134 citations · 2.1k across the 59 of their papers we have counts for
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Hubble Space Telescope proper motions of Large Magellanic Cloud star clusters -- II. Kinematic structure of young and intermediate-age clusters
F. Niederhofer, L. Cullinane, D. Massari +14
In this paper, we explore the kinematic properties of a sample of 19 young (<1 Gyr) and intermediate-age (1-2.5 Gyr) massive star clusters within the Large Magellanic Cloud (LMC).…
Cluster Ages to Reconstruct the Milky Way Assembly (CARMA) IV. Chrono-dynamics of seven old star clusters in the Large Magellanic Cloud and the peculiar origin of NGC 1841
F. Niederhofer, D. Massari, F. Aguado-Agelet +15
In this study, we report conclusive evidence for an ancient star cluster that has been accreted by the Large Magellanic Cloud (LMC). By leveraging observations from the Hubble Spac…
Insights into spatial mixing of multiple populations in dynamically-young globular clusters
Václav Pavlík, Melvyn B. Davies, Ellen I. Leitinger +5
Many galactic globular clusters (GCs) contain at least two stellar populations. Recent observational studies found that the radial distributions of the first (P1) and second popula…
Spatial mixing of stellar populations in globular clusters via binary-single star scattering
Václav Pavlík, Melvyn B. Davies, Ellen I. Leitinger +5
The majority of Galactic globular star clusters (GCs) have been reported to contain at least two populations of stars (we use P1 for the primordial and P2 for the chemically-enrich…
RR Lyrae Stars in Intermediate-age Magellanic Clusters: Membership Probabilities and Delay Time Distribution
Bolivia Cuevas-Otahola, Cecilia Mateu, Ivan Cabrera-Ziri +4
Recent works have challenged our canonical view of RR Lyrae (RRL) stars as tracers of exclusively old populations (~Gyr) by proposing a fraction of these stars to be of…
The Kinematics of 30 Milky Way Globular Clusters and the Multiple Stellar Populations within
Ellen Leitinger, Holger Baumgardt, Ivan Cabrera-Ziri +5
The spectroscopic and photometric classification of multiple stellar populations (MPs) in Galactic globular clusters (GCs) has enabled comparisons between contemporary observations…
Hubble Space Telescope proper motions of Large Magellanic Cloud star clusters -- I. Catalogues and results for NGC 1850
F. Niederhofer, A. Bellini, V. Kozhurina-Platais +11
We present proper motion (PM) measurements for a sample of 23 massive star clusters within the Large Magellanic Cloud using multi-epoch data from the Hubble Space Telescope (HST).…
The 33 M black hole Gaia BH3 is part of the disrupted ED-2 star cluster
E. Balbinot, E. Dodd, T. Matsuno +19
The Gaia Collaboration has recently reported the detection of a 33 M black hole in a wide binary system located in the Solar neighbourhood. Here we explore the relationship…
Detailed chemical composition of the globular cluster Sextans A GC-1 on the outskirts of the Local Group
Anastasia Gvozdenko, Søren S. Larsen, Michael A. Beasley +4
The chemical composition of globular clusters (GCs) across the Local Group provides information on chemical abundance trends. The host galaxy, Sextans A, is a low-surface-brightnes…
Measuring M31 globular cluster ages and metallicities using both photometry and spectroscopy
Christopher Usher, Nelson Caldwell, Ivan Cabrera-Ziri
The ages and metallicities of globular clusters play an important role not just in testing models for their formation and evolution but in understanding the assembly history for th…
In-situ or accreted? Using deep learning to infer the origin of extragalactic globular clusters from observables
Sebastian Trujillo-Gomez, J. M. Diederik Kruijssen, Joel Pfeffer +4
Globular clusters (GCs) are powerful tracers of the galaxy assembly process, and have already been used to obtain a detailed picture of the progenitors of the Milky Way. Using the…
A Wide-Field View on Multiple Stellar Populations in 28 Milky Way Globular Clusters
