Chariklo is known to possess an exotic ring system and we show indications from several distinct data sets that Chiron also has a ring system with similar features to that of Chariklo, although its case is somewhat more complex because Chariklo has never shown cometary-like activity, whereas Chiron has.

Within the context of the collaboration "B fields in OB stars" (BOB), we used the FORS2 low-resolution spectropolarimeter to search for a magnetic field in 50 massive stars, including two reference magnetic massive stars. Because of the many controversies of magnetic field detections obtained with the FORS instruments, we derived the magnetic field

This paper highlights very recent advances concerning the identification of new mechanisms that introduce polarization in spectral lines, which turn out to be key for understanding some of the most enigmatic scattering polarization signals of the solar visible spectrum. We also show a radiative transfer prediction on the scattering polarization

Desde el comienzo de la astrofísica extragaláctica en los años 30 - gracias al trabajo de Edwin Hubble quien constató que nuestra galaxia era solamente una entre millones - el estudio de la formación y evolución de galaxias se ha convertido en un sector muy estudiado dentro de la investigación astrofísica. Se han hecho enormes esfuerzos para

The molecular carriers of the ubiquitous absorption features called the diffuse interstellar bands (DIBs) have eluded identification for many decades, in part because of the enormous parameter space spanned by the candidates and the limited set of empirical constraints afforded by observations in the diffuse interstellar medium. Detection of these

We used a new generation of asymptotic giant branch (AGB) stellar models that include dust formation in the stellar winds to find the links between evolutionary models and the observed properties of a homogeneous sample of Large Magellanic Cloud (LMC) planetary nebulae (PNe). Comparison between the evolutionary yields of elements such as CNO and