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astro-ph.SR2025
von Zeipel-Kozai-Lidov oscillations in nearby bright stars. I. Lambda Ophiuchi
Idel Waisberg, Ygal Klein, Boaz Katz
The challenge of constraining both the inner and the outer orbits in multiple stars has resulted in a growing abyss between the rich theoretical and the sparse observational studie…
astro-ph.SR2025★ 2 cited
Which is the most eccentric binary known? Insights from the 2023/4 pericenter passages of Zeta Boötis and Eta Ophiuchi
Idel Waisberg, Ygal Klein, Boaz Katz
There is a clear dearth of very eccentric binaries among those for which individual eccentricities can be measured. In this paper we report on observations of the two nearby, brigh…
astro-ph.SR2025
Kozai Lidov Cycles = Simple Pendulum
Roi D. Basha, Ygal Y. Klein, Boaz Katz
The quadrupole Kozai mechanism, which describes the hierarchical three-body problem in the leading order, is shown to be equivalent to a simple pendulum where the change in the ecc…