Astrocladistics of the Jovian Trojan Swarms
arXiv:2103.10967 · doi:10.1093/mnras/stab894
Abstract
The Jovian Trojans are two swarms of small objects that share Jupiter's orbit, clustered around the leading and trailing Lagrange points, L and L. In this work, we investigate the Jovian Trojan population using the technique of astrocladistics, an adaptation of the `tree of life' approach used in biology. We combine colour data from WISE, SDSS, Gaia DR2 and MOVIS surveys with knowledge of the physical and orbital characteristics of the Trojans, to generate a classification tree composed of clans with distinctive characteristics. We identify 48 clans, indicating groups of objects that possibly share a common origin. Amongst these are several that contain members of the known collisional families, though our work identifies subtleties in that classification that bear future investigation. Our clans are often broken into subclans, and most can be grouped into 10 superclans, reflecting the hierarchical nature of the population. Outcomes from this project include the identification of several high priority objects for additional observations and as well as providing context for the objects to be visited by the forthcoming \textit{Lucy} mission. Our results demonstrate the ability of astrocladistics to classify multiple large and heterogeneous composite survey datasets into groupings useful for studies of the origins and evolution of our Solar system.
Accepted for publication in MNRAS
References in corpus (28)
- Solar System evolution from compositional mapping of the asteroid belt
- The Visible and Infrared Survey Telescope for Astronomy (VISTA): Design, Technical Overview and Performance
- The Size Distributions of Asteroid Families in the SDSS Moving Object Catalog 4
- Visible spectroscopic and photometric survey of Jupiter Trojans: final results on dynamical families
- The Properties of Jovian Trojan Asteroids Listed in SDSS Moving Object Catalog 3
- Asteroid pairs: a complex picture
- Constraining the giant planets' initial configuration from their evolution: implications for the timing of the planetary instability
- Taxonomy of asteroid families among the Jupiter Trojans: Comparison between spectroscopic data and the Sloan Digital Sky Survey colors
- The consequences of planetary migration on the minor bodies of the early Solar System
- Binary Survival in the Outer Solar System
- Solar System Physics for Exoplanet Research
- Cosmic phylogeny: reconstructing the chemical history of the solar neighbourhood with an evolutionary tree
- Yarkovsky V-shape identification of asteroid families
- An automatic approach to exclude interlopers from asteroid families
- Structures in the fundamental plane of early-type galaxies
- A new perspective on the irregular satellites of Saturn - I Dynamical and collisional history
- Initial Characterization of Active Transitioning Centaur, P/2019 LD2 (ATLAS), using Hubble, Spitzer, ZTF, Keck, APO and GROWTH Visible & Infrared Imaging and Spectroscopy
- Hektor - an exceptional D-type family among Jovian Trojans
- Stability of Jovian Trojans and their collisional families
- Towards a Phylogenetic Analysis of Galaxy Evolution : a Case Study with the Dwarf Galaxies of the Local Group
- P/2019 LD2 (ATLAS): An Active Centaur in Imminent Transition to the Jupiter Family
- On the inclinations of the Jupiter Trojans
- The Transient Jupiter Trojan-Like Orbit of P/2019 LD2 (ATLAS)
- Initial velocity V-shapes of young asteroid families
- The color-magnitude distribution of Hilda asteroids: Comparison with Jupiter Trojans
- Efficiency characterization of the V-shape asteroid family detection method
- Rotationally-resolved spectroscopy of Jupiter Trojans (624) Hektor and (911) Agamemnon
- A pair of Jovian Trojans at the L4 Lagrange point