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Young, wild and free: the early expansion of star clusters
Alessandro Della Croce, Emanuele Dalessandro, Alexander R. Livernois +1
Early expansion plays a fundamental role in the dynamical evolution of young star clusters. However, until very recently most of our understanding of cluster expansion was based on…
GN-z11: witnessing the formation of second generation stars and an accreting massive black hole in a massive star cluster
F. D'Antona, E. Vesperini, F. Calura +7
We explore the possibility that the N-rich young proto-galaxy GN-z11 recently observed at z=10.6 by the James Webb Space Telescope is the result of the formation of second generati…
Is the M81 Fast Radio Burst Host Globular Cluster Special?
Kristen C. Dage, Arash Bahramian, Clancy W. James +5
We use multiband archival HST observations to measure the photometric and structural parameters of the M81 globular cluster that hosts the Fast Radio Burst FRB 20200120E. Our best-…
Shaping the unseen: the influence of baryons and environment on low-mass, high-redshift dark matter haloes in the SIEGE simulations
R. Pascale, F. Calura, A. Lupi +7
We use zoom-in, hydrodynamical, cosmological -body simulations tracing the formation of the first stellar clumps from the SImulating the Environments where Globular clusters Eme…
Exploring the Structures and Substructures of the Andromeda Satellite Dwarf Galaxies Cassiopeia III, Perseus I, and Lacerta I
Katherine L. Rhode, Nicholas J. Smith, Denija Crnojevic +8
We present results from wide-field imaging of the resolved stellar populations of the dwarf spheroidal galaxies Cassiopeia III (And XXXII) and Perseus I (And XXXIII), two satellite…
Effects of massive central objects on the degree of energy equipartition of globular clusters
Francisco I. Aros, Enrico Vesperini
We present an analysis of the degree of energy equipartition in a sample of 101 Monte Carlo numerical simulations of globular clusters (GCs) hosting either a system of stellar-mass…
The structural properties of multiple populations in the dynamically young globular cluster NGC 2419
Silvia Onorato, Mario Cadelano, Emanuele Dalessandro +3
NGC 2419 is likely the globular cluster (GC) with the lowest dynamical age in the Galaxy. This makes it an extremely interesting target for studying the properties of its multiple…
An ongoing tidal capture in the Large Magellanic Cloud: the low-mass star cluster KMK88-10 captured by the massive globular cluster NGC 1835?
Camilla Giusti, Mario Cadelano, Francesco R. Ferraro +6
In the context of a project aimed at characterizing the dynamical evolution of old globular clusters in the Large Magellanic Cloud, we have secured deep HST/WFC3 images of the mass…
Fast rotating Blue Stragglers prefer loose clusters
Francesco R. Ferraro, Alessio Mucciarelli, Barbara Lanzoni +9
Blue stragglers are anomalously luminous core hydrogen-burning stars formed through mass-transfer in binary/triple systems and stellar collisions. Their physical and evolutionary p…
Internal kinematics and structure of the bulge globular cluster NGC 6569
Cristina Pallanca, Silvia Leanza, Francesco R. Ferraro +8
In the context of a project aimed at characterizing the properties of star clusters in the Galactic bulge, here we present the determination of the internal kinematics and structur…
Empirical measurement of the dynamical ages of three globular clusters and some considerations on the use of the dynamical clock
Francesco R. Ferraro, Barbara Lanzoni, Enrico Vesperini +3
We have used the ``dynamical clock'' to measure the level of dynamical evolution reached by three Galactic globular clusters (namely, NGC 3201, NGC 6316 and NGC 6440). This is an e…
Multiple Stellar Populations in Metal-Poor Globular Clusters with JWST: a NIRCam view of M92
Tuila Ziliotto, Antonino P. Milone, Anna F. Marino +10
Recent work on metal-intermediate globular clusters (GCs) with [Fe/H]= and has illustrated the theoretical behavior of multiple populations in photometric diagrams ob…
On the role of dust and mass loss in the extended main sequence turnoff of star clusters: the case of NGC 1783
F. D'Antona, F. Dell'Agli, M. Tailo +6
The Color Magnitude Diagram (CMD) morphology of the "extended" main sequence turnoff (eMSTO) and upper main sequence (MS) of the intermediate age ( Gyr) Large Magellani…
Ongoing hierarchical massive cluster assembly: the LISCA II structure in the Perseus complex
A. Della Croce, E. Dalessandro, A. Livernois +7
We report on the identification of a massive ( M) sub-structured stellar system in the Galactic Perseus complex likely undergoing hierarchical cluster assembly. S…
First observational evidence of a relation between globular clusters' internal rotation and stellar masses
M. Scalco, A. Livernois, E. Vesperini +3
Several observational studies have shown that many Galactic globular clusters (GCs) are characterised by internal rotation. Theoretical studies of the dynamical evolution of rotati…
Evolution of binary stars in the early evolutionary phases of ultra-faint dwarf galaxies
Alexander R. Livernois, Enrico Vesperini, Václav Pavlík
The dynamics of binary stars provides a unique avenue to gather insight into the study of the structure and dynamics of star clusters and galaxies. In this paper, we present the re…
Photometric binaries, mass functions, and structural parameters of 78 Galactic open clusters
Giacomo Cordoni, Antonino P. Milone, Anna F. Marino +8
Binary stars play a crucial role in our understanding of the formation and evolution of star clusters and their stellar populations. We use Gaia Data Release 3 to homogeneously ana…
New parameters for star cluster dynamics: the effect of primordial binaries and dark remnants
Bhavana Bhat, Barbara Lanzoni, Francesco R. Ferraro +1
By studying the normalized cumulative radial distribution (nCRD) of the stars in the central region of a Monte Carlo-simulated globular cluster, we recently defined three parameter…
The Hubble Space Telescope UV Legacy Survey of Galactic Globular Clusters. XXIV. Differences in internal kinematics of multiple stellar populations
M. Libralato, E. Vesperini, A. Bellini +12
Our understanding of the kinematic properties of multiple stellar populations (mPOPs) in Galactic globular clusters (GCs) is still limited compared to what we know about their chem…