TY - JOUR

T1 - Dynamical environments of (486958) Arrokoth: prior evolution and present state

AU - Shevchenko, Ivan I.

AU - Lages, José

AU - Vavilov, D. E.

AU - Rollin, Guillaume

PY - 2023/2/15

Y1 - 2023/2/15

N2 - We consider dynamical environments of (486958) Arrokoth, focusing on both their present state and their long-term evolution, starting from the KBO’s formation. Both analytical (based on an upgraded Kepler-map formalism) and numerical (based on massive simulations and construction of stability diagrams in the 3D setting of the problem) approaches to the problem are used. The debris removal is due to either absorption by the KBO or by leaving the Hill sphere; the interplay of these processes is considered. The clearing mechanisms are explored, and the debris removal time-scales are estimated. We assess survival opportunities for any debris orbiting around Arrokoth. The generic chaotization of Arrokoth’s circumbinary debris disc’s inner zone and generic cloudization of the disc’s periphery, which is shown to be essential in the general 3D case, naturally explains the current absence of any debris in its vicinities.

AB - We consider dynamical environments of (486958) Arrokoth, focusing on both their present state and their long-term evolution, starting from the KBO’s formation. Both analytical (based on an upgraded Kepler-map formalism) and numerical (based on massive simulations and construction of stability diagrams in the 3D setting of the problem) approaches to the problem are used. The debris removal is due to either absorption by the KBO or by leaving the Hill sphere; the interplay of these processes is considered. The clearing mechanisms are explored, and the debris removal time-scales are estimated. We assess survival opportunities for any debris orbiting around Arrokoth. The generic chaotization of Arrokoth’s circumbinary debris disc’s inner zone and generic cloudization of the disc’s periphery, which is shown to be essential in the general 3D case, naturally explains the current absence of any debris in its vicinities.

KW - methods: analytical

KW - methods: numerical

KW - celestial mechanics

KW - Kuiper belt: general

KW - Kuiper belt objects: individual: Arrokoth

UR - https://www.mendeley.com/catalogue/87b04f41-7257-3fbb-9f90-aa77757b42fc/

U2 - 10.1093/mnras/stad289

DO - 10.1093/mnras/stad289

M3 - Article

VL - 520

SP - 4324

EP - 4335

JO - Monthly Notices of the Royal Astronomical Society

JF - Monthly Notices of the Royal Astronomical Society

SN - 0035-8711

IS - 3

ER -