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Gaia Early Data Release 3: The Gaia Catalogue of Nearby Stars
Gaia Collaboration, R. L. Smart, L. M. Sarro +420
We produce a clean and well-characterised catalogue of objects within 100\,pc of the Sun from the \G\ Early Data Release 3. We characterise the catalogue through comparisons to the…
Gaia Early Data Release 3: Acceleration of the solar system from Gaia astrometry
Gaia Collaboration, S. A. Klioner, F. Mignard +414
Context. Gaia Early Data Release 3 (Gaia EDR3) provides accurate astrometry for about 1.6 million compact (QSO-like) extragalactic sources, 1.2 million of which have the best-quali…
Time evolution of gaps in stellar streams in axisymmetric Stäckel potentials
Helmer H. Koppelman, Amina Helmi
When a subhalo interacts with a cold stellar stream it perturbs its otherwise nearly smooth distribution of stars, and this leads to the creation of a gap. The properties of such g…
Frequencies, chaos and resonances: a study of orbital parameters of nearby thick disc and halo stars
Helmer H. Koppelman, Jorrit H. J. Hagen, Amina Helmi
We study the distribution of nearby thick disc and halo stars in subspaces defined by their characteristic orbital parameters. Our aim is to establish the origin of the structure r…
The heavy-elements heritage of the falling sky
Alejandra Recio-Blanco, Emma Fernández Alvar, Patrick de Laverny +3
Recent dynamical analysis based on Gaia data have revealed major accretion events in Milky Way's history. Nevertheless, our understanding of the primordial Galaxy is hindered becau…
Galactic potential constraints from clustering in action space of combined stellar stream data
Stella Reino, Elena M. Rossi, Robyn E. Sanderson +4
Stream stars removed by tides from their progenitor satellite galaxy or globular cluster act as a group of test particles on neighboring orbits, probing the gravitational field of…