Astrometric Orbits for Hipparcos Stochastic Binaries
Alexey Goldin, Valery Makarov
TL;DR
This paper improves orbital solutions for 81 Hipparcos stars with previous stochastic results using an advanced genetic algorithm, revealing new insights into binary star systems including nearby and astrophysically interesting objects.
Contribution
It introduces an improved genetic optimization algorithm for fitting unconstrained Kepler orbits to astrometric data, enabling solutions for previously unresolved stochastic binaries.
Findings
Orbital solutions obtained for 81 stars with stochastic solutions.
Identification of interesting binary systems like HIP 754, HIP 34922, and HIP 5496.
Enhanced understanding of binary star characteristics in the Hipparcos catalog.
Abstract
Taking advantage of an improved genetic optimization algorithm for fitting unconstrained Kepler orbits to the Hipparcos intermediate astrometric data, we obtain additional orbital solutions for 81 Hipparcos stars with previous stochastic (failed) solutions. The sample includes astrophysically interesting objects, including the old disk wide binary HIP 754, the nearby AGB star HIP 34922 (L2 Pup), and the nearby M2 dwarf HIP 5496 (GJ 54, at 8 pc from the Sun) which has a resolved M dwarf companion.
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