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Spectral properties of (854) Frostia, (1333) Cevenola and (3623) Chaplin

Domenii publicaţii > Ştiinţele pământului şi planetare + Tipuri publicaţii > Articol în revistã ştiinţificã

Autori: Birlan, M.; Nedelcu, D. A.; Descamps, P.; Berthier, J.; Marchis, F.; Merouane, S.; Popescu, M.

Editorial: Monthly Notices of the Royal Astronomical Society, 415, p.587-595, 2011.

Rezumat:

Near-infrared spectroscopy can play a key role in establishing the mineralogical composition of objects and supporting other physical data obtained by complementary observational techniques such as adaptive optics, radar and photometry. The objective of our survey was asteroids that present large variations in their light curves. We report observations for asteroids (854) Frostia, (1333) Cevenola and (3623) Chaplin carried out in the 0.8-2.5 μm spectral range using SpeX/Infrared Telescope Facility (IRTF) in LowRes mode. The spectral modelling of these asteroids gives new insights into these peculiar objects in the main belt. (854) Frostia is a V-type asteroid, and its spectral properties are similar to those of basalts. The most probable mineralogical solution Wo8Fs43En49 was calculated for Frostia. (1333) Cevenola was estimated to have an Sq spectral type, in agreement with its membership of the Eunomia family. (3623) Chaplin is an S-type asteroid, in agreement with the taxonomic type of the Koronis family.

Cuvinte cheie: techniques: spectroscopic, minor planets, asteroids: individual: (854) Frostia, minor planets, asteroids: individual: (1333) Cevenola, minor planets, asteroids: individual: (3623) Chaplin