Uno de los parámetros mas relevantes en la descripción del Universo es la densidad bariónica media. Esta ha sido estimada a través de las abundancias de los elementos primordiales y confirmada en estudios recientes del espectro de potencias del Fondo Cósmico de Microondas (FCM). Sin embargo, las observaciones de la materia bariónica en el universo

The Multi-Unit Spectroscopic Explorer (MUSE) is a large integral field unit mounted on the ESO Very Large Telescope. Its spatial (60 arcsecond field) and wavelength (4800-9300Å) coverage is well suited to detailed imaging spectroscopy of extended planetary nebulae, such as in the Galaxy. An overview of the capabilities of MUSE applied to Planetary

One of the suggested thick disc formation mechanisms is that they were born quickly and in situ from a turbulent clumpy disc. Subsequently, thin discs formed slowly within them from leftovers of the turbulent phase and from material accreted through cold flows and minor mergers. In this Letter, I propose an observational test to verify this

Context. We describe the atomic and molecular data that were used for the abundance analyses of FGK-type stars carried out within the Gaia-ESO Public Spectroscopic Survey in the years 2012 to 2019. The Gaia-ESO Survey is one among several current and future stellar spectroscopic surveys producing abundances for Milky-Way stars on an industrial

We explore the use of unsupervised machine learning to classify a sample of >9000 nearby galaxies of all types from the SDSS MaNGA survey. Our aim is to find a classification that correlates with physical properties and that arises naturally when combining maps of the average properties of the stellar populations. We use the SimCLR (Simple

The total red shift z might be recast as a combination of the expansion red shift and a static shift due to the energy-momentum tensor non-conservation of a photon propagating through Electro-Magnetic (EM) fields. If massive, the photon may be described by the de Broglie-Proca (dBP) theory which satisfies the Lorentz(-Poincaré) Symmetry (LoSy) but