Results 1 to 10 of about 10,991 (143)
Proceedings of the International Astronomical Union, 2021 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
S. Ferraz‐Mello
arxiv +7 more sources
Do Tides Destabilize Trojan Exoplanets? [PDF]
ICARUS Volume 385, October 2022, 115087, 2022 One outstanding problem in extrasolar planet studies is why no co-orbital exoplanets have been found, despite numerous searches among the many known planetary systems, many of them in other mean-motion resonances. Here we examine the hypothesis that dissipation of energy by tides in Trojan planets is preventing their survival.
Anthony R. Dobrovolskis +1 more
arxiv +5 more sources
Spin evolution of Earth-sized exoplanets, including atmospheric tides and core-mantle friction [PDF]
International Journal of Astrobiology, 2014 Planets with masses between 0.1 - 10 M_earth 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.
Cunha, Diana +2 more
arxiv +10 more sources
The Radial Velocity Signature of Tides Raised in Stars Hosting Exoplanets [PDF]
Monthly Notices of the Royal Astronomical Society, 2011 Close-in, massive exoplanets raise significant tides in their stellar hosts. We compute the radial velocity (RV) signal due to this fluid motion in the equilibrium tide approximation. The predicted radial velocities in the observed sample of exoplanets exceed 1 m/s for 17 systems, with the largest predicted signal being ~30 m/s for WASP-18 b.
Arras, Phil +3 more
arxiv +10 more sources
Exoplanets Torqued by the Combined Tides of a Moon and Parent Star [PDF]
The Astronomical Journal, 2018 In recent years, there has been interest in Earth-like exoplanets in the habitable zones of low mass stars ($\sim0.1-0.6\,M_\odot$). Furthermore, it has been argued that a large moon may be important for stabilizing conditions on a planet for life. If these two features are combined, then an exoplanet can feel a similar tidal influence from both its ...
Anthony L. Piro
arxiv +6 more sources
Implications of tides for life on exoplanets [PDF]
Astrobiology, Vol. 18, No. 7, 967-982 (2018), 2017 As evident from the nearby examples of Proxima Centauri and TRAPPIST-1, Earth-sized planets in the habitable zone of low-mass stars are common. Here, we focus on such planetary systems and argue that their (oceanic) tides could be more prominent due to stronger tidal forces.
Manasvi Lingam, Abraham Loeb
arxiv +9 more sources
An apparently eccentric orbit of the exoplanet WASP-12 b as a radial velocity signature of planetary-induced tides in the host star [PDF]
The Astrophysical Journal, 2019 Massive exoplanets on extremely tight orbits, such as WASP-12 b, induce equilibrium tides in their host stars. Following the orbital motion of the planet, the tidal fluid flow in the star can be detected with the radial velocity method. Its signature manifests as the second harmonics of the orbital frequency that mimics a non-zero orbital eccentricity.
Gracjan Maciejewski +4 more
arxiv +8 more sources
Thermal Tides in Short Period Exoplanets [PDF]
arXiv, 2009 Time-dependent insolation in a planetary atmosphere induces a mass quadrupole upon which the stellar tidal acceleration can exert a force. This "thermal tide" force can give rise to secular torques on the planet and orbit as well as radial forces causing eccentricity evolution.
Arras, Phil, Socrates, Aristotle
arxiv +5 more sources
Tides on Lava Worlds: Application to Close-in Exoplanets and the Early Earth–Moon System [PDF]
The Astrophysical JournalUnderstanding the physics of planetary magma oceans has been the subject of growing efforts, in light of the increasing abundance of solar system samples and extrasolar surveys.
Mohammad Farhat +4 more
doaj +6 more sources
Impact of Tides on the Potential for Exoplanets to Host Exomoons [PDF]
The Astronomical Journal, 2020 Exomoons may play an important role in determining the habitability of worlds outside of our solar system. They can stabilize conditions, alter the climate by breaking tidal locking with the parent star, drive tidal heating, and perhaps even host life themselves.
Tokadjian, Armen, Piro, Anthony
arxiv +8 more sources