This is an exciting time for the study of r-process nucleosynthesis. Recently, a neutron star
merger GW170817 was observed in extraordinary detail with gravitational waves and …

Context. In the last 15 years different ground-based spectroscopic surveys have been
started (and completed) with the general aim of delivering stellar parameters and elemental …

Context. The motion of stars has been used to reveal details of the complex history of the
Milky Way, in constant interaction with its environment. Nevertheless, to reconstruct the …

Brown dwarfs are the coolest class of stellar objects known to date. Our present perception
is that brown dwarfs follow the principles of star formation, and that brown dwarfs share …

Using a sample of 69,919 red giants from the SDSS-III/APOGEE Data Release 12, we
measure the distribution of stars in the [α/Fe] versus [Fe/H] plane and the metallicity …

The Gaia mission has provided an invaluable wealth of astrometric data for more than a
billion stars in our Galaxy. The synergy between Gaia astrometry, photometry, and …

Investigations of the origin and evolution of the Milky Way disc have long relied on chemical
and kinematic identifications of its components to reconstruct our Galactic past. Difficulties in …

Satellites orbiting disk galaxies can induce phase space features such as spirality, vertical
heating and phase-mixing in their disks. Such features have also been observed in our own …

We present the first APOKASC catalog of spectroscopic and asteroseismic properties of
1916 red giants observed in the Kepler fields. The spectroscopic parameters provided from …

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 …