Please use this identifier to cite or link to this item:
http://hdl.handle.net/10773/15000
Title: | Spin evolution of Earth-sized exoplanets, including atmospheric tides and core-mantle friction |
Author: | Cunha, Diana Correia, Alexandre C. M. Laskar, Jacques |
Keywords: | Atmospheres Dynamical evolution and stability Planets and satellites |
Issue Date: | Apr-2015 |
Publisher: | Cambridge University Press |
Abstract: | Planets with masses between 0.1 and 10M(circle plus) are believed to host dense atmospheres. These atmospheres can play an important role on the planet's spin evolution, since thermal atmospheric tides, driven by the host star, may counterbalance gravitational tides. In this work, we study the long-term spin evolution of Earth-sized exoplanets. We generalize previous works by including the effect of eccentric orbits and obliquity. We show that under the effect of tides and core-mantle friction, the obliquity of the planets evolves either to 0 degrees or 180 degrees. The rotation of these planets is also expected to evolve into a very restricted number of equilibrium configurations. In general, none of these equilibria is synchronous with the orbital mean motion. The role of thermal atmospheric tides becomes more important for Earth-sized planets in the habitable zones of their systems; so they cannot be neglected when we search for their potential habitability. |
Peer review: | yes |
URI: | http://hdl.handle.net/10773/15000 |
DOI: | 10.1017/S1473550414000226 |
ISSN: | 1473-5504 |
Appears in Collections: | CIDMA - Artigos DFis - Artigos GGDG - Artigos |
Files in This Item:
File | Description | Size | Format | |
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Cunha_etal_2015.pdf | 1.66 MB | Adobe PDF |
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