Context. Precise stellar ages from asteroseismology have become available and can help to
set stronger constraints on the evolution of the Galactic disc components. Recently …

Context. The analysis of the latest release of the Apache Point Observatory Galactic
Evolution Experiment project (APOGEE DR16) data suggests the existence of a clear …

Motivated by a new wave of kinematical tracers in the outer regions of early-type galaxies
(ellipticals and lenticulars), we re-examine the role of angular momentum in galaxies of all …

Context. Even though turbulent motions are found everywhere in astrophysical systems, the
origin of this turbulence is poorly understood. When cosmic structures form, they grow in …

Turbulence is ubiquitous in the insterstellar medium and plays a major role in several
processes such as the formation of dense structures and stars, the stability of molecular …

For most of their lives, galaxies are surrounded by large and massive coronae of hot gas,
which constitute vast reservoirs for gas accretion. This chapter describes a mechanism that …

We present a systematic study of the extraplanar gas (EPG) in a sample of 15 nearby late-
type galaxies at intermediate inclinations using publicly available, deep interferometric HI …

Context. The recent Gaia Data Release 3 (DR3) represents an unparalleled revolution in
Galactic archaeology, providing numerous radial velocities and chemical abundances for …

Context. The [Mg/Fe] abundance ratios are a fundamental fossil signature used to trace the
chemical evolution of the disc and to divide it into low-α and high-α populations. Despite the …

In galaxies like the Milky Way, cold (∼ 104 K) gas ejected from the disc by stellar activity (the
so-called galactic-fountain gas) is expected to interact with the virial-temperature (∼ 106 K) …