A5079335002- Astro and Planetary Science
- Planetary Science and Exploration
- Isotope Analysis in Ecology
- Stellar, planetary, and galactic studies
- Astronomy and Astrophysical Research
- Atmospheric Ozone and Climate
- Nuclear Physics and Applications
- Solar and Space Plasma Dynamics
- Gamma-ray bursts and supernovae
- Geology and Paleoclimatology Research
- Geochemistry and Geologic Mapping
- Spacecraft and Cryogenic Technologies
- Astronomical Observations and Instrumentation
- Geological and Geochemical Analysis
- Astrophysics and Star Formation Studies
- Historical Astronomy and Related Studies
- Mass Spectrometry Techniques and Applications
- History and Developments in Astronomy
- Space Exploration and Technology
- Calibration and Measurement Techniques
- Scientific Research and Discoveries
- Atmospheric and Environmental Gas Dynamics
- Hydrocarbon exploration and reservoir analysis
- Radioactive Decay and Measurement Techniques
- Chemical Thermodynamics and Molecular Structure
Institute for Space Astrophysics and Planetology
2016-2025
National Institute for Astrophysics
2015-2024
Southwest Research Institute
2016
University of Tennessee at Knoxville
2016
Sapienza University of Rome
2011-2013
The VIRTIS (Visible, Infrared and Thermal Imaging Spectrometer) instrument on board the Rosetta spacecraft has provided evidence of carbon-bearing compounds nucleus comet 67P/Churyumov-Gerasimenko. very low reflectance (normal albedo 0.060 ± 0.003 at 0.55 micrometers), spectral slopes in visible infrared ranges (5 to 25 1.5 5% kÅ(-1)), broad absorption feature 2.9-to-3.6-micrometer range present across entire illuminated surface are compatible with opaque minerals associated nonvolatile...
INTRODUCTION The surface of the dwarf planet Ceres is known to host phyllosilicate minerals, but their distribution and origin have not previously been determined. Phyllosilicates are hydrated silicates, presence on intriguing given that structure evolves through an aqueous alteration process. In addition, some phyllosilicates bear NH 4 , which places a constraint pH redox conditions during evolution Ceres. We studied across planet’s better understand evolutionary pathway RATIONALE Using...
Organic compounds detected on Ceres Water and organic molecules were delivered to the early Earth by impacts of comets asteroids. De Sanctis et al. examined infrared spectra taken Dawn spacecraft as it orbited Ceres, largest object in asteroid belt (see Perspective Küppers). In some small patches surface, they absorption bands characteristic aliphatic compounds. The authors ruled out an external origin, such impact, suggesting that material must have formed Ceres. Together with other...
The surface of dwarf planet Ceres contains hydroxyl-rich materials. Theories predict a water ice-rich mantle, and vapor emissions have been observed, yet no (H2O) has previously identified. Visible InfraRed (VIR) mapping spectrometer onboard the Dawn spacecraft now detected absorption features within low-illumination, highly reflective zone in Oxo, 10-kilometer, geologically fresh crater, on five occasions over period 1 month. Candidate materials are H2O ice mineral hydrates. Exposed would...
Different carbonates have been detected on Ceres, and their abundance spatial distribution mapped using a visible infrared mapping spectrometer (VIR), the Dawn imaging spectrometer. Carbonates are abundant ubiquitous across surface, but variations in strength position of spectral absorptions indicate composition amount these minerals. Mg-Ca all over localized areas show Na carbonates, such as natrite (Na2CO3) hydrated (for example, Na2CO3·H2O). Their geological settings accessory NH4-bearing...
Abstract The MAJIS (Moons And Jupiter Imaging Spectrometer) instrument on board the ESA JUICE (JUpiter ICy moon Explorer) mission is an imaging spectrometer operating in visible and near-infrared spectral range from 0.50 to 5.55 μm two channels with a boundary at 2.3 samplings for VISNIR IR better than 4 nm/band 7 nm/band, respectively. IFOV 150 μrad over total of 400 pixels. As already amply demonstrated by past present operative planetary space missions, this type can span wide scientific...
Aims. We investigate the nucleus photometric properties of comet 67P/Churyumov-Gerasimenko as observed by Visible and Infrared Thermal Imaging Spectrometer (VIRTIS) onboard Rosetta spacecraft. Both full-disk disk-resolved images have been analyzed, deriving light phase curves well a reduction radiance factor (I/F) to single scattering albedo (SSA) in 0.4–3.5 μm range.
Since the orbital insertion of Rosetta spacecraft, comet 67P/Churyumov-Gerasimenko (67P/C-G) has been mapped by OSIRIS camera and VIRTIS spectro-imager, producing a huge quantity images spectra comet's nucleus. The aim this work is to search for presence H$_2$O on nucleus which, in general, appears very dark rich dehydrated organic material. After selecting bright spots which could be good candidates ice, taken at high resolution OSIRIS, we check spectral cubes selected coordinates identify...
Rosetta observes sublimating surface ices Comets are “dirty snowballs” made of ice and dust, but they dark because the sublimates away, leaving some dust behind on surface. The spacecraft has provided a close-up view comet 67P/Churyumov-Gerasimenko as it passes through its closest point to Sun (see Perspective by Dello Russo). Filacchione et al. detected spectral signature solid CO 2 (dry ice) in small patches nucleus emerged from local winter. By modeling how sublimates, constrain...
Ammonium salts on comet 67P The distribution of carbon and nitrogen in the Solar System is thought to reflect stability carbon- nitrogen-bearing molecules when exposed heat forming Sun. Comets have a low nitrogen-to-carbon ratio, which contrary expectations because they originate outer where species should be common. Poch et al. used laboratory experiments simulate cometary surfaces compared resulting spectra with 67P/Churyumov-Gerasimenko. They assigned previously unidentified infrared...
Abstract Ahuna Mons is the highest mountain on Ceres. A unique complex in terms of size, shape, and morphology, bordered by flanks talus around its summit. Recent work Ruesch et al. ( ) based Dawn's Framing Camera images shed light possible origin Mons. According to (2016), formed a volcanic process involving ascent cryomagma extrusion onto surface followed dome development subsequent spreading. Here we analyzed detail composition Mons, using data acquired visible infrared spectrometer...