189 citations · 2.9k across the 58 of their papers we have counts for
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The WAGGS project - II. The reliability of the calcium triplet as a metallicity indicator in integrated stellar light
Christopher Usher, Thomas Beckwith, Sabine Bellstedt +12
Using data from the WiFeS Atlas of Galactic Globular cluster Spectra we study the behaviour of the calcium triplet (CaT), a popular metallicity indicator in extragalactic stellar p…
Cluster kinematics and stellar rotation in NGC 419 with MUSE and adaptive optics
Sebastian Kamann, Nathan J. Bastian, Tim-Oliver Husser +9
We present adaptive optics (AO) assisted integral-field spectroscopy of the intermediate-age star cluster NGC 419 in the Small Magellanic Cloud. By investigating the cluster dynami…
The origin of the 'blue tilt' of globular cluster populations in the E-MOSAICS simulations
Christopher Usher, Joel Pfeffer, Nate Bastian +3
The metal-poor sub-population of globular cluster (GC) systems exhibits a correlation between the GC average colour and luminosity, especially in those systems associated with mass…
Multiple populations within globular clusters in Early-type galaxies Exploring their effect on stellar initial mass function estimates
William Chantereau, Christopher Usher, Nate Bastian
It is now well-established that most (if not all) ancient globular clusters host multiple popula- tions, that are characterised by distinct chemical features such as helium abundan…
The search for multiple populations in Magellanic Cloud Clusters IV: Coeval multiple stellar populations in the young star cluster NGC 1978
S. Martocchia, F. Niederhofer, E. Dalessandro +15
We have recently shown that the Gyr old Large Magellanic Cloud star cluster NGC 1978 hosts multiple populations in terms of star-to-star abundance variations in [N/Fe]. The…