134 citations · 2.1k across the 59 of their papers we have counts for
5 papers · 1 filter
Disappearance of the extended main sequence turn-off in intermediate age clusters as a consequence of magnetic braking
C. Georgy, C. Charbonnel, L. Amard +8
Extended MS turn-offs are features commonly found in the colour-magnitude diagrams of young and intermediate age (less than about 2 Gyr) massive star clusters, where the MS turn-of…
Extended Main Sequence Turnoffs in Open Clusters as Seen by Gaia: I. NGC 2818 and the Role of Stellar Rotation
N. Bastian, S. Kamann, I. Cabrera-Ziri +5
We present an analysis of the relatively low mass (~M), ~Myr, Galactic open cluster, NGC~2818, using Gaia DR2 results combined with VLT/FLAMES spectros…
A critical re-evaluation of the Thorne-Żytkow object candidate HV 2112
Emma R. Beasor, Ben Davies, Ivan Cabrera-Ziri +1
It has been argued in the literature that the star HV~2112 in the Small Magellanic Cloud is the first known example of a TŻO, a Red Supergiant with a degenerate neutron core. This…
Chemical Inhomogeneities Amongst First Population Stars in Globular Clusters: Evidence for He variations
Carmela Lardo, Maurizio Salaris, Nate Bastian +3
Spreads in light element abundances among stars (a.k.a. multiple populations) are observed in nearly all globular clusters. One way to map such chemical variations using high-preci…
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…