Context. In June 2022, Gaia DR3 provided the astronomy community with about one million
spectra from the Radial Velocity Spectrometer (RVS) covering the CaII triplet region. In the …

Lithium's susceptibility to burning in stellar interiors makes it an invaluable tracer for
delineating the evolutionary pathways of stars, offering insights into the processes governing …

We report the serendipitous discovery of a very metal-poor (VMP) Li-rich giant star (T eff=
4690±80 K, log g= 1.34±0.13,[Fe/H]=− 2.43±0.07). We analyse the Li i 6103 and 6707 Å …

Context. To take full advantage of upcoming large-scale spectroscopic surveys, it will be
necessary to parameterize millions of stellar spectra in an efficient way. Machine learning …

Context. Hot subdwarf stars are compact blue evolved objects, burning helium in their cores
surrounded by a tiny hydrogen envelope. In the Hertzsprung-Russell Diagram they are …

Stellar atmosphere modelling predicts the luminosity and temperature of a star, together with
parameters such as the effective gravity and the metallicity, by reproducing the observed …

Context. Lithium plays a crucial role in probing stellar physics, stellar and primordial
nucleosynthesis, and the chemical evolution of the Galaxy. Stars are considered to be the …

The High-Resolution Multi-Object Spectrograph (HRMOS) is a facility instrument that we
plan to propose for the Very Large Telescope (VLT) of the European Southern Observatory …

Large sky spectroscopic surveys have reached the scale of photometric surveys in terms of
sample sizes and data complexity. These huge datasets require efficient, accurate, and …

Lithium depletion in the Universe remains a matter of investigation This book aims to carry
out a wide-ranging inquisitive review of over half a century of astronomical observations of …