An increasing number of both photometric and spectroscopic observations over the last years have shown the existence of distinct sub-populations in many...

In the last years, photometric and spectroscopic evidence has demonstrated that many, maybe all the Globular Clusters (GC) host multiple stellar populations...

Characterizing multiplicity in the very low mass (VLM) domain is a topic of much current interest and fundamental importance. Here we report on a near-infrared...

We review the properties of multiplicity of very low mass stars and brown dwarfs in different environments and at different ages. We will compare the main...

Interpretation of linearly polarized parameters of the spectral lines of the second solar spectrum permits to obtain information about the magnetic field vector...

The Department of Detectors of the Instituto de Astrofisica de Canarias, Spain is developing a data acquisition system (DAS) for an infrared camera based in a...

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A grid of evolutionary synthesis models for different scenarios (initial mass function slope, metallicity, age, etc.) and computing a set of observables in a...

We report simultaneous X-ray, optical, and radio observations of V404 Cyg in quiescence. The X-ray flux varied dramatically by a factor of >20 during a 60 ks...