Chemically tagging groups of stars born in the same birth cluster is a major goal of spectroscopic surveys. To investigate the feasibility of such strong chemical tagging, we perform a blind chemical tagging experiment on abundances measured from APOGEE survey spectra. We apply a density-based clustering algorithm to the 8D chemical space defined

Blazars are a subclass of Active Galactic Nuclei whose jets closely point to the Earth, characterized by a strong flux variability. These relativistic jets are the main contribution to their optical emission, however, it is possible that other regions of the source (e.g. the host galaxy or the accretion disk) contribute significantly to the

So far, detailed stellar population studies, based on the absorption line strengths have been concentrated mainly in the optical spectral range. In this work, we supplement spectral indices of the Lick system in the optical with additional indices in the near-infrared (NIR). We optimised the definition of the indices to be sensitive to the main

We report the results of optical follow-up observations of 29 gravitational-wave (GW) triggers during the first half of the LIGO-Virgo Collaboration (LVC) O3 run with the Gravitational-wave Optical Transient Observer (GOTO) in its prototype 4-telescope configuration (GOTO-4). While no viable electromagnetic (EM) counterpart candidate was identified

Context. The discovery of Proxima b marked one of the most important milestones in exoplanetary science in recent years. Yet the limited precision of the available radial velocity data and the difficulty in modelling the stellar activity calls for a confirmation of the Earth-mass planet. Aims: We aim to confirm the presence of Proxima b using

The propagation of artificial light into real environments is complex. To perform its numerical modelling with accuracy, one must consider hyperspectral properties of the lighting devices and their geographic positions, the hyperspectral properties of the ground reflectance, the size and distribution of small-scale obstacles, the blocking effect of