El enfoque de esta tesis es el estudio de la Luz de Fondo Extragaláctica (EBL). La EBL es la luz acumulada proveniente de la formación y evolución de las galaxias, directamente o reprocesada por el polvo. Por esa razón, la EBL proporciona informaciones clave sobre la historia de las formaciones de las estrellas y galaxias, y es esencial para un

We aim to review the spectral synthesis technique to derive the stellar atmospheric parameters (T eff, log g, and [Fe/H]) of 348 M dwarfs in light of the optical and near-infrared spectra obtained with CARMENES, the high-resolution, double-channel spectrograph installed at the 3.5 m telescope at the Calar Alto observatory (Spain). The analysis

We aim to review the spectral synthesis technique to derive the stellar atmospheric parameters (T eff, log g, and [Fe/H]) of 348 M dwarfs in light of the optical and near-infrared spectra obtained with CARMENES, the high-resolution, double-channel spectrograph installed at the 3.5 m telescope at the Calar Alto observatory (Spain). The analysis

C-type rubble pile asteroid (162173) Ryugu was observed and characterized up close for a year and a half by the instruments on-board the Japanese Aerospace eXploration Agency (JAXA) Hayabusa2 spacecraft. The asteroid exhibits relatively homogeneous spectral characteristics at near-infrared wavelengths (~1.8-3.2 μm), including a very low reflectance

The recent era of large, ground-based abundance surveys has unraveled the chemical structures of our Milky Way galaxy. The most striking abundance feature is the alpha-abundance bimodality. The low-alpha stars are younger (1-8 Gyr) while the high-alpha stars are older (8-12 Gyr) and have a thicker distribution. There are a number of different

We report on an ongoing search for biomarkers in the potentially habitable atmospheres of a sample of a dozen Y dwarfs with Teff estimated at around or below 400 K. This work is being carried out using public data from large area optical surveys such as DES and PANStarrs. We focus on a search for g-band emission as an analogue to terrestrial