper reviews how tidal interactions between close-in exoplanets and their host stars can influence stellar activity and planetary orbital evolution, highlighting recent observational findings and their implications.
Contribution
It provides a comprehensive review of recent observational evidence linking tidal effects to increased stellar activity in systems with close-in exoplanets.
Findings
Tidal interactions can lead to increased stellar rotation and activity.
Close-in exoplanets may experience orbital decay due to tidal forces.
Enhanced stellar turbulence may alter magnetic activity observations.
Abstract
The architecture of many exoplanetary systems is different from the solar system, with exoplanets being in close orbits around their host stars and having orbital periods of only a few days. We can expect interactions between the star and the exoplanet for such systems that are similar to the tidal interactions observed in close stellar binary systems. For the exoplanet, tidal interaction can lead to circularization of its orbit and the synchronization of its rotational and orbital period. For the host star, it has long been speculated if significant angular momentum transfer can take place between the planetary orbit and the stellar rotation. In the case of the Earth-Moon system, such tidal interaction has led to an increasing distance between Earth and Moon. For stars with Hot Jupiters, where the orbital period of the exoplanet is typically shorter than the stellar rotation period,…
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