Colors and Taxonomy of Tnos and Centaurs

Details Colors and Taxonomy of Tnos and Centaurs Colors and Taxonomy of Tnos and Centaurs

Sep 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009dps....41.6510p&link_type=abstract

American Astronomical Society, DPS meeting #41, #65.10

Astronomy and Astrophysics

Astronomy

Scientific paper

The investigation of the surface properties of the minor bodies of the outer Solar System constitutes a major topic in modern planetary science, since they
represent the "vestiges" of the leftover planetesimals from the early accretional phases of the outer pre-planetary disk.
Because of the faintness of Trans-Neptunian Objects (TNOs) and Centaurs, spectroscopic observations are feasible only for a small number of them. Hence photometry is still the best tool to investigate the surface properties of a significant sample of these objects, retrieving a global view of the whole
known population.
Here we present new visible and near-infrared photometric observations of 31 objects, executed at the Very Large Telescope of the European Southern Observatory (ESO) between November 2007 and November 2008, in the framework of a second ESO Large Programme devoted to the study of TNOs and Centaurs by means of different techniques (PI: M. A. Barucci).
The taxonomic classification of the targets was derived via the G-mode statistical method presented in Fulchignoni et al. 2000 (Icarus, 146, 204) using the Barucci taxonomy for TNOs and Centaurs (Barucci et al. 2005, AJ, 130, 1291), which identifies four classes (with increasingly red colors: BB, BR, IR, RR) that reasonably indicate different composition and/or evolutional history. A comparison with literature data, whenever available, was performed. The obtained complete results will be presented and discussed.

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