Astronomy and Astrophysics – Astrophysics – Earth and Planetary Astrophysics
Scientific paper
2011-04-26
Astronomy and Astrophysics
Astrophysics
Earth and Planetary Astrophysics
36 pages, 13 figures, 2 tables, accepted for publication in ApJ
Scientific paper
We investigate the long-term evolution of the inclinations of the known classical and resonant Kuiper belt objects (KBOs). This is partially motivated by the observed bimodal inclination distribution and by the putative physical differences between the low- and high-inclination populations. We find that some classical KBOs undergo large changes in inclination over gigayear timescales, which means that a current member of the low-inclination population may have been in the high-inclination population in the past, and vice versa. The dynamical mechanisms responsible for the time-variability of inclinations are predominantly distant encounters with Neptune and chaotic diffusion near the boundaries of mean motion resonances. We reassess the correlations between inclination and physical properties including inclination time-variability. We find that the size-inclination and color-inclination correlations are less statistically significant than previously reported (mostly due to the increased size of the data set since previous works with some contribution from inclination variability). The time-variability of inclinations does not change the previous finding that binary classical KBOs have lower inclinations than non-binary objects. Our study of resonant objects in the classical Kuiper belt region includes objects in the 3:2, 7:4, 2:1, and eight higher-order mean motion resonances. We find that these objects (some of which were previously classified as non-resonant) undergo larger changes in inclination compared to the non-resonant population, indicating that their current inclinations are not generally representative of their original inclinations. They are also less stable on gigayear timescales.
Malhotra Renu
Volk Kathryn
No associations
LandOfFree
Inclination Mixing in the Classical Kuiper Belt does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Inclination Mixing in the Classical Kuiper Belt, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Inclination Mixing in the Classical Kuiper Belt will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-296728