In main-sequence, low-mass (<1.3 Solar mass) stars, rotation and magnetic activity decrease over time, with the spin-down thought to be due to angular momentum lost through magnetized winds. This magnetic activity heats the stellar atmospheres, leading to the production of Hα, ultraviolet (UV), and X-ray radiation, each originating from different

The relation between nuclear star clusters (NSCs) and the growth of the central supermassive black holes (SMBHs), as well as their connection to the properties of the host galaxies, is crucial for understanding the evolution of galaxies. Recent observations have revealed that about 10% of nucleated galaxies host hybrid nuclei, consisting of both

The Roque de los Muchachos Observatory (ORM), part of the Observatorios de Canarias (OCAN) alongside the Observatorio del Teide (OT) on Tenerife, is one of the most important astronomical sites in the world. Together, these observatories host the telescopes and instruments of around 60 institutions from over 20 countries, forming the EU's largest