We have derived beryllium abundances for 7 Li-rich giant (A(Li) > 1.5) stars and 10 other Li-normal giants with the aim of investigating the origin of the lithium in the Li-rich giants. In particular, we test the predictions of the engulfment scenario proposed by Siess & Livio (1999, MNRAS, 308, 1133), where the engulfment of a brown dwarf or one

We present near-infrared reflectance spectra of two asteroids with low Tisserand invariant, 2906 Caltech and 1373 Cincinnati. The Tisserand invariant is a commonly used dynamical discriminator, with values less than 3 considered suggestive of cometary origin. Asteroids Caltech and Cincinnati have Tisserand invariant values of 2.97 and 2.72

Since 2002, we started an observational program on Jupiter Trojans at ESO-NTT, ESO-VLT and TNG. We carried out visible and near-infrared spectroscopy and photometry of members of dynamical families, as defined by Beauge and Roig (2001), and of several background objects. The aim of these observations was to improve our knowledge of the surface

Not Available

This paper addresses the issue of calibrating the Advanced Technology Solar Telescope for high-precision polarimetry, in particular of the optical train above the Gregorian station (where suitable calibration optics will be placed). Conventional techniques would not be adequate for this telescope given its large aperture. Here we explore two

We report spectroscopic observations of the earthshine reflected from the Moon. By applying our well-developed photometry methodology to spectroscopy, we are able to precisely determine the Earth's reflectance and its variation as a function of wavelength through a single night as the Earth rotates. These data imply that planned regular monitoring