Aims: Our goal is to probe the inner structure and the nature of the mid-IR emission in the active galaxy IC 3639, which hosts a Seyfert 2 nucleus and shows signatures of strong star-forming activity. Methods: We used interferometric observations in the N-band with VLTI/MIDI to resolve the mid-IR emission of this nucleus. The origin of the nuclear

Presentamos un estudio arqueoastronómico del yacimiento arqueológico de La Malladeta (La Vila Joiosa, Alicante), santuario ibérico y posteriormente romano altoimperial que se utilizó entre los siglos iv a. C. y i d. C. situado en la cima de un promontorio costero. El seguimiento fotográfico de los ortos solares desde la cima del santuario en fechas

El principal propòsito de esta tesis ha sido la búsqueda y caracterización de estrellas pobres en metales. Para ello se han analizado más de tres millones de espectros de baja resolución provenientes de Sloan Sky Digital Survey (SDSS) y de Large Sky Area Multi-Object Fiber Spectroscopic Telescope (LAMOST), y elaborado un catálogo de estrellas

We present optical photometry (i and Z band) and low-resolution spectroscopy (640-1015 nm) of very faint candidate members (J = 20.2-21.2 mag) of the Pleiades star cluster (120 Myr). The main goal is to address their cluster membership via photometric, astrometric, and spectroscopic studies, and to determine the properties of the least massive

The transverse momentum balance of pairs of back-to-back b quark jets in PbPb and pp collisions recorded with the CMS detector at the LHC is reported. The center-of-mass energy in both collision systems is 5.02 TeV per nucleon pair. Compared to the pp collision baseline, b quark jets have a larger imbalance in the most central PbPb collisions, as