We present an extension of the spectral deconvolution (SD) method to achieve very high contrast at small inner working radii. We apply the method to the specific case of ground-based adaptive optics fed integral field spectroscopy (without a coronagraph). Utilizing the wavelength dependence of the Airy and speckle patterns, we make an accurate esti...
Using images taken by the Cassini spacecraft, we have identified a longitudinally confined arc of material located at the G ring's inner edge that is roughly five times brighter than other parts of the G ring. Images taken over the last two years show that the orbital mean motion of the arc is 445.475 +/- 0.007 degrees/day, corresponding to a semi-...
(N) NICMOS hot spots detected by Goguen et al.(1998)..(D) Hot spots detected by C. Dumas et al. in 1997 and/or 1998 (pers. commun.).. Keck are hot spots detected by de Pater et al.(2004) and Marchis et al.(2001) from the Keck telescope using Adaptive Optics..(V, G, C) indicate Voyager, Galileo, or Cassini detection. Other ground-based hot spots det...
Using MOST (Microvariability and Oscillations of STars) satellite guide star photometry, we have discovered a metallic A star showing hybrid p-and g-mode pulsations. HD 114839 was observed nearly continuously for 10 days in March, 2005. We identify frequencies in three groups: the first centered near 2 cycles/day, in the gamma Dor pulsation range, ...
We describe an adaptive image deconvolution algorithm (AIDA) for myopic deconvolution of multi-frame and three-dimensional data acquired through astronomical and microscopic imaging. AIDA is a reimplementation and extension of the MISTRAL method developed by Mugnier and co-workers and shown to yield object reconstructions with excellent edge preser...
We present here results on the preservation of organics in highly oxidized rock materials and clay layers drilled from 0-6m-depth (Borehole-7) under the Mars Analog Rio Tinto Experiment (MARTE). This simulated a Mars robotic drilling mission at the RioTinto (Spain)[2, 5]. The RT represents an important analog of the Sinus Meridiani Mars Site, and a...
A long-term adaptive optics (AO) campaign of observing the double Asteroid (90) Antiope has been carried out in 2003–2005 using 8–10-m class telescopes, allowing prediction of the circumstances of mutual events occurring during the July 2005 opposition [Marchis, F., Descamps, P., Hestroffer, D., Berthier, J., de Pater, I., 2004. Bull. Am. Astron. S...
Perets, Hagai B.Lederhendler, AdinaBiham, OferVidali, GianfrancoLi, LingSwords, SolCongiu, EmanueleJoe RoserManico, GiulioBrucato, John Robert
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Experimental results on the formation of molecular hydrogen on amorphous silicate surfaces are presented for the first time and analyzed using a rate equation model. The energy barriers for the relevant diffusion and desorption processes are obtained. They turn out to be significantly higher than those obtained earlier for polycrystalline silicates...