Stefano Rubino
A5039858601- Astro and Planetary Science
- Planetary Science and Exploration
- Geological and Geochemical Analysis
- High-pressure geophysics and materials
- Isotope Analysis in Ecology
- Space Exploration and Technology
- Hydrocarbon exploration and reservoir analysis
- Inorganic Chemistry and Materials
- Intermetallics and Advanced Alloy Properties
- Laser-induced spectroscopy and plasma
- Nuclear Physics and Applications
- Methane Hydrates and Related Phenomena
- Geology and Paleoclimatology Research
- MXene and MAX Phase Materials
- Fermentation and Sensory Analysis
- Geochemistry and Geologic Mapping
- Space Science and Extraterrestrial Life
- Astrophysics and Star Formation Studies
- Protist diversity and phylogeny
- Paleontology and Stratigraphy of Fossils
- CO2 Sequestration and Geologic Interactions
- Thermal Expansion and Ionic Conductivity
Institut d'Astrophysique Spatiale
2018-2024
Université Paris-Saclay
2018-2024
Centre National de la Recherche Scientifique
2018-2024
Institute for Space Astrophysics and Planetology
2024
Synchrotron soleil
2020
Industriale Chimica (Italy)
2004
Samples of the carbonaceous asteroid Ryugu were brought to Earth by Hayabusa2 spacecraft. We analyzed 17 samples measuring 1 8 millimeters. Carbon dioxide-bearing water inclusions are present within a pyrrhotite crystal, indicating that Ryugu's parent formed in outer Solar System. The contain low abundances materials at high temperatures, such as chondrules and calcium- aluminum-rich inclusions. rich phyllosilicates carbonates, which through aqueous alteration reactions temperature, pH,...
Introduction. Hydrated salts such as magnesium sulfates are expected to be found at the surface of Europa [1], possibly originating from hydrothermal activity in moon’s subsurface ocean. To support identification these compounds remote-sensing instruments data icy moons, MAJIS [2,3] onboard ESA JUICE mission [4], it is paramount importance investigate spectral response across different experimental conditions [5]. Here, we focus on changes hexahydrite (MgSO4 · 6H2O) upon...
Abstract Returned samples from Cb-type asteroid (162173) Ryugu exhibit very dark spectra in visible and near-infrared ranges, generally consistent with the Hayabusa2 observations. A critical difference is that a structural water absorption of hydrous silicates around twice as deep returned compared those Ryugu’s surface, suggesting surface more dehydrated. Here we use laboratory experiments data to indicate spectral differences between are best explained if has (1) higher porosity, (2)...
Abstract We report μm‐scale nondestructive infrared (IR) hyperspectral results (IR computed tomography, IR‐CT) in 3‐D and IR surface imaging, IR‐S) 2‐D, at SOLEIL) combined with X‐ray nano‐computed tomography analyses (at SPring‐8) performed on eight small Ryugu fragments extracted from mm‐sized grains coming both touchdown first second sites. describe the multiscale assembly of phyllosilicates, carbonates, sulfides, oxides, organics. Two types silicates, as well diverse kinds organic...
Samples collected from the surface/subsurface of C-type asteroid 162,173 Ryugu by Hayabusa2 mission were nondestructively analyzed in three dimensions (3D). Seventy-three small particles (approximately 10–180 µm size) observed using X-ray nanotomography, with an effective spatial resolution approximately 200 nm. Detailed descriptions these samples terms mineralogy, petrology, and variations among reported. The 57 most common consisted a phyllosilicate matrix containing mineral grains, mainly...
Abstract Near-infrared (NIR) spectrometers on board current sample return missions Hayabusa2 and the Origins-Spectral Interpretation-Resource Identification-Security-Regolith Explorer (OSIRIS-REx) from primitive bodies detected presence of hydrated silicates surface asteroids Ryugu Bennu, respectively. These detections relied upon study 2.7 μ m OH-stretching spectral feature, whose peak position is related to composition structure minerals. However, space weathering might alter band profile,...
