Axion models with generation-dependent Peccei-Quinn charges can lead to flavor-changing neutral currents, thus motivating QCD axion searches at precision flavor experiments. We rigorously derive limits on the most general effective flavor-violating couplings from current measurements and assess their discovery potential. For two-body decays, we use

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

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

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

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

In this work, we study the structure of the outer Galactic disk up to Galactocentric distance R=20 kpc. We use the Gaia DR2 data on which we apply a deconvolution technique in the parallax errors. We recover for each line of sight the distribution of stars as a function of distance, which we use to construct density maps, that we analyze. We study