G. Cordoni
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View article: Stellar spin in young star clusters: comparison between simulations and observations
Stellar spin in young star clusters: comparison between simulations and observations Open
The angular momentum evolution of stars is crucial for understanding the formation and evolution of stars and star clusters. Using high-resolution magnetohydrodynamical simulations of star formation in clouds with different physical proper…
View article: The Small Magellanic Cloud through the lens of the <i>James Webb</i> Space Telescope: Binaries and the mass function in the galaxy’s outskirts
The Small Magellanic Cloud through the lens of the <i>James Webb</i> Space Telescope: Binaries and the mass function in the galaxy’s outskirts Open
The stellar initial mass function (IMF) and the fraction of binary systems are fundamental ingredients that govern the formation and evolution of galaxies. Whether the IMF is universal or varies with environment remains one of the central …
View article: Tracing ωCentauri's origins: Spatial and chemical signatures of its formation history
Tracing ωCentauri's origins: Spatial and chemical signatures of its formation history Open
ω}Centauri (ωCen) is the most enigmatic Galactic globular cluster (GC), with unmatched chemical complexity. We combine photometric and spectroscopic catalogs to identify its distinct stellar populations and to investigate their spatial dis…
View article: The impact of rotational mixing in intermediate-age star clusters with extended main-sequence turn-offs and extended red clumps
The impact of rotational mixing in intermediate-age star clusters with extended main-sequence turn-offs and extended red clumps Open
The extended main-sequence turn-offs (eMSTOs) and extended red clumps (eRCs) observed in intermediate-age star clusters challenge the traditional understanding of clusters as simple stellar populations. Recently, eMSTOs have been interpret…
View article: The impact of rotational mixing in intermediate-age star clusters with extended main-sequence turn-offs and extended red clumps
The impact of rotational mixing in intermediate-age star clusters with extended main-sequence turn-offs and extended red clumps Open
The extended main-sequence turn-offs (eMSTOs) and extended red clumps (eRCs) observed in intermediate-age star clusters challenge the traditional understanding of clusters as simple stellar populations. Recently, eMSTOs have been interpret…
View article: Hunting for UVdim stars in Galactic open clusters. Clues from ultraviolet photometry
Hunting for UVdim stars in Galactic open clusters. Clues from ultraviolet photometry Open
Split main-sequences and extended main-sequence turn-offs (eMSTOs) have been observed in nearly all Magellanic Clouds clusters younger than 2 Gyr. More recently, Hubble Space Telescope (HST) ultraviolet photometry uncovered a puzzling new …
View article: Hunting for UVdim stars in Galactic Open clusters. Clues from ultraviolet photometry
Hunting for UVdim stars in Galactic Open clusters. Clues from ultraviolet photometry Open
Split main-sequences (MSs) and extended main-sequence turn-offs (eMSTOs) have been observed in nearly all Magellanic Clouds clusters younger than 2 Gyr. More recently, Hubble Space Telescope (HST) ultraviolet photometry uncovered a puzzlin…
View article: A joint JWST and HST view of Omega Centauri: Multiple stellar populations and their kinematics
A joint JWST and HST view of Omega Centauri: Multiple stellar populations and their kinematics Open
We combine F115W and F277W images collected with the Near Infrared Camera of the James Webb Space Telescope (JWST) with multi-band, multi-epoch Hubble Space Telescope (HST) observations of Omega Centauri to investigate its multiple stellar…
View article: A JWST project on 47 Tucanae
A JWST project on 47 Tucanae Open
Almost all globular clusters (GCs) contain multiple stellar populations consisting of stars with varying helium and light-element abundances. These populations include first-population stars, which exhibit similar chemical compositions as …
View article: A <i>JWST</i> project on 47 Tucanae: Kinematics, energy equipartition, and anisotropy of multiple populations
A <i>JWST</i> project on 47 Tucanae: Kinematics, energy equipartition, and anisotropy of multiple populations Open
Recent work with JWST has demonstrated its capability to identify and chemically characterize multiple populations in globular clusters down to the H-burning limit. In this study, we explore the kinematics of multiple populations in the gl…
View article: Linking photometry and spectroscopy: profiling multiple populations in globular clusters
Linking photometry and spectroscopy: profiling multiple populations in globular clusters Open
