@article{c9e1309ef5df4d6b850324edd5913622,
title = "Characterizing irradiated surfaces using IR spectroscopy",
abstract = "Solar wind ion irradiation continuously modifies the optical properties of unprotected surfaces of airless bodies in the Solar System. This alteration induces significant biases in the interpretation of the spectral data obtained through remote sensing, and it impedes a correct estimation of the composition of the sub-surface pristine materials. However, as the alteration of the surface is a function of time, an in-depth understanding of the phenomenon may provide an original way to estimate the weathering age of a surface. Laboratory experiments show that mid- and far-IR bands are very sensitive to space weathering, as they are significantly modified upon irradiation. These bands can thus constitute a reliable proxy of the time-bound effects of irradiation on an object. We show that the detection of irradiation effects is within the reach of IR spectral resolution of the OSIRIS-REx mission and of the future James Webb Space Telescope. Our results provide a possible evidence for space weathering effects in the IR spectrum of asteroid 101955 Bennu measured by OTES/OSIRIS-REx.",
keywords = "Asteroids, surfaces, Experimental techniques, Infrared, Meteorites, Observations, Solar wind",
author = "R. Brunetto and C. Lantz and T. Nakamura and D. Baklouti and {Le Pivert-Jolivet}, T. and S. Kobayashi and F. Borondics",
note = "Funding Information: The meteorite samples were kindly provided by the Natural History Museum of Vienna, the Vatican Observatory, J. Brucato, D. Cruikshank, and L. Folco. We are grateful to F. Capitani, A. Celeste, and C. Sandt for their precious help with the bolometer measurements at SOLEIL, and to P. Boiardi for useful suggestions on the manuscript. We warmly thank R.D. Hanna and M.S. Thompson for constructive reviews and discussions. PCA analysis was performed in Quasar ( https://quasar.codes ) using the Orange Spectroscopy toolbox ( Toplak et al., 2017 ). The irradiations were performed using the INGMAR setup, a joint IAS-CSNSM (Orsay, France) facility funded by the P2IO LabEx (ANR-10-LABX-0038) in the framework Investissements d'Avenir (ANR-11-IDEX-0003-01). The MIR micro-spectroscopy measurements were supported by grants from Region Ile-de-France (DIM-ACAV) and SOLEIL. We thank J.P. Bibring for supporting the FIR spectroscopic activities at SOLEIL. This work has been funded by the Centre National d'Etudes Spatiales (CNES-France, Hayabusa2 mission and OSIRIS-REx mission) and by the ANR project CLASSY (Grant ANR-17-CE31-0004-02 ) of the French Agence Nationale de la Recherche. Funding Information: The meteorite samples were kindly provided by the Natural History Museum of Vienna, the Vatican Observatory, J. Brucato, D. Cruikshank, and L. Folco. We are grateful to F. Capitani, A. Celeste, and C. Sandt for their precious help with the bolometer measurements at SOLEIL, and to P. Boiardi for useful suggestions on the manuscript. We warmly thank R.D. Hanna and M.S. Thompson for constructive reviews and discussions. PCA analysis was performed in Quasar (https://quasar.codes) using the Orange Spectroscopy toolbox (Toplak et al. 2017). The irradiations were performed using the INGMAR setup, a joint IAS-CSNSM (Orsay, France) facility funded by the P2IO LabEx (ANR-10-LABX-0038) in the framework Investissements d'Avenir (ANR-11-IDEX-0003-01). The MIR micro-spectroscopy measurements were supported by grants from Region Ile-de-France (DIM-ACAV) and SOLEIL. We thank J.P. Bibring for supporting the FIR spectroscopic activities at SOLEIL. This work has been funded by the Centre National d'Etudes Spatiales (CNES-France, Hayabusa2 mission and OSIRIS-REx mission) and by the ANR project CLASSY (Grant ANR-17-CE31-0004-02) of the French Agence Nationale de la Recherche. Publisher Copyright: {\textcopyright} 2020 Elsevier Inc.",
year = "2020",
month = jul,
day = "15",
doi = "10.1016/j.icarus.2020.113722",
language = "English",
volume = "345",
journal = "Icarus",
issn = "0019-1035",
publisher = "Academic Press Inc.",
}