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20242026
most citedGravitational-Wave Signatures of Highly Eccentric Stellar-Mass Binary Black Holes in Galactic Nuclei

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astro-ph.EP2026

Extensions of Brown Hamiltonian-III. Applications to irregular satellites of giant planets

Hanlun Lei, Xiaoyan Leng, Evgeni Grishin

Irregular satellites, orbiting at large distances from their host planets, are subject to strong solar perturbations that render long-term orbital predictions particularly challeng…

astro-ph.EP2026

Sub-Snowline Formation of Gas-Giant Planets in Binary Systems

Ilay Kamai, Hagai B. Perets, Jakob Stegmann +1

Gas-giant planets are thought to require conditions beyond the water snow line to build solid cores efficiently. In close binary star systems, the companion's gravity additionally…

astro-ph.EP2025

Hot Jupiters in Old Wide-Binary Systems

Evgeni Grishin, Jet Winter, Jaime A. Alvarado-Montes

Hot Jupiters (HJs) are giant planets with orbital periods shorter than days, found around - of Sun-like stars. Their origins remain debated despite decades of s…

astro-ph.EP2025

Extensions of Brown Hamiltonian-II. Analytical study on the modified von Zeipel-Lidov-Kozai effects

Hanlun Lei, Evgeni Grishin

In triple systems of weak hierarchies, nonlinear perturbations arising from the periodic oscillations associated with the inner and outer binaries play a crucial role in shaping th…

astro-ph.EP2025

Extensions of Brown Hamiltonian-I. A high-accuracy model for von Zeipel-Lidov-Kozai oscillations

Hanlun Lei, Evgeni Grishin

Triple systems with low hierarchical structure are common throughout the Universe, including examples such as high-altitude lunar satellites influenced by the Earth, planetary sate…

astro-ph.EP2025

Planet formation and long-term stability in a very eccentric stellar binary

Jakob Stegmann, Evgeni Grishin, Cole Johnston +4

Planets orbiting one of the two stars in a binary are vulnerable to gravitational perturbations from the other star. Particularly, highly eccentric companion stars risk disrupting…