Our understanding of multiple populations in globular clusters (GCs) largely comes from photometry and spectroscopy. Appropriate photometric diagrams are able to disentangle first and second populations (1P and 2P, respectively), with 1P h…
View article: Exploring the formation environment and dynamics of multiple stellar populations in globular clusters through binary systems
Exploring the formation environment and dynamics of multiple stellar populations in globular clusters through binary systems Open
Aims . Globular clusters (GCs) are known to host distinct stellar populations, characterized by different chemical compositions. Despite extensive research, the origin of these populations remains elusive. According to many formation scena…
View article: Exploring multiple stellar populations in globular clusters with <i>Euclid</i>: A theoretical overview and insights from NGC 6397
Exploring multiple stellar populations in globular clusters with <i>Euclid</i>: A theoretical overview and insights from NGC 6397 Open
We investigate the behavior of multiple stellar populations in globular clusters (GCs) using photometric diagrams constructed with Euclid photometry. By employing synthetic spectra and isochrones that incorporate the chemical differences b…
View article: Linking Photometry and spectroscopy: profiling multiple populations in globular clusters
Linking Photometry and spectroscopy: profiling multiple populations in globular clusters Open
Our understanding of multiple populations in globular clusters (GCs) largely comes from photometry and spectroscopy: appropriate photometric diagrams can disentangle first and second populations (1P and 2P)-1P having chemical signatures si…
View article: C3PO – IV. Co-natal stars depleted in refractories are magnetically more active – possible imprints of planets
C3PO – IV. Co-natal stars depleted in refractories are magnetically more active – possible imprints of planets Open
Chemical abundance anomalies in twin stars have recently been considered tell-tale signs of interactions between stars and planets. While such signals are prevalent, their nature remains a subject of debate. On the one hand, exoplanet form…
View article: C3PO IV: co-natal stars depleted in refractories are magnetically more active -- possible imprints of planets
C3PO IV: co-natal stars depleted in refractories are magnetically more active -- possible imprints of planets Open
Chemical abundance anomalies in twin stars have recently been considered tell-tale signs of interactions between stars and planets. While such signals are prevalent, their nature remains a subject of debate. On one hand, exoplanet formatio…
View article: Mass loss along the red giant branch of the intermediate stellar populations in NGC 6752 and NGC 2808
Mass loss along the red giant branch of the intermediate stellar populations in NGC 6752 and NGC 2808 Open
The morphology of the horizontal branch (HB) in globular clusters (GCs) offers some early evidence that they contain multiple populations of stars. Indeed, the location of each star along the HB depends both on its initial helium content (…
View article: New Perspective on the Multiple-population Phenomenon in Galactic Globular Clusters from a Wide-field Photometric Survey
New Perspective on the Multiple-population Phenomenon in Galactic Globular Clusters from a Wide-field Photometric Survey Open
Wide-field photometry of Galactic globular clusters (GCs) has been investigated to overcome limitations from the small field of view of the Hubble Space Telescope in the study of multiple populations. In particular, “chromosome maps” (ChMs…
View article: Mass loss along the red giant branch of the intermediate stellar populations in NGC6752 and NGC2808
Mass loss along the red giant branch of the intermediate stellar populations in NGC6752 and NGC2808 Open
The morphology of the Horizontal Branch (HB) in Globular Clusters (GC) is among the early evidences that they contain multiple populations of stars. Indeed, the location of each star along the HB depends both on its initial helium content …
View article: A JWST project on 47 Tucanae: kinematics, energy equipartition and anisotropy of multiple populations
A JWST project on 47 Tucanae: kinematics, energy equipartition and anisotropy of multiple populations Open
Recent work with JWST has demonstrated its capability to identify and chemically characterize multiple populations in globular clusters down to the H-burning limit. In this study, we explore the kinematics of multiple populations in the gl…
View article: New perspective on the multiple population phenomenon in Galactic globular clusters from a wide-field photometric survey
New perspective on the multiple population phenomenon in Galactic globular clusters from a wide-field photometric survey Open
