Results 51 to 60 of about 8,792 (213)

Impact of Stellar Dynamics on the Frequency of Giant Planets in Close Binaries [PDF]

, 2006
Hostile tidal forces may inhibit the formation of Jovian planets in binaries with semimajor axes of ≾50 AU, binaries that might be called "close" in this context. As an alternative to in situ planet formation, a binary can acquire a giant planet when one
Muterspaugh, Matthew, Pfahl, Eric
core   +2 more sources

Impacts of Carbon Dioxide Deposition on Martian Near‐Surface Wave Activity

Geophysical Research Letters, Volume 53, Issue 7, 16 April 2026.
Abstract A prominent feature of Mars' winter atmosphere is near‐surface baroclinic wave activity. These waves exert strong control on dust storm variability and contribute to transport of heat, momentum, and dust. Using a suite of Mars general circulation model simulations, we investigate an underexplored connection between near‐surface wave activity ...
Hung Kwan Fok, Anthony Toigo, Darryn Waugh   +2 more
wiley   +1 more source

From Methane to Nanodiamond Precursors in Water: Superacid‐like Condensation Pathways Under Extreme Conditions

Angewandte Chemie, Volume 138, Issue 3, 16 January 2026.
Under extreme pressure and temperature, superionic water acts as a strong superacid, catalyzing methane polycondensation through pentacoordinated carbonium ions (CH5+). This discovery reveals the non‐classical carbocation chemistry underlying the early stages of diamond formation in water under extreme conditions.
Thomas Thévenet, Axel Dian, Matteo Cioni, Alexis Markovits, Sandro Scandolo, Arthur France‐Lanord, Flavio Siro Brigiano   +6 more
wiley   +2 more sources

The three-body problem

, 2014
The three-body problem, which describes three masses interacting through Newtonian gravity without any restrictions imposed on the initial positions and velocities of these masses, has attracted the attention of many scientists for more than 300 years ...
Musielak, Z. E., Quarles, B.
core   +1 more source

Deciphering the “Missing Xenon Paradox” in Celestial Bodies: A Multifaceted Perspective Toward Demystifying This Enigma

Journal of Geophysical Research: Planets, Volume 131, Issue 4, April 2026.
Abstract Xenon (Xe) is a heavy noble gas with intriguing chemical properties, such as having several stable isotopes and the ability to form compounds under extreme conditions. Despite the predictions based on cosmochemical models that suggest xenon should be relatively abundant in planetary reservoirs, empirical data indicate a significant depletion ...
Avinash Kumar Both, Avradip Ghosh, Chin Li Cheung   +2 more
wiley   +1 more source

Secular orbital dynamics of the innermost exoplanet of the $$\upsilon $$-Andromedæ system

Celestial Mechanics and Dynamical Astronomy, 2023
Abstract We 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 $$\upsilon $$
Mastroianni R., Locatelli U.
openaire   +3 more sources

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

Synergies between Asteroseismology and Exoplanetary Science

, 2017
Over the past decade asteroseismology has become a powerful method to systematically characterize host stars and dynamical architectures of exoplanet systems.
Huber, Daniel
core   +1 more source

Modeling Wind‐Driven Waves on Other Planets: Applications to Mars, Titan, and Exoplanets

Journal of Geophysical Research: Planets, Volume 131, Issue 4, April 2026.
Abstract Waves could exist on any planet with sustained winds and stable surface liquids. However, differences in atmospheres, liquids, and gravity confound efforts to extend Earth‐based empirical wave models to other planetary environments. We adapted a physics‐based numerical wave model to study how planetary conditions affect the growth of waves. We
Una G. Schneck, Charlene E. Detelich, Milan Curcic, Andrew D. Ashton, Alexander G. Hayes, J. Taylor Perron   +5 more
wiley   +1 more source

Statistical Distribution Function of Orbital Spacings in Planetary Systems

The Astronomical Journal
The minimum orbital separation of planets in long-stable planetary systems is often modeled as a step function, parameterized with a single value ${{\rm{\Delta }}}_{\min }$ (measured in mutual Hill radius of the two neighboring planets).
Jeremy Dietrich, Renu Malhotra, Dániel Apai   +2 more
doaj   +1 more source