1,721,187 research outputs found
Dynamics of aspherical dust in cometary atmosphere of 67P/Churyumov- Gerasimenko for GIADA experiment: comparison of the spherical and aspherical model
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Monitoring 67P/C-G coma dust environment from 3.6 AU in-bound to the Sun to 2 AU out-bound
No full textDynamics of aspherical dust for the GIADA experiment in the coma of 67P/Churyumov- Gerasimenko: I. Comparison with the spherical approximation,
No full textGIADA onboard Rosetta characterising comet 67/PChuryumov-Gerasimenko dust environment inbound to and outbound from perihelion.
No full textRecent advances in the model of aspherical dust dynamics for GIADA experiment in the coma of 67P/Churyumov-Gerasimenko
No full textGIADA performances simulation: reconstruction of comet 67P/Churyumov-Gerasimenko dust environment at 3 AU.
No full textSimulation of the cometary 10 Î1⁄4m band by laboratory data. II. Extension to spectra available for different comets
No full textRecent observations have shown that the presence of emission bands at 9.8 and 11.3 Î1⁄4m is a characteristic of many comets. Although their attribution to silicates is commonly accepted, a wide debate is open to identify the actual species responsible for the two bands. In a previous paper (Colangeli et al. 1995a) we fitted emission spectra from comets P/Halley 1986 III and Levy 1990 XX in the 10 Î1⁄4m band region by using spectroscopic data obtained in our laboratory on various silicate samples. In the present work we extend the simulation to available cometary spectra showing similar bands. We show that combinations of pyroxene-type and olivine-type submicron grains produce satisfactory fits. Despite the limited number of observational data available in the literature, our results evidence that spectral variations can be interpreted in terms of intrinsic and/or evolutionary differences among the comets
FE-SEM/EDS and μ-IR combined analysis of HED meteorites in relation to infrared spectra of Vesta-like asteroids
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