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Communication Dans Un Congrès Année : 2016

C-complex asteroids: Two main compositional families?

Résumé

An important goal of asteroid science is to link extraterrestrial materials (meteorites, IDPs) to their parent bodies in order to constrain their formation and evolution. To accomplish this task, we need to combine data from several different disciplines: ground based spectroscopic observations, laboratory studies (petrology, mineralogy), and thermal modeling. Here we report the result of a large observing campaign aimed at investigating the surface composition of the most massive C-complex Main Belt Asteroids (MBAs). We observed more than 100 of these C-types with SpeX/IRTF in the near-infrared thus complementing the existing visible part of the spectrum. We also analyzed their spectral properties in the mid-infrared, when available. We will show that by comparing the mineralogical composition of these C-type asteroids with the composition of CC meteorites and IDPs we are able to identify two main compositional families among C-types (CM-like and IDP-like). A further comparison with thermal evolution models supports the idea that these two populations likely formed in two different environments.
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Dates et versions

hal-03735271 , version 1 (21-07-2022)

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Pierre Vernazza, Michael Marsset, P. Beck, Richard P. Binzel, Francesca E. Demeo, et al.. C-complex asteroids: Two main compositional families?. AAS/Division for Planetary Sciences Meeting #48, Oct 2016, Pasadena, CA, United States. ⟨hal-03735271⟩
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