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Mergers, tidal interactions, and mass exchange in a population of disc globular clusters: II. Long-term evolution
Alessandra Mastrobuono-Battisti, Sergey Khoperskov, Paola Di Matteo +1
Globular clusters (GCs), the oldest stellar systems observed in the Milky Way, have for long been considered single stellar populations. As such, they provided an ideal laboratory…
Mergers, tidal interactions, and mass exchange in a population of disc globular clusters
Sergey Khoperskov, Alessandra Mastrobuono-Battisti, Paola Di Matteo +1
We present the results of a self-consistent -body simulation following the evolution of a primordial population of thick disc globular clusters (GCs). We study how the internal…
Gaia Data Release 2. Summary of the contents and survey properties
Gaia Collaboration, A. G. A. Brown, A. Vallenari +4
We present the second Gaia data release, Gaia DR2, consisting of astrometry, photometry, radial velocities, and information on astrophysical parameters and variability, for sources…
Stellar metallicity variations across spiral arms in disk galaxies with multiple populations
S. Khoperskov, P. Di Matteo, M. Haywood +1
This letter studies the formation of azimuthal metallicity variations in the disks of spiral galaxies in the absence of initial radial metallicity gradients. Using high-resolution…
Radial migration in a stellar galactic disc with thick components
Anaelle Halle, Paola Di Matteo, Misha Haywood +1
We study how migration affects stars of a galaxy with a thin stellar disc and thicker stellar components. The simulated galaxy has a strong bar and lasting spiral arms. We find tha…
Star formation history of the Galactic bulge from deep HST imaging of low reddening windows
Edouard J. Bernard, Mathias Schultheis, Paola Di Matteo +3
Despite the huge amount of photometric and spectroscopic efforts targetting the Galactic bulge over the past few years, its age distribution remains controversial owing to both the…