We use very deep spectra obtained with the Ultraviolet-Visual Echelle Spectrograph at the Very Large Telescope to derive physical conditions and chemical abundances of four H II regions of the Large Magellanic Cloud (LMC) and four H II regions of the Small Magellanic Cloud (SMC). The observations cover the spectral range 3100-10400 Å with a

An incremental version of the fourth catalog of active galactic nuclei (AGNs) detected by the Fermi Large Area Telescope is presented. This version (4LAC-DR3) derives from the third data release of the 4FGL catalog based on 12 yr of E > 50 MeV gamma-ray data, where the spectral parameters, spectral energy distributions (SEDs), yearly light curves

We present a multifrequency analysis of the radio galaxy 3CR 196.1 (z=0.198), associated with the brightest galaxy of the cool-core cluster CIZAJ0815.4-0303. This nearby radio galaxy shows a hybrid radio morphology and an X-ray cavity, all signatures of a turbulent past activity, potentially due to merger events and active galactic nuclei (AGN)

El estudio de la cinemática estelar en galaxias simuladas es un campo de investigación esencial que permite interpretar resultados observacionales y proporciona predicciones teóricas que pueden ser verificadas usando nuevos datos. Los avances tecnológicos han permitido el desarrollo de sofisticadas simulaciones que permiten reproducir galaxias en

Luminous red novae (LRNe) are astrophysical transients believed to be caused by the partial ejection of a binary star's common envelope (CE) and the merger of its components. The formation of the CE is likely to occur during unstable mass transfer, initiated by a primary star which is evolving off the main sequence (a Hertzsprung gap star) and a

Within the inner main belt resides the Erigone asteroid family, which consists of roughly 1776 objects. One of these members is Donaldjohanson, the first target to be visited by the NASA Lucy Mission (the first fly-by mission to study the Trojan asteroids). Previous work done by Morate et al. (2016) combined visible photometry from SDSS and