This thesis focuses on the study of atmospheres of main sequence cool stars (spectral types G2V, K0V, and M2V, with solar metallicity) by means of three-dimensional time-dependent magneto-hydrodynamic simulations of their near-surface convection and photospheres. The simulations are computed with the MANCHA code, which is adapted to simulate other

Históricamente, los mapas celestes han sido la principal fuente de datos astronómicos, utilizados para explorar y comprender el Universo. Este trabajo está dedicado al estudio de uno de ellos, Lockman-SpReSO, un seguimiento espectroscópico óptico cartográfico de fuentes seleccionadas por su emisión infrarroja, a partir de observaciones previas con

Accretion onto compact objects, such as black holes and neutron stars, is one of the most powerful processes in the Universe, involving large exchanges of mass and energy. Among the astrophysical systems where this phenomenon is observed, X-ray binaries are particularly relevant due to their relatively short timescales of evolution, which are