PREDNASAJUCI / LECTURER :

David Vokrouhlický

(1) Astronomical Institute of Charles University, Prague, Czech Republic

NAZOV / TITLE :

Jupiter Trojans and Hildas: Population analysis and implications

ABSTRAKT / ABSTRACT :

Jupiter Trojans (JTs) librate about the Lagrangian stationary centers L4
and L5 associated with this planet on typically small-eccentricity and
moderate-inclination heliocentric orbits. Hildas (Hs), having similar
heliocentric orbits, occupy the long-term stable region of the 3/2 mean
motion resonance with Jupiter. Since both JTs and Hs are resonantly
coupled to Jupiter, their physical and orbital properties provide important
clues about the dynamical evolution of the giant planets in the early solar
system, as well as the population of planetesimals in the trans-Neptunian
region. Here we make use of a decade-long observations of the Catalina Sky
Survey to provide the state-of-art model of JTs and Hs orbital and magnitude
distribution. For both JTs and Hs we conduct an up-to-date search for
collisional families, allowing us to identify the background populations.
In spite of their many similarities, we also find evidence of several striking
differences. Future work is needed to understand whether they arise due to
(i) different formation processes of these populations, or (ii) rather a
divergent post-formation evolution.