Wide-field photometry of Galactic globular clusters (GCs) has been investigated to overcome limitations from the small field of view of the Hubble Space Telescope in the study of multiple populations. In particular, 'chromosome maps' (ChMs…
View article: Internal dynamics of multiple populations in 28 Galactic globular clusters: a wide-field study with <i>Gaia</i> and the <i>Hubble Space Telescope</i>
Internal dynamics of multiple populations in 28 Galactic globular clusters: a wide-field study with <i>Gaia</i> and the <i>Hubble Space Telescope</i> Open
We present a detailed analysis of the internal dynamics of multiple stellar populations (MPs) in 28 Galactic globular clusters (GCs) across a wide field of view, extending from the innermost regions to the clusters’ outskirts. Using astrop…
View article: Exploring Simple-population and Multiple-population Globular Clusters in the Outer Galactic Halo Using the Hubble Space Telescope
Exploring Simple-population and Multiple-population Globular Clusters in the Outer Galactic Halo Using the Hubble Space Telescope Open
The pseudo two-color diagram, known as chromosome map (ChM), is a valuable tool for identifying globular clusters (GCs), which consist of single or multiple stellar populations (MPs). Recent surveys of Galactic GCs using ChMs have provided…
View article: Exploring Multiple Stellar Populations in Globular Clusters with Euclid: A Theoretical Overview and Insights from NGC 6397
Exploring Multiple Stellar Populations in Globular Clusters with Euclid: A Theoretical Overview and Insights from NGC 6397 Open
We investigate the behavior of multiple stellar populations in globular clusters (GCs) using photometric diagrams constructed with Euclid photometry. By employing synthetic spectra and isochrones that incorporate the chemical differences b…
View article: Rubin Data Preview 1: Extending the view of unresolved binary stars in 47 Tucanae
Rubin Data Preview 1: Extending the view of unresolved binary stars in 47 Tucanae Open
Until now, the study of unresolved main-sequence binary stars in globular clusters has been possible almost exclusively in their central regions with deep Hubble Space Telescope (HST) observations. We present the first detection of unresol…
View article: The rise of the Milky Way Disk through EMP stars
The rise of the Milky Way Disk through EMP stars Open
We present a chemo-dynamical study conducted with 2dF $+$ AAOmega of $\sim 6\,000$ Gaia DR3 non-variable candidate metal-poor stars that lie in the direction of the Galactic plane. Our spectral analysis reveals 15 new extremely metal-poor …
View article: Spectrophotometry and radial distribution of multiple stellar populations in globular clusters from <i>Gaia</i> XP spectra
Spectrophotometry and radial distribution of multiple stellar populations in globular clusters from <i>Gaia</i> XP spectra Open
Understanding the formation of multiple populations in globular clusters (GCs) represents a challenge for stellar population studies. Nevertheless, the outermost cluster regions, likely to hold clues about the initial configuration of GC s…
View article: <i>Hubble</i> Space Telescope survey of Magellanic Cloud star clusters. Binaries among the split main sequences of NGC 1818, NGC 1850, and NGC 2164
<i>Hubble</i> Space Telescope survey of Magellanic Cloud star clusters. Binaries among the split main sequences of NGC 1818, NGC 1850, and NGC 2164 Open
Nearly all star clusters younger than ~600 Myr exhibit extended main sequence turnoffs and split main sequences (MSs) in their color-magnitude diagrams. Works based on both photometry and spectroscopy have clearly demonstrated that the red…
View article: Hubble Space Telescope survey of Magellanic Cloud star clusters. Binaries among the split main sequences of NGC 1818, NGC 1850, and NGC 2164
Hubble Space Telescope survey of Magellanic Cloud star clusters. Binaries among the split main sequences of NGC 1818, NGC 1850, and NGC 2164 Open
Nearly all star clusters younger than ~600 Myr exhibit extended main sequence turn offs and split main sequences (MSs) in their color-magnitude diagrams. Works based on both photometry and spectroscopy have firmly demonstrated that the red…
View article: Internal Dynamics of Multiple Populations in 28 Galactic Globular Clusters: A Wide-Field study with Gaia and the Hubble Space Telescope
Internal Dynamics of Multiple Populations in 28 Galactic Globular Clusters: A Wide-Field study with Gaia and the Hubble Space Telescope Open
We present a detailed analysis of the internal dynamics of multiple stellar populations (MPs) in 28 Galactic Globular Clusters (GCs) across a wide field of view, extending from the innermost regions to the clusters' outskirts. Using astro-…