Visible and near-infrared reflectance of hyperfine and hyperporous particulate surfaces

Sultana, Robin; Poch, Olivier; Beck, Pierre; Schmitt, Bernard; Quirico, E.

doi:10.1016/j.icarus.2020.114141

Cited by 19 publications

(20 citation statements)

References 63 publications

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“…3b). This is consistent with the fact that reflectance increases and band depths become shallower with decreasing grain size (as shown for instance by Mustard andHays, 1997 andSultana et al, 2021 for pure olivine and pyroxene).…”

Section: Importance Of Consistent Measuring Conditionssupporting

confidence: 88%

Investigating S-type asteroid surfaces through reflectance spectra of ordinary chondrites

Eschrig

Bonal²,

Mahlke³

et al. 2022

Icarus

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Section: Importance Of Consistent Measuring Conditionssupporting

confidence: 88%

Investigating S-type asteroid surfaces through reflectance spectra of ordinary chondrites

Eschrig

Bonal²,

Mahlke³

et al. 2022

Icarus

Self Cite

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“…Our findings are in good agreement with Quirico et al (2016) and Sultana et al (2021) who showed that the darkest characteristics of some small bodies implies the presence of an absorbing constituent, like organic material, on their surface. We suggest here the presence of abundant polyaromatic organic matter.…”

Section: Organic Matter and The Reflectance Levelsupporting

confidence: 93%

Polyaromatic Units Set the Albedo of Dark Extraterrestrial Materials

Maupin¹,

Djouadi²,

Brunetto³

et al. 2022

Planet. Sci. J.

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Primitive extraterrestrial materials are generally dark, a characteristic often associated with the presence of polyaromatic organic material and/or sulfides. We show in this study that the reflectance level measured at 0.55 μm of IDPs and some meteorites is correlated to the degree of graphitization of the polyaromatic organic matter. The reflectance level of the primitive surfaces therefore allows us to obtain information on the polyaromatic organic material present on the surface of solar system small bodies observed by remote sensing or visited by space missions. We discuss our results in view of the sample return missions Hayabusa2 and OSIRIS-REx.

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“…For each end member, this process took roughly two hours. The size of the silicate grains was chosen to decrease the absorption band depth (Kiddell et al 2018;Sultana et al 2021) because we aim to produce a featureless spectrum, but also to be representative of a small body surface with regolith grain of about 80 µm (Kuehrt et al 1992;Giuranna et al 2011;Miyamoto et al 2021). Finally, a sequential dry sieving was applied to these grains -with 500, 250, and 125 µm sieves.…”

Section: The Preparation Of Samplesmentioning

confidence: 99%

Organic detection in the near-infrared spectral Phobos regolith laboratory analogue in preparation for the Martian Moon eXploration mission

Wargnier

Gautier

Poch

et al. 2023

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Context. The Martian Moon eXploration mission (MMX) of the Japanese space agency (JAXA) is scheduled to take off in September 2024 to explore Phobos and Deimos -the two martian moons -by in situ observations, but also by a sampling and returning regolith samples to Earth. The origins of Phobos and Deimos are still unknown and their understanding is one of the main goals of the MMX mission. In one scenario, Phobos could be a captured asteroid, as the Phobos spectrum is similar to dark D-type asteroids. Aims. For the present work, we considered the hypothesis of Phobos being a captured D-type asteroid, and we investigated the detectability of organics on Phobos using laboratory spectral analogues. Methods. We synthesised a near-infrared spectral analogue of Phobos composed of olivine (77 vol.%, 50-125 µm), hyperfine anthracite (20 vol.%, <1 µm), and organic tholins (3 vol.%, ∼ 400 nm) by measuring the reflectance spectrum from 0.4 to 4.75 µm with the SHADOWS spectrogonio-radiometre developped at IPAG. The best spectral match for a Phobos regolith analogue was chosen based on its reflectance level and spectral slope similarities to Phobos' observed spectrum. Several samples were then prepared by adding a different volume content of organic matter (Titan tholins). We monitored the 3 µm band attributed to N-H bands stretching modes absorption due to the amine function in the tholins, so as to assess the detectability of the NH-rich organics on Phobos. Results. We have demonstrated that the organic compounds become detectable for more than 5 vol.% in the mixture. We further studied the observation geometry effects on the absorption band depth and found no significant effect except at large phase angles (>80 • ). These results will be useful to interpret the data of the MMX Infrared Spectrometer (MIRS) onboard the MMX spacecraft, which will measure the spectral reflectance of Phobos from 0.9 to 3.6 µm.

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Visible and near-infrared reflectance of hyperfine and hyperporous particulate surfaces

Cited by 19 publications

References 63 publications

Investigating S-type asteroid surfaces through reflectance spectra of ordinary chondrites

Investigating S-type asteroid surfaces through reflectance spectra of ordinary chondrites

Polyaromatic Units Set the Albedo of Dark Extraterrestrial Materials

Organic detection in the near-infrared spectral Phobos regolith laboratory analogue in preparation for the Martian Moon eXploration mission

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