A catalogue of galaxies with extremely red colours (R-J≥5), covering 8.43 square degrees has been selected from optical and near-infrared data. Based on their...

The interpretation of detailed spectroscopic observations of different stars reveals inconsistencies, due likely to inadequacies of the underlying hypothesis...

The interpretation of detailed spectroscopic observations of late‐type stars reveals inconsistencies that are likely due to inadequacies of the underlying...

In this paper the Paranal Surface Layer characterization is presented. Causes, physics and behavior of the SL above Paranal surface are discussed. The analysis...

In its most general acceptation, surface photometry is a technique applicable to any "extended" object, irrespective of the spectral band of the observational...

Not Available

Dark magnetic spots co-rotating with the stellar surface lead to quasi-periodic brightness variations, which enclose relevant information on stellar rotation...

Stars with an external convective envelope have rotation periods that evolve as the square root of the age on the main sequence. This led to empirical...

Rotation plays an important role in the evolution of stars. For decades rotation-age relationships have been used as surface rotation can be measured rather...