TY - JOUR
AU - Alexander Zderic
AU - Ann-Marie Madigan
AB - Axisymmetric disks of high eccentricity, low mass bodies on near-Keplerian orbits are unstable to an out-of-plane buckling. This "inclination instability" exponentially grows the orbital inclinations, raises perihelia distances and clusters in argument of perihelion. Here we examine the instability in a massive primordial scattered disk including the orbit-averaged gravitational influence of the giant planets. We show that differential apsidal precession induced by the giant planets will suppress the inclination instability unless the primordial mass is ≳20 Earth masses. We also show that the instability should produce a "perihelion gap" at semi-major axes of hundreds of AU, as the orbits of the remnant population are more likely to have extremely large perihelion distances ((100 AU)) than intermediate values.
BT - The Astrophysical Journal
DA - 2020-07
DO - 10.3847/1538-3881/ab962f
IS - 1
N2 - Axisymmetric disks of high eccentricity, low mass bodies on near-Keplerian orbits are unstable to an out-of-plane buckling. This "inclination instability" exponentially grows the orbital inclinations, raises perihelia distances and clusters in argument of perihelion. Here we examine the instability in a massive primordial scattered disk including the orbit-averaged gravitational influence of the giant planets. We show that differential apsidal precession induced by the giant planets will suppress the inclination instability unless the primordial mass is ≳20 Earth masses. We also show that the instability should produce a "perihelion gap" at semi-major axes of hundreds of AU, as the orbits of the remnant population are more likely to have extremely large perihelion distances ((100 AU)) than intermediate values.
PY - 2020
EP - 50
T2 - The Astrophysical Journal
TI - Giant-planet Influence on the Collective Gravity of a Primordial Scattered Disk
UR - https://iopscience.iop.org/article/10.3847/1538-3881/ab962f
VL - 160
ER -