Comets and Asteroids

An Estimate Of Resident Time Of The Oort Cloud New Comets In Planetary Region

By Keith Cowing
Status Report
astro-ph.EP
January 26, 2025
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An Estimate Of Resident Time Of The Oort Cloud New Comets In Planetary Region
Dependence of the frequency distribution of qmin on the initial orbital elements a0, e0, and I0 during A-early and A-late. The color charts indicate the number of objects in the logarithmic scale. — astro-ph.EP

We describe the result of our numerical orbit simulation which traces dynamical evolution of new comets coming from the Oort Cloud. We combine two dynamical models for this purpose.

The first one is semi-analytic, and it models an evolving comet cloud under galactic tide and encounters with nearby stars. The second one numerically deals with planetary perturbation in the planetary region.

Although our study does not include physical effects such as fading or disintegration of comets, we found that typical dynamical resident time of the comets in the planetary region is about 108 years. We also found that the so-called planet barrier works when the initial orbital inclination of the comets is small.

A numerical result concerning the temporary transition of the comets into other small body populations such as transneptunian objects or Centaurs is discussed.

Takashi Ito, Arika Higuchi

Comments: 174 pages, 64 figures, 5 tables. Accepted for publication in Planetary and Space Science. This manuscript is the third submitted version
Subjects: Earth and Planetary Astrophysics (astro-ph.EP)
Cite as: arXiv:2412.20507 [astro-ph.EP] (or arXiv:2412.20507v1 [astro-ph.EP] for this version)
https://doi.org/10.48550/arXiv.2412.20507
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Journal reference: Planetary and Space Science, 253, 105984, 2024
Related DOI:
https://doi.org/10.1016/j.pss.2024.105984
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Submission history
From: Takashi Ito
[v1] Sun, 29 Dec 2024 15:53:13 UTC (25,595 KB)
https://arxiv.org/abs/2412.20507
Astrobiology

Explorers Club Fellow, ex-NASA Space Station Payload manager/space biologist, Away Teams, Journalist, Lapsed climber, Synaesthete, Na’Vi-Jedi-Freman-Buddhist-mix, ASL, Devon Island and Everest Base Camp veteran, (he/him) 🖖🏻