- Names
-
- C. Lantz
- T. Nakamura
- D. Baklouti
- R. Brunetto
- E. Henault
- S. Kobayashi
- O. Mivumbi
- Z. Djouadi
- E. Quirico
- M. Zolensky
- T. Hiroi
- Title
- Mid-InfraRed measurements of ion irradiated carbonaceous meteorites: How to better detect the space weathering effects?
- Abstract
- Remote sensing study of asteroids will enter soon a new era with an increasing amount of available data thanks to the JWST, especially in the Mid-Infrared (MIR) range that allows identification of mineral species. It will be then possible to establish a taxonomy, as it is currently available in the Visible-Near-Infrared range [DeMeo et al. 2009, Mahlke et al. 2022], based on MIR spectral parameters. It had been previously shown that the MIR range is very sensitive to space weathering (SpWe) effects [Lantz et al. 2017]. Thus, it is crucial to determine which spectral changes are involved to disentangle initial composition from surface aging and provide tools on how to interpret future remote sensing data of asteroids. We present here MIR measurements of a wide variety of ion irradiated carbonaceous chondrites as a simulation of solar wind SpWe component. We evaluate several parameters (Christiansen feature and Reststrahlen bands positions, width of the main Si-O band) and tested different measurements conditions (ion energy and geometry of observation). We highlight a dependency of the spectral changes with the initial composition, as hydrated samples are more affected than anhydrous ones. We confirm the role of the geometry in the detection of SpWe effects as already shown in the Near-Infrared [Rubino et al. 2022], with a competition effect between the depth probed by photons and implantation depth of ions (function of the energy used). We will discuss the results in the framework of future observations and Ryugu’s and Bennu’s samples study in the laboratory.
- Keywords
- spectroscopy, imaging spectroscopy, FTIR spectrometer, mid-IR
- Content
- planetary sciences, spectral data, spectral data use
- Year
- 2024
- Journal
- The Planetary Science Journal
- Volume
- 0
- Pages
- 1 - 35
- Document type
- article
- Publication state
- published
- Experiment/Spectra
-
- MIR spectrum of an unirradiated area of the QUE97990 meteorite pellet
- MIR spectrum of an unirradiated area of the EET92159 meteorite pellet
- MIR spectrum of an irradiated area of the EET92159 meteorite pellet at 40 keV
- MIR spectrum of an unirradiated area of the MET01070 meteorite pellet
- MIR spectrum of an irradiated area of the MET01070 meteorite pellet at 15 keV
- MIR spectrum of an irradiated area of the MET01070 meteorite pellet at 40 keV
- MIR spectrum of an unirradiated area of the NWA5515 meteorite pellet
- MIR spectrum of an irradiated area of the NWA5515 meteorite pellet at 15 keV
- MIR spectrum of an irradiated area of the NWA5515 meteorite pellet at 40 keV
- MIR spectrum of an unirradiated area of the MET00639 meteorite pellet
- MIR spectrum of an irradiated area of the MET00639 meteorite pellet at 20 keV
- MIR spectrum of an unirradiated area of the Y980115 meteorite pellet
- MIR spectrum of an irradiated area of the Y980115 meteorite pellet at 20 keV
- MIR spectrum of an irradiated area of the QUE97990 meteorite pellet at 40 keV
- MIR spectrum of an unirradiated area of the MET01072 meteorite chip
- MIR spectrum of an irradiated area of the MET01072 meteorite chip at 20 keV
- MIR spectrum of an unirradiated area of the Y980115 meteorite chip
- MIR spectrum of an irradiated area of the Y980115 meteorite chip at 20 keV
- MIR spectrum of an unirradiated area of the Almahata Sitta meteorite chip
- MIR spectrum of an irradiated area of the Almahata Sitta meteorite chip at 20 keV
- MIR spectrum of an unirradiated area of the Murchison meteorite chip
- MIR spectrum of an irradiated area of the Murchison meteorite chip at 4 keV
- MIR spectrum of an irradiated area of the Murchison meteorite chip at 20 keV