E. Leitinger, H. Baumgardt, I. Cabrera-Ziri +2
The majority of Galactic globular clusters (GCs) contain multiple stellar populations displaying specific chemical abundance variations. In particular, GCs generally contain a `pri…
High-precision abundances of first population stars in NGC 2808: confirmation of a metallicity spread
C. Lardo, M. Salaris, S. Cassisi +4
Photometric investigations have revealed that Galactic globular clusters exhibit internal metallicity variations amongst the so-called first-population stars, until now considered…
Deriving ages and horizontal branch properties of integrated stellar populations
Ivan Cabrera-Ziri, Charlie Conroy
A major source of uncertainty in the age determination of old ( Gyr) integrated stellar populations is the presence of hot horizontal branch (HB) stars. Here, we describe a…
Expanding the time domain of multiple populations: evidences of nitrogen variations in the ~1.5 Gyr old star cluster NGC 1783
M. Cadelano, E. Dalessandro, M. Salaris +5
We present the result of a detailed analysis of HST UV and optical deep images of the massive and young (~1.5 Gyr) stellar cluster NGC 1783 in the Large Magellanic Cloud. This syst…
A black hole detected in the young massive LMC cluster NGC 1850
S. Saracino, S. Kamann, M. G. Guarcello +8
We report the detection of a black hole (NGC 1850 BH1) in the 100 Myr-old massive cluster NGC~1850 in the Large Magellanic Cloud. It is in a binary system with a main-sequenc…
Evidence for C and Mg variations in the GD-1 stellar stream
Eduardo Balbinot, Ivan Cabrera-Ziri, Carmela Lardo
Dynamically cold stellar streams are the relics left over from globular cluster dissolution. These relics offer a unique insight into a now fully disrupted population of ancient cl…
On the Nitrogen variation in ~2 Gyr old massive star clusters in the Large Magellanic Cloud
S. Martocchia, C. Lardo, M. Rejkuba +8
We present ESO/VLT FORS2 low resolution spectroscopy of red giant branch stars in three massive, intermediate age ( Gyr) star clusters in the Large Magellanic Cloud.…
Searching for globular cluster chemical anomalies on the main sequence of a young massive cluster
I. Cabrera-Ziri, J. S. Speagle, E. Dalessandro +9
The spectroscopic and photometric signals of the star-to-star abundance variations found in globular clusters seem to be correlated with global parameters like the cluster's metall…
Photometric characterization of multiple populations in star clusters: The impact of the first dredge-up
Maurizio Salaris, Chris Usher, Silvia Martocchia +6
The existence of star-to-star light-element abundance variations (multiple populations, MPs) in massive Galactic and extragalactic star clusters older than about 2 Gyr is by now we…
Multiple Populations in Integrated Light Spectroscopy of Intermediate Age Clusters
Nate Bastian, Christopher Usher, Sebastian Kamann +9
The presence of star-to-star light-element abundance variations (a.k.a. multiple populations, MPs) appears to be ubiquitous within old and massive clusters in the Milky Way and all…
Constant light element abundances suggest that the extended P1 in NGC 2808 is not a consequence of CNO-cycle nucleosynthesis
I. Cabrera-Ziri, C. Lardo, A. Mucciarelli
Recent photometric results have identified a new population among globular cluster stars. This population, referred to as the ``extended P1'', has been suggested to be the manifest…
Spectroscopic detection of multiple populations in the ~2 Gyr old cluster Hodge 6 in the LMC
K. Hollyhead, S. Martocchia, C. Lardo +8
We report the spectroscopic discovery of abundance spreads (i.e. multiple populations) in the ~2 Gyr old cluster in the LMC, Hodge 6. We use low resolution VLT FORS2 spectra of 15…
Interpreting the complex CMDs of the Magellanic Clouds clusters
I. Cabrera-Ziri, S. Martocchia, K. Hollyhead +1
The Magellanic Clouds host a large population of massive (> 10^4 Msun) star clusters with ages ranging from a few Myr to 12 Gyr. In nearly all cases, close inspection of their CMDs…