Orateur
Description
Primitive asteroids are remnants of the early stage of the Solar System evolution and may have preserved the mineralogical and molecular phases formed during this period.
In 2020, the Hayabusa2 mission of JAXA brought back to Earth, samples from the C-type asteroid Ryugu, a primitive near-Earth object, collected at two different locations and depths. The samples are now preserved and submitted to a first round of analyses at the ISAS Curation center (Sagamihara, Japan) under an ultraclean nitrogen purged chamber to prevent H2O/CO2 contamination. In particular, the MicrOmega instrument, a NIR hyperspectral microscope conceived at IAS, contributes to the characterization of the returned samples (e.g. Pilorget et al. 2022). Recently, the NASA mission OSIRIS-REx also brought back samples from the near-Earth primitive asteroid Bennu (Lauretta et al. 2022). A fraction of these samples will be transferred to ISAS in a Curation Facility similar to that of Ryugu samples, allowing us to characterize, with MicrOmega, the mineralogical and molecular composition of the grains in the same conditions as for Ryugu samples. The comparison between these two asteroids samples using the same instrument under the sames measurements conditions will allow us to better constrain the genericity or specificity of the processes identified.
Day constraints
not Wednesday 28 morning
| Astrophysics Field | Planetology (including small bodies and exoplanets) |
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