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On Tides and Exoplanets

Published online by Cambridge University Press:  30 May 2022

S. Ferraz-Mello Open the ORCID record for S. Ferraz-Mello [Opens in a new window]
S. Ferraz-Mello*
Affiliation:
Instituto de Astronomia, Geofsica e Ciências Atmosféricas, Universidade de São Paulo, Brasil email: sylvio@usp.br
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Abstract

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This paper reviews the basic equations used in the study of the tidal variations of the rotational and orbital elements of a system formed by one star and one close-in planet as given by the creep tide theory and Darwin’s constant time lag (CTL) theory. At the end, it reviews and discusses the determinations of the relaxation factors (and time lags) in the case of host stars and hot Jupiters based on actual observations of orbital decay, stellar rotation and age, etc. It also includes a recollection of the basic facts concerning the variations of the rotation of host stars due to the leakage of angular momentum associated with stellar winds.

Type
Research Article
Information
Proceedings of the International Astronomical Union , Volume 15 , Symposium S364: Multi-scale (Time and Mass) Dynamics of Space Objects (Oct 2021) , October 2019 , pp. 20 - 30
Copyright
© The Author(s), 2022. Published by Cambridge University Press on behalf of International Astronomical Union

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