We present new photometric and spectroscopic measurements for the unique, young, low-mass evolutionary track calibrator AB Dor C. While the new K s photometry is similar to that we have previously published, the spectral type is found to be much earlier. Based on new H and K IFS spectra of AB Dor C from Thatte et al.(Paper I), we adopt a spectral t...
Aims. In order to gain new insight into the unidentified identity of the diffuse interstellar band (DIB) carriers, this paper describes research into possible links between the shape of the interstellar extinction curve (including the 2175 Å bump and far-UV rise), the presence or absence of DIBs, and physical and chemical conditions of the diffuse ...
We describe a powerful signal processing method, the continuous wavelet transform, and use it to analyze radial structure in Cassini ISS images of Saturn s rings. Wavelet analysis locally separates signal components in frequency space, causing many structures to become evident that are difficult to observe with the naked eye. Density waves, generat...
We conducted numerical simulations of 3,830 massless test particles in the Saturn system near the 7: 6 corotation eccentricity resonance (CER) with Mimas, in response to the recent observations of an arc in the faint and dusty G Ring (see Hedman et al, this conference). We simulated 80 years of evolution, taking into account the perturbations of Sa...
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...
