Free Inclinations for Trans-Neptunian Objects in the Main Kuiper Belt
Yukun 宇坤 Huang 黄 et al. (2022)
- Published
- Apr 1, 2022
- Journal
- The Astrophysical Journal Supplement Series · Vol. 259 · No. 2
- DOI
- 10.3847/1538-4365/ac559a
At a GlanceAI
Computes and releases well-conserved free inclinations for main-belt TNOs using a double-averaged secular model that fixes ν18 failures.
SummaryAI
This paper provides a community resource: a catalog of barycentric orbital elements and accurately computed free inclinations (Ifree) for trans-Neptunian objects in the main classical Kuiper Belt. It shows that the commonly used Laplace–Lagrange linear secular theory mis-estimates the local forced pole near the ν18 secular resonance, yielding Ifree values that are not conserved even on Myr timescales. The authors replace the linear precession-rate estimate with a semianalytical “double-averaged” Hamiltonian approach, producing Ifree that stays conserved to <1° over 4 Gyr for ~96% of nonresonant classical objects. The resulting Ifree distribution strengthens the picture of a very thin primordial cold component (cleanly isolated by Ifree<4°) plus a broad implanted hot component, and it improves how observers separate these populations for physical studies.
Method SnapshotAI
Semianalytical secular dynamics: compute each TNO’s forced pole from a double-averaged Hamiltonian precession rate, validated against long N-body integrations.
BackgroundAI
Basic celestial mechanics of secular theory, resonances, and Kuiper Belt dynamical classes (classical vs resonant vs scattering).
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— ES