المؤلفون: Valantinas, A.^{Aff1, Aff2, IDs41561024014577_cor1}, Thomas, N., Pommerol, A., Karatekin, O., Ruiz Lozano, L., Senel, C. B.^{Aff3, Aff4}, Temel, O.^{Aff3, Aff5}, Hauber, E., Tirsch, D., Bickel, V. T., Munaretto, G., Pajola, M., Oliva, F., Schmidt, F.^{Aff10, Aff11}, Thomas, I., McEwen, A. S., Almeida, M., Read, M., Rangarajan, V. G., El-Maarry, M. R., Re, C., Carrozzo, F. G., D’Aversa, E., Daerden, F., Ristic, B., Patel, M. R., Bellucci, G., Lopez-Moreno, J. J., Vandaele, A. C., Cremonese, G.

المصدر: Nature Geoscience. 17(7):608-616

المؤلفون: Ruiz Lozano, L., Oliva, F., Karatekin, Ö., Bellucci, G., Dehant, V., D'Aversa, E., Carrozzo, F.G., Schmidt, F., Cruz Mermy, G., Thomas, I.R., Vandaele, A.C., Daerden, F., Ristic, B., Patel, M.R., López-Moreno, J.-J.

المصدر: In Icarus 1 March 2024 410

المؤلفون: Gérard, Jean-Claude, Aoki, Shohei, Soret, Lauriane, Gkouvelis, Leonardos, Willame, Y., Thomas, Depiesse, Ristic, B., Vandaele, A.C., Daerden, Patel, M., Lopez-Moreno, J., Bellucci, G., Mason, J.

المساهمون: STAR - Space sciences, Technologies and Astrophysics Research - ULiège

المصدر: European Geophysical Union, Vienne, Austria [AT], April 2021

مصطلحات موضوعية: Mars, spectroscopy, dayglow, atmosphere, ultraviolet, visible, Trace Gas Orbiter, NOMAD, Physical, chemical, mathematical & earth Sciences, Space science, astronomy & astrophysics, Physique, chimie, mathématiques & sciences de la terre, Aérospatiale, astronomie & astrophysique

الوصف: The NOMAD instrument currently in orbit around Mars on board ESA's ExoMars Trace Gas Orbiter (TGO) includes UVIS, a UV-visible spectrograph covering the spectral range 200-700 nm. This instrument has two channels, one for solar occultation and a nadir channel essentially designed to analyse solar backscattered radiation. Since April 2019, the TGO spacecraft is occasionally tilted so that the nadir channel is pointed toward the Martian limb to observe the planetary airglow. A first success was the discovery of the forbidden oxygen green line at 557.7 nm that is ubiquitous in all UVIS limb dayside observations. This emission gives its characteristic colour to the terrestrial polar aurora but had was never been observed before in the airglow of other planetary atmospheres. This emission is excited by the interaction between solar radiation and CO2 and shows a mean intensity peak near 80 km. More recently, the much weaker OI 630-nm emission has been detected following co-addition of several hundreds of UVIS spectra. It is much weaker than the green line, as a consequence of collisional deactivation of the long-lived O(1D) excited state. Both oxygen dayglow emissions have been successfully modelled. Molecular transitions are also identified in the UVIS ultraviolet spectrum, including the CO Cameron bands, the CO2+ ultraviolet doublet at 298-299 nm and the Fox-Duffendack-Baker (FDB) bands. They originate from the lower thermosphere near 120 km.

URL الوصول: https://orbi.uliege.be/handle/2268/260485

المؤلفون: Raponi, A., Ciarniello, M., Capaccioni, F., Mennella, V., Filacchione, G., Vinogradoff, V., Poch, O., Beck, P., Quirico, E., De Sanctis, M. C., Moroz, L., Kappel, D., Erard, S., Bockelée-Morvan, D., Longobardo, A., Tosi, F., Palomba, E., Combe, J. -P., Rousseau, B., Arnold, G., Carlson, R. W., Pommerol, A., Pilorget, C., Fornasier, S., Bellucci, G., Barucci, A., Mancarella, F., Formisan, M., Rinaldi, G., Istiqomah, I., Leyrat, C.

