We present a conceptual optical design for a new refractive corrector for the prime focus of the 4.2 m William Herschel Telescope, optimised to allow wide-field multi-object spectroscopy.

Stellar Kinematic Groups are kinematical coherent groups of stars which might share a common origin. These groups spread through the Galaxy over time due to tidal effects caused by galactic rotation and disc heating, however the chemical information survives. The aim of chemical tagging is to show that abundances of every chemical element must be

With the help of CARMENCITA, the CARMENES Cool dwarf Information and daTa Archive (see SEA poster by Caballero et al.), we investigate the membership in double, triple or higher-order multiplicity systems of more than 1300 of the brightest, latest M dwarfs in the solar neighbourhood observable from Calar Alto. We use data compiled from the

This work investigates the effect of the aperture size on derived galaxy properties for which we have spatially-resolved optical spectra. We focus on some indicators of star formation activity and dust attenuation for spiral galaxies that have been widely used in previous work on galaxy evolution. We investigated 104 spiral galaxies from the CALIFA

We report striking changes in the broadband spectrum of the compact jet of the black hole transient MAXI J1836–194 over state transitions during its discovery outburst in 2011. A fading of the optical-infrared (IR) flux occurred as the source entered the hard-intermediate state, followed by a brightening as it returned to the hard state. The

We demonstrate in this work that it is possible to derive spectra of integrated absorption lines for any type stellar system using the GTC/OSIRIS Tunable Filters and a novel observing technique which allows for a reconstruction of the line profiles. The method has been successfully proven for the globular cluster system of VCC1261, a dwarf