Dynamos, the drivers of solar and stellar activity
Following Cowling's anti-dynamo theorem of 1933, there was a long period during which the very existence of dynamos was unclear. Even with the emergence of...
Extracting rotation rates on 27-d TESS-like light curves downgrading Kepler data
Evolution of surface magnetic features in the star, such as stellar spots or faculae, can leave a signature in the lightcurves. These features allow us to study...
Finding extra-solar planets in the presence of stellar jitter
The RV method is responsible for discovering the majority of planets that orbit stars other than our Sun. However, one problem with this technique is that...
El Gran Telescopio CANARIAS (GTC) es un telescopio reflector con un espejo primario de 10,4 metros de diámetro. Diseñado con las últimas innovaciones...
IAU G5 -- The GALAH survey: science goals and highlights to date
The field of Galactic archaeology has been very active in recent years, with a major influx of data from the Gaia satellite and large spectroscopic surveys. The...
The new generation of spectrometers designed for extreme precision radial velocities enable correspondingly precise stellar spectroscopy. It is now fruitful to...
Investigating magnetic activity of F stars with the Kepler mission
The dynamo process is believed to drive the magnetic activity of stars like the Sun that have an outer convection zone. Large spectroscopic surveys showed that...
Lithium abundances and Li-7/Li-6 ratios in late-type population I field dwarfs
Using the Coudé Echelle Spectrograph fed by the 1.4 m Coudé Auxiliary Telescope at ESO, La Silla, the authors have obtained a sequence of fourteen high...