Astronomy and Astrophysics – Astronomy
Scientific paper
May 2000
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000dda....31.0112n&link_type=abstract
American Astronomical Society, DDA Meeting #31, #01.12; Bulletin of the American Astronomical Society, Vol. 32, p.858
Astronomy and Astrophysics
Astronomy
Scientific paper
We have investigated excitations of orbital eccentricity and inclination of Kuiper Belt objects (KBOs) caused by the sweeping secular resonances during the primitive solar nebula depletion. Root mean square of the inclination and eccentricity are about 0.23 (radian) and 0.1 in the outer (classical) Kuiper Belt (the region beyond 42 AU). These large values are not explained by present planetary perturbations alone. Although many studies were done to explain the origin of these large values, the origin of the large inclination is not well known yet. We consider the sweeping secular resonances as the excitation mechanism. Four Jovian planets in the present configuration, seven secular resonances exist beyond the location of Neptune. When the solar nebula existed, the nebula potential would have significantly altered locations of the secular resonances. As the nebula was depleted, the secular resonances moved from their initial locations to the present ones, pumping up the eccentricity and the inclination of field bodies. We have investigated the effects of the sweeping secular resonances in KBOs with both direct orbital integration and analytical method, following Nagasawa et al. (2000, AJ, in press), which studied the sweeping secular resonances in the asteroid belt. For the initial nebula model, we basically employed the minimum mass solar nebula model extending to 150AU. We found that the inclination of the bodies in the outer belt is excited to the observational level if the nebula density uniformly decreases from 1/5 to 1/1000 of the initial nebula in a timescale of 108-10^9 years. The inclination of KBO is more excited easier than the eccentricity, which is consistent with observed orbital elements in the outer belt. This is because the resonances to pump up inclination migrate slower than the eccentricity's resonances do in the outer belt.
Ida Shigeru
Nagasawa Michiyasu
No associations
LandOfFree
Orbital evolution of KBOs due to the sweeping secular resonances 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 Orbital evolution of KBOs due to the sweeping secular resonances, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Orbital evolution of KBOs due to the sweeping secular resonances will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1128663