We have obtained series of continuous differential photometry in the J and KS bands for several L-type dwarfs. We intend to search for photometric variability in order to: - investigate the variability amplitude associated to atmospheric changes in time-scales from minutes to several hours, - investigate rotation periods through light curve

We present a detailed study of the edge-on S0 galaxy NGC7332. We show that this object lies significantly below the fundamental plane of early-type galaxies. To understand this behaviour, we have carried out observations with the Integral Field Spectrograph SAURON, which give us a detailed view of the internal kinematics and gas and stars in this

In this paper we give a geometrical interpretation of an extension of mixed Hodge structures (MHS) obtained from the canonical MHS on the group ring of the fundamental group of a hyperelliptic curve modulo the fourth power of its augmentation ideal. We show that the class of this extension coincides with the regulator image of a canonical higher

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We present Keck K-band observations of GX 17+2 which reveal a bright counterpart in the radio error circle of Deutsch et al. (1999), coincident with their star ``A''. These observations imply an amplitude of variability of ~25--40 between our measurements and the IR observations of Deutsch et al. (1999). However, quasi-simultaneous RXTE ASM

``Böhm-Vitense gaps,'' discontinuities in the color distribution of A-F type stars along the main sequence, have traditionally been attributed to the abrupt onset of strong convection (8000 K>=Teff>=6400 K) in stellar atmospheres and envelopes. Using the full spectrum of turbulence model to describe convective transport (Canuto, Goldman, &