Taxonomy of asteroid spectra using density-based clustering methods in the Gaia era

Laurent Galluccio (1) , Marco Delbo' (1) , Alberto Cellino (2) , Paolo Tanga (1) , Francesca de Angeli (3)

1 LAGRANGE - Joseph Louis LAGRANGE
2 OATo - INAF - Osservatorio Astrofisico di Torino
3 Institute of Astronomy [Cambridge]

In 2021, the Gaia mission will release its third data set of measurements including for the first time thousands of reflectance spectra of asteroids. For the final release of Gaia, this number is expected to increase to 100 000. The reflectance spectra are derived from spectro-photometric detectors covering wavelengths from blue to red (from 325 to 1100 nm). The official full Gaia Taxonomy of asteroids will be delivered during the final data release. In this presentation, we will describe the density-based clustering methods used for deriving this taxonomy but also other modern approaches that could be considered in the future.

Domaines: Traitement du signal et de l'image [eess.SP]; Machine Learning [stat.ML]; Astrophysique [astro-ph]

Laurent Galluccio, Marco Delbo', Alberto Cellino, Paolo Tanga, Francesca de Angeli. Taxonomy of asteroid spectra using density-based clustering methods in the Gaia era. EPSC-DPS, Sep 2019, Genève, Switzerland. ⟨hal-02958070⟩