Context. The CARMENES spectrograph is surveying ˜300 M dwarf stars in search for exoplanets. Among the target stars, spectroscopic binary systems have been discovered, which can be used to measure fundamental properties of stars. Aims: Using spectroscopic observations, we determine the orbital and physical properties of nine new double-line

We report on the confirmation and mass determination of π Men c, the first transiting planet discovered by NASA's TESS space mission. π Men is a naked-eye (V = 5.65 mag), quiet G0 V star that was previously known to host a sub-stellar companion (π Men b) on a longperiod (Porb = 2091 days), eccentric (e = 0.64) orbit. Using TESS time-series

Context. Exoplanets have now been proven to be very common. The number of its detections continues to grow following the development of better instruments and missions. One key step for the understanding of these worlds is their characterization, which mostly depend on their host stars. Aims: We perform a significant update of the Stars With

In a ΛCDM cosmology, galaxy formation is a globally inefficient process: it is often the case that far fewer baryons are observed in galaxy discs than expected from the cosmic baryon fraction. The location of these `missing baryons' is unclear. By fitting halo profiles to the rotation curves of galaxies in the SPARC data set, we measure the

El Grupo Local (LG) es el hogar de m ́as de 100 galaxias conocidas. La gran mayor ́ıa de ellas son galaxias sat ́elites de la V ́ıa L ́actea (VL) o de la galaxia de Andr ́omeda (M31). Entre las galaxias sat ́elites de la VL, la mayor es la Gran Nube de Magallanes (LMC), que es visible a simple vista debido a su proximidad y brillo. Tambi ́en es el