مصطلحات موضوعية: Astrophysics - Earth and Planetary Astrophysics

الوصف: The ESA Rosetta mission has acquired unprecedented measurements of comet 67/P-Churyumov-Gerasimenko (hereafter 67P) nucleus surface, whose composition, as determined by in situ and remote sensing instruments including VIRTIS (Visible, InfraRed and Thermal Imaging Spectrometer) appears to be made by an assemblage of ices, minerals, and organic material. We performed a refined analysis of infrared observations of the nucleus of comet 67P carried out by the VIRTIS-M hyperspectral imager. We found that the overall shape of the 67P infrared spectrum is similar to that of other carbon-rich outer solar system objects suggesting a possible genetic link with them. More importantly, we are also able to confirm the complex spectral structure of the wide 2.8-3.6 micron absorption feature populated by fainter bands. Among these, we unambiguously identified the presence of aliphatic organics by their ubiquitous 3.38, 3.42 and 3.47 micron bands. This novel infrared detection of aliphatic species on a cometary surface has strong implications for the evolutionary history of the primordial solar system and give evidence that comets provide an evolutionary link between interstellar material and solar system bodies.

URL الوصول: http://arxiv.org/abs/2009.14476

المؤلفون: Bettanini, C., Esposito, F., Debei, S., Molfese, C., Colombatti, G., Aboudan, A., Brucato, J. R., Cortecchia, F., Di Achille, G., Guizzo, G. P., Friso, E., Ferri, F., Marty, L., Mennella, V., Molinaro, R., Schipani, P., Silvestro, S., Mugnuolo, R., Pirrotta, S., Marchetti, E., Harri, A-M., Montmessin, F., Wilson, C., Rodriguez, I. Arruego, Abbaki, S., Apestigue, V., Bellucci, G., Berthelier, J-J., Calcutt, S. B., Forget, F., Genzer, M., Gilbert, P., Haukka, H., Jimenez, J. J., Jimenez, S., Josset, J-L., Karatekin, O., Landis, G., Lorenz, R., Martinez, J., Mohlmann, D., Moirin, D., Palomba, E., Pateli, M., Pommereau, J-P., Popa, C. I., Rafkin, S., Rannou, P., Renno, N. O., Schmidt, W., Simoes, F., Spiga, A., Valero, F., Vazquez, L., Vivat, F., Witasse, O.

المصدر: 2017 IEEE International Workshop on Metrology for AeroSpace (MetroAeroSpace) Metrology for AeroSpace (MetroAeroSpace), 2017 IEEE International Workshop on. :249-255 Jun, 2017

Relation: 2017 IEEE International Workshop on Metrology for AeroSpace (MetroAeroSpace)

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المؤلفون: Cruz Mermy, G., Schmidt, F., Thomas, I.R., Daerden, F., Ristic, B., Patel, M.R., Lopez-Moreno, J.-J., Bellucci, G., Vandaele, A.C.

المصدر: In Planetary and Space Science 1 September 2022 218

المؤلفون: Oliva, F., Geminale, A., D'Aversa, E., Altieri, F., Bellucci, G., Carrozzo, F. G., Sindoni, G., Grassi, D.

مصطلحات موضوعية: Astrophysics - Earth and Planetary Astrophysics

الوصف: In this study we present the analysis of the dust properties of a local storm imaged in the Atlantis Chaos region on Mars by the OMEGA imaging spectrometer on March 2nd 2005. We use the radiative transfer model MITRA to study the dust properties at solar wavelengths between 0.5 {\mu}m and 2.5 {\mu}m and infer the connection between the local storm dynamics and the topography. We retrieve maps of effective grain radius (reff), optical depth at 9.3 {\mu}m ({\tau}9.3) and top altitude (ta) of the dust layer. Our results show that large particles (reff = 1.6 {\mu}m) are gathered in the centre of the storm (lat=33.5{\deg} S; lon=183.5 W{\deg}), where the optical depth is maximum ({\tau}9.3 > 7.0) and the top altitude exceeds 18 km. Outside the storm, we obtain {\tau}9.3 < 0.2, in agreement with the estimates derived from global climate models (GCM). We speculate that a low thermal inertia region at the western border of Atlantis Chaos is a possible source of the dust storm. Moreover, we find evidence that topography plays a role in confining the local storm in Atlantis Chaos. The vertical wind component from the GCM does not provide any hint for the triggering of dust lifting. On the other hand, the combination of the horizontal and vertical wind profiles suggests that the dust, once lifted, is pushed eastward and then downward and gets confined within the north-east ridge of Atlantis Chaos. (continues in article)

URL الوصول: http://arxiv.org/abs/1709.00986

المؤلفون: Carrozzo, F. G., Altieri, F., Bellucci, G.

المصدر: 2014 6th Workshop on Hyperspectral Image and Signal Processing: Evolution in Remote Sensing (WHISPERS) Hyperspectral Image and Signal Processing: Evolution in Remote Sensing (WHISPERS), 2014 6th Workshop on. :1-4 Jun, 2014

Relation: 2014 6th Workshop on Hyperspectral Image and Signal Processing: Evolution in Remote Sensing (WHISPERS)