Results 41 to 50 of about 2,143 (179)

Amplifying Resonant Repulsion with Inflated Young Planets, Overlooked Inner Planets, and Nonzero Initial Δ

The Astrophysical Journal
Most multiplanet systems around mature (∼5 Gyr old) host stars are nonresonant. Even the near-resonant planet pairs still display 1%–2% positive deviation from perfect period commensurabilities (Δ) near first-order mean motion resonances (MMRs). Resonant
Yuancheng Xu, Fei Dai
doaj   +1 more source

Tidally-driven Roche-Lobe Overflow of Hot Jupiters with MESA [PDF]

, 2015
Many exoplanets have now been detected in orbits with ultra-short periods, very close to the Roche limit. Building upon our previous work, we study the possibility that mass loss through Roche lobe overflow (RLO) may affect the evolution of these planets,
Marchant, Pablo, Rappaport, Saul, Rasio, Frederic A., Rogers, Leslie A., Valsecchi, Francesca   +4 more
core   +3 more sources

Evolution of Terrestrial Planetary Bodies and Implications for Habitability

Reviews of Geophysics, Volume 63, Issue 4, December 2025.
Abstract The terrestrial planetary bodies of our solar system—Mercury, Venus, Earth, and Mars—share a common origin through nebular accretion and early magma ocean differentiation, yet they diverged significantly in geological evolution, tectonic regimes, and habitability.
Peter A. Cawood, Eva E. Stüeken, Priyadarshi Chowdhury, Chris J. Hawkesworth, Jacob A. Mulder   +4 more
wiley   +1 more source

Self-consistent Dynamical and Chaotic Tides in the REBOUNDx Framework

The Astrophysical Journal
At high eccentricities, tidal forcing excites vibrational modes within orbiting bodies known as dynamical tides. In this paper, we implement the coupled evolution of these modes with the body’s orbit in the REBOUNDx framework, an extension to the popular
Donald Liveoak, Sarah C. Millholland, Michelle Vick, Daniel Tamayo   +3 more
doaj   +1 more source

Constraining Tidal Dissipation in Stars from The Destruction Rates of Exoplanets

, 2012
We use the distribution of extrasolar planets in circular orbits around stars with surface convective zones detected by ground based transit searches to constrain how efficiently tides raised by the planet are dissipated on the parent star.
Allain, Anderson, Bakos, Bakos, Bakos, Bakos, Bayliss, Bouwman, Brian Jackson, Buchhave, Buchhave, Burke, Burke, Béky, Chan, Denissenkov, Enoch, Enoch, Federico Spada, Fischer, Goldreich, Goodman, Haisch, Hansen, Hartman, Hartman, Hartman, Hartman, Hartman, Hellier, Ibgui, Irwin, Jackson, Jackson, Johnson, Johnson, Kaloyan Penev, Kaula, Kipping, Levrard, Lister, Liu, MacGregor, Maxted, Meibom, Miller, Narita, Narita, Narita, Narita, Nicole Thom, Ogilvie, Ogilvie, Papaloizou, Papaloizou, Papaloizou, Penev, Penev, Penev, Penev, Penev, Queloz, Quinn, Sanchis-Ojeda, Savonije, Schlaufman, Simpson, Sozzetti, Sozzetti, Street, Takeda, Terquem, Tripathi, West, Wilson, Winn, Winn, Winn, Winn, Winn, Winn, Wu, Wu, Zahn, Zahn, Zahn, Zahn, Zahn   +87 more
core   +1 more source

Climate Emergency and Different Ways to Fail? The Fermi Paradox, the Simulation Hypothesis, Agency and Hope

Journal for the Theory of Social Behaviour, Volume 55, Issue 4, December 2025.
ABSTRACT Humanity seems stuck on different ways to fail to meet the challenge posed by a declared climate emergency and manifest problems of ecological breakdown. Rather than reprise these failures, we use the Fermi Paradox and simulation hypothesis to make a simple point about agency. The argument unfolds in two sections.
Jamie Morgan
wiley   +1 more source

Tidally Torn: Why the Most Common Stars May Lack Large, Habitable-zone Moons

The Astronomical Journal
Earth-like planets in the habitable zone (HZ) of M dwarfs have recently been targeted in the search for exomoons. We study the stability and lifetime of large (Luna-like) moons, accounting for the effects of three-body interactions and tidal forces using
Shaan D. Patel, Billy Quarles, Nevin N. Weinberg, Manfred Cuntz   +3 more
doaj   +1 more source

Survey and Modeling of Windblown Ejecta Deposits on Venus

AGU Advances, Volume 6, Issue 5, October 2025.
Abstract Venus' thick atmosphere rotates in the same direction as the solid body, but ∼60 times faster. This atmospheric superrotation has produced dozens of windblown ejecta deposits (“parabolas”) on the surface of Venus. The formation and modification of parabolas is an interplay between impacts, aeolian modification, and atmospheric dynamics.
T. J. Austin, J. G. O’Rourke, N. Izenberg, E. A. Silber   +3 more
wiley   +1 more source

Coupled Planetary Interior and Tidal Evolution

The Astrophysical Journal
We present a new planetary structure/thermal evolution model, designed for use in problems that couple orbital dynamics with planetary structure. We first benchmark our structural/thermal evolution calculations against the MESA stellar evolution code ...
Tim Hallatt, Sarah Millholland
doaj   +1 more source

Electrical Resistivity of Liquid Fe‐16S‐2Si up to 13 GPa With Implications for the Adiabatic Heat Flux Through the Core of Exoplanet TRAPPIST‐1h

Journal of Geophysical Research: Planets, Volume 130, Issue 10, October 2025.
Abstract Thermal convective processes in the liquid cores of terrestrial planetary bodies with the capacity to generate magnetic dynamos may be better characterized by thermal conductivity estimates of core conditions. The composition of the core of asteroid 4 Vesta as determined by geochemical studies of HED meteorites is used as an analog for the ...
E. M. Lenhart, W. Yong, R. A. Secco
wiley   +1 more source