TY - JOUR
AU - Alexander Zderic
AU - Maria Tiongco
AU - Angela Collier
AU - Heather Wernke
AU - Aleksey Generozov
AU - Ann-Marie Madigan
AB - Axisymmetric disks of eccentric orbits in near-Keplerian potentials are unstable to an out-of-plane buckling. Recently, Zderic et al. (2020) showed that an idealized disk saturates to a lopsided mode. Here we show that this apsidal clustering also occurs in a primordial scattered disk in the outer solar system which includes the orbit-averaged gravitational influence of the giant planets. We explain the dynamics using Lynden-Bell (1979)'s mechanism for bar formation in galaxies. We also show surface density and line of sight velocity plots at different times during the instability, highlighting the formation of concentric circles and spiral arms in velocity space.
BT - The Astronomical Journal
DA - 2021-12
DO - 10.3847/1538-3881/ac2def
IS - 6
N2 - Axisymmetric disks of eccentric orbits in near-Keplerian potentials are unstable to an out-of-plane buckling. Recently, Zderic et al. (2020) showed that an idealized disk saturates to a lopsided mode. Here we show that this apsidal clustering also occurs in a primordial scattered disk in the outer solar system which includes the orbit-averaged gravitational influence of the giant planets. We explain the dynamics using Lynden-Bell (1979)'s mechanism for bar formation in galaxies. We also show surface density and line of sight velocity plots at different times during the instability, highlighting the formation of concentric circles and spiral arms in velocity space.
PY - 2021
EP - 278
T2 - The Astronomical Journal
TI - A Lopsided Outer Solar System
UR - https://iopscience.iop.org/article/10.3847/1538-3881/ac2def
VL - 162
ER -