Abstract In this paper, we report the results of a campaign measurements on four fragments CM Aguas Zarcas (AZ) meteorite, combining X‐ray computed tomography analysis and Fourier‐transform infrared (FT‐IR) spectroscopy. We estimated petrologic type for our sampled lithology using two independent techniques, obtained CM2.5, in agreement with previous estimations. By comparing Si‐O 10‐µm signature AZ average FT‐IR spectra other well‐studied CMs, place context aqueous alteration parent bodies....
Abstract Ryugu is a second-generation C-type asteroid formed by the reassembly of fragments previous larger body in main belt. While majority samples returned Hayabusa2 are composed lithology dominated aqueously altered minerals, clasts pristine olivine and pyroxene remain least-altered lithologies. These objects great interest for revealing composition dust from which original building blocks Ryugu's parent formed. Here we show that some grains rich olivine, pyroxene, amorphous silicates...
Abstract In the near future, a new generation of sample return missions (Hayabusa2, OSIRIS‐REx, MMX, etc.) will collect samples from small solar system bodies. To maximize scientific outcome laboratory studies and minimize loss precious extraterrestrial samples, an analytical sequence less destructive to more techniques needs be established. this work, we present combined X‐ray IR microtomography applied five Itokawa particles one fragment primitive carbonaceous chondrite Paris. We show that...
In order to better constrain the alteration history of Ryugu parent body, we performed a multi-analytical study combining scanning electron microscopy, transmission microscopy and infrared spectroscopy on sections extracted from three fragments A0064-FO019, A0064-FO021 C0002-FO019 returned by Hayabusa2 space mission. The show large differences in terms structure, mineralogy signature. Section A0064-FO019 resembles major lithology with presence both fine-grained phyllosilicates (fg-phyllos)...
Abstract Sample-return missions allow the study of materials collected directly from celestial bodies, unbiased by atmospheric entry effects and/or terrestrial alteration and contamination phenomena, using state-of-the-art techniques which are available only in a laboratory environment—but if material stays pristine. The scarcity outer-space unaltered recovered until now makes this extremely precious for potential scientific insight it can bring. To maximize output current future...
Abstract With the recent and ongoing sample return missions and/or developments of nano‐ to microscale 3‐D 2‐D analytical techniques, it is necessary develop preparation analysis protocols that allow combination different nanometer‐ micrometer‐scale resolution techniques both maximize scientific outcome minimize loss contamination. Here, we present novel procedures extract a maximum submicrometer structural, mineralogical, chemical, molecular, isotopic information from micrometric...
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Abstract Understanding the processes of aqueous alteration within primitive bodies is crucial for unraveling complex history early planetesimals. To better identify signs this process and its consequences, we have studied heterogeneity at a micrometric scale structure aliphatic organic compounds relationship to mineralogical environment. Here, report an analysis performed on two grains Ryugu (C0002‐FC027 C0002‐FC028). The samples were crushed in diamond compression cell analyzed using...
The study of small bodies in our solar system is fundamental for understanding its youth and evolution. These "primitive" are "undifferentiated" (their components did not separate according to their density, irreversibly altering mineralogy). They have evolved very little since birth, spurring a composition relatively close that the primordial proto-planetary disk (Scott et al. 2018). However, other processes such as thermal alteration, aqueous shocks, or space weathering can affect these...
. IntroductionThe Hayabusa2/JAXA spacecraft has orbited and studied near-Earth object Ryugu [1]. Two sample collections have been performed the is currently on its way back to Earth for an expected return in late 2020. A preliminary examination phase will follow [2], elucidate formation evolution of Ryugu. Considering limited amount material that be retrieved, a multi-analytical sequence needed maximize scientific outcome minimize loss. Among possible laboratory techniques, IR spectroscopy...