We have performed a spectropolarimetric survey of the variable Mira star omicron Ceti along three pulsation cycles. We present those new data collected with the...

Hydrogen emission lines in Mira variable stars are a well-known phenomenon whose origin has been established as related to the propagation of radiative...

Intermediate-long-slit spectroscopy of the protoplanetary-nebula candidate CRL 618, obtained using an IPCS on the 2.5-m telescope at the Observatorio Roque de...

We present first results concerning the detection of variable stars in the Carina dwarf Spheroidal from B, V images collected with the 4-m CTIO telescope. We...

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We report on follow-up observations of 20 short-duration gamma-ray bursts (T90 2s) performed in g'r'i'z'JHKs with the Gamma-Ray Burst Optical Near-Infrared...

The composition of the most primitive solar system condensates, such as calcium-aluminum-rich inclusions (CAIs) and micron-sized corundum grains, show that...

In a recent preprint, Pepper et al. (2002) evaluate the sensitivity of photon-noise limited transit searches for habitable planets. They conclude that these...

Spectroscopic and spectropolarimetric observations with high spectral resolution provide extremely rich information on the physical conditions of distant...