PUMPING THE ECCENTRICITY OF EXOPLANETS BY TIDAL EFFECT
Journal Article
·
· Astrophysical Journal Letters
- Department of Physics, I3N, University of Aveiro, Campus de Santiago, 3810-193 Aveiro (Portugal)
- Astronomie et Systemes Dynamiques, IMCCE-CNRS UMR8028, 77 Av. Denfert-Rochereau, 75014 Paris (France)
Planets close to their host stars are believed to undergo significant tidal interactions, leading to a progressive damping of the orbital eccentricity. Here we show that when the orbit of the planet is excited by an outer companion, tidal effects combined with gravitational interactions may give rise to a secular increasing drift on the eccentricity. As long as this secular drift counterbalances the damping effect, the eccentricity can increase to high values. This mechanism may explain why some of the moderate close-in exoplanets are observed with substantial eccentricity values.
- OSTI ID:
- 22047237
- Journal Information:
- Astrophysical Journal Letters, Vol. 744, Issue 2; Other Information: Country of input: International Atomic Energy Agency (IAEA); ISSN 2041-8205
- Country of Publication:
- United States
- Language:
- English
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