113 citations · 885 across the 31 of their papers we have counts for
21 papers · 1 filter
Evidence for elemental diffusion in the eclipsing binary star AI Phoenicis
Pierre F. L. Maxted, Nicholas Storm, Andreas J. Korn +7
AI Phe is an eclipsing binary star with an orbital period of 24.6 days for which the surface gravity and effective temperature are known from direct measurements to very high preci…
A JWST project on 47 Tucanae. NIRSpec spectroscopy of multiple populations among M dwarfs
A. F. Marino, A. P. Milone, A. Renzini +12
We present the first spectroscopic estimates of the chemical abundance of M dwarf stars in a globular cluster (GC), namely 47 Tucanae. By exploiting NIRSpec on board the James Webb…
A JWST project on 47 Tucanae. Overview, photometry and early spectroscopic results of M dwarfs, and observation of brown dwarfs
A. F. Marino, A. P. Milone, M. V. Legnardi +14
The James Webb Space Telescope (JWST) observations have been demonstrated to be efficient in detecting globular clusters' (GCs) multiple stellar populations in the low mass regime…
Photometric Binaries in 14 Magellanic Cloud Star Clusters
Anjana Mohandasan, Antonino P. Milone, Giacomo Cordoni +7
Binary stars play a major role in determining the dynamic evolution of star clusters. We used images collected with the Hubble Space Telescope to study fourteen Magellanic Clouds s…
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…
Multiple Stellar Populations in Globular Clusters with JWST: a NIRCam view of 47 Tucanae
A. P. Milone, A. F. Marino, A. Dotter +11
We use images collected with the near-infrared camera (NIRCam) on board the James Webb Space Telescope and with the Hubble Space Telescope (HST) to investigate multiple populations…
Hubble Space Telescope survey of Magellanic Cloud star clusters. Photometry and astrometry of 113 clusters and early results
A. P. Milone, G. Cordoni, A. F. Marino +29
In the past years, we have undertaken an extensive investigation of LMC and SMC star clusters based on HST data. We present photometry and astrometry of stars in 101 fields observe…
NGC1818 unveils the origin of the extended main-sequence turn-off in young Magellanic Clouds clusters
Giacomo Cordoni, Antonino P. Milone, Anna F. Marino +8
The origin of young star clusters represents a major challenge for modern stellar astrophysics. While stellar rotation partially explains the colour spread observed along main-sequ…
Survey of multiple populations in globular clusters among very low-mass stars
E. Dondoglio, A. P. Milone, A. Renzini +14
Recent work has shown that NIR Hubble Space Telescope (HST) photometry allows us to disentangle multiple populations (MPs) among M dwarfs of globular clusters (GCs) and investigate…
Chemical evidence for planetary ingestion in a quarter of Sun-like stars
Lorenzo Spina, Parth Sharma, Jorge Meléndez +5
Stellar members of binary systems are formed from the same material, therefore they should be chemically identical. However, recent high-precision studies have unveiled chemical di…
Spectroscopy and photometry of the least-massive Type-II globular clusters: NGC1261 AND NGC6934
A. F. Marino, A. P. Milone, A. Renzini +10
Recent work has revealed two classes of Globular Clusters (GCs), dubbed Type-I and Type-II. Type-II GCs are characterized by a blue- and a red- red giant branch composed of stars w…
Mass loss law for red giant stars in simple population globular clusters
M. Tailo, A. P. Milone, E. P. Lagioia +12
The amount of mass lost by stars during the red-giant branch (RGB) phase is one of the main parameters to understand and correctly model the late stages of stellar evolution. Never…
Multiple stellar populations in Asymptotic Giant Branch stars of Galactic Globular Clusters
E. P. Lagioia, A. P. Milone, A. F. Marino +8
Multiple stellar populations (MPs) are a distinct characteristic of Globular Clusters (GCs). Their general properties have been widely studied among main sequence, red giant branch…
A chromosome map to unveil stellar populations with different magnesium abundances. The case of Omega Centauri
A. P. Milone, A. F. Marino, A. Renzini +7
Historically, photometry has been largely used to identify stellar populations (MPs) in Globular Clusters (GCs) by using diagrams that are based on colours and magnitudes that are…
Li abundances for solar twins in the open cluster M67
Marilia Carlos, Jorge Melendez, Jose-Dias do Nascimento +1
We determine lithium (Li) abundances for solar twins in the M67 open cluster to add valuable information about the correlation between Li depletion and stellar age and, then, bette…
The effect of stellar activity on the spectroscopic stellar parameters of the young solar twin HIP 36515
Jhon Yana Galarza, Jorge Meléndez, Diego Lorenzo-Oliveira +7
Spectroscopic equilibrium allows us to obtain precise stellar parameters in Sun-like stars. It relies on the assumption of the iron excitation and ionization equilibrium. However,…
The Li-age correlation: the Sun is unusually Li deficient for its age
M. Carlos, J. Melendez, L. Spina +8
The present work aims to examine in detail the depletion of lithium in solar twins to better constrain stellar evolution models and investigate its possible connection with exoplan…
A formation timescale of the Galactic halo from Mg isotopes in dwarf stars
Marilia Carlos, Amanda I. Karakas, Judith G. Cohen +2
We determine magnesium isotopic abundances of metal poor dwarf stars from the galactic halo, to shed light on the onset of asymptotic giant branch (AGB) star nucleossynthesis in th…
Heavy-element yields and abundances of Asymptotic Giant Branch models with a Small Magellanic Cloud metallicity
Amanda Karakas, Maria Lugaro, Marília Carlos +3
We present new theoretical stellar yields and surface abundances for asymptotic giant branch (AGB) models with a metallicity appropriate for stars in the Small Magellanic Cloud (SM…
The chemical compositions of solar twins in the open cluster M67
F. Liu, M. Asplund, D. Yong +5
Stars in open clusters are expected to share an identical abundance pattern. Establishing the level of chemical homogeneity in a given open cluster deserves further study as it is…
Correlation between lithium abundances and ages of solar twin stars
Marilia Carlos, Poul E. Nissen, Jorge Melendez
We want to determine the lithium abundances of solar twin stars as a function of stellar age to provide constraints for stellar evolutions models and to investigate whether there i…