Results 1 to 10 of about 8,194 (235)
Analogous response of temperate terrestrial exoplanets and Earth's climate dynamics to greenhouse gas supplement. [PDF]
Sci Rep, 2023 AbstractHumanity is close to characterizing the atmospheres of rocky exoplanets due to the advent of JWST. These astronomical observations motivate us to understand exoplanetary atmospheres to constrain habitability. We study the influence greenhouse gas supplement has on the atmosphere of TRAPPIST-1e, an Earth-like exoplanet, and Earth itself by ...
Hochman A, Komacek TD, De Luca P.
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Impact of Lorentz violation models on exoplanets dynamics [PDF]
Universe, 2022 Many exoplanets have been detected by the radial velocity method, according to which the motion of a binary system around its center of mass can produce a periodical variation of the Doppler effect of the light emitted by the host star. These variations are influenced by both Newtonian and non-Newtonian perturbations to the dominant inverse-square ...
Antonio Gallerati +2 more
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The Diversity of Exoplanets: From Interior Dynamics to Surface Expressions [PDF]
Elements, 2021 The coupled interior–atmosphere system of terrestrial exoplanets remains poorly understood. Exoplanets show a wide variety of sizes, densities, surface temperatures, and interior structures, with important knock-on effects for this coupled system. Many exoplanets are predicted to have a “stagnant lid” at the surface, with a rigid stationary crust ...
Maxim Ballmer, Lena Noack
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Secular spin-axis dynamics of exoplanets (Corrigendum) [PDF]
Astronomy & Astrophysics, 2019 International ...
Melaine Saillenfest +2 more
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Tidal dynamics of transiting exoplanets [PDF]
Proceedings of the International Astronomical Union, 2010 AbstractTransits give us the mass, radius, and orbital properties of the planet, all of which inform dynamical theories. Two properties of the hot Jupiters suggest they had a dramatic origin via tidal damping from high eccentricity. First, the tidally circularized planets (in the 1-4 day pile-up) lie along a relation or boundary in the mass-period ...
Daniel C. Fabrycky
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Secular spin-axis dynamics of exoplanets [PDF]
Astronomy & Astrophysics, 2019 Context. Seasonal variations and climate stability of a planet are very sensitive to the planet obliquity and its evolution. This is of particular interest for the emergence and sustainability of land-based life, but orbital and rotational parameters of exoplanets are still poorly constrained.
Melaine Saillenfest +2 more
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Atmospheric Dynamics of Hot Exoplanets [PDF]
Annual Review of Earth and Planetary Sciences, 2015 The characterization of exoplanetary atmospheres has come of age in the past decade, as astronomical techniques now allow for albedos, chemical abundances, temperature profiles and maps, rotation periods, and even wind speeds to be measured. Atmospheric dynamics sets the background state of density, temperature, and velocity that determines or ...
Kevin Heng, Adam P. Showman
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Secular orbital dynamics of the innermost exoplanet of the $$\upsilon $$-Andromedæ system [PDF]
Celestial Mechanics and Dynamical Astronomy, 2023 AbstractWe introduce a quasi-periodic restricted Hamiltonian to describe the secular motion of a small-mass planet in a multi-planetary system. In particular, we refer to the motion of $$\upsilon $$ υ -And $$\textbf{b}$$ b which is the innermost planet among those discovered in the ...
Rita Mastroianni, Ugo Locatelli
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DYNAMICS AND TRANSIT VARIATIONS OF RESONANT EXOPLANETS [PDF]
The Astrophysical Journal, 2016 ABSTRACT Transit timing variations (TTVs) are deviations of the measured midtransit times from the exact periodicity. One of the most interesting causes of TTVs is the gravitational interaction between planets. Here we consider a case of two planets in a mean motion resonance (orbital periods in a ratio of small integers).
David Nesvorný, David Vokrouhlický
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Predicted Number, Multiplicity, and Orbital Dynamics of TESS M-dwarf Exoplanets [PDF]
The Astronomical Journal, 2019 Abstract We present a study of the M-dwarf exoplanetary systems forthcoming from NASA’s TESS mission. While the mission’s footprint is too complex to be characterized by a single detection completeness, we extract ensemble completeness functions that recover the planet detections from previous work for stars between 3200 and 4000 K.
Sarah Ballard
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