61 citations · 382 across the 21 of their papers we have counts for
21 papers
He-enriched STAREVOL models for globular cluster multiple populations. Self-consistent isochrones from ZAMS to the TP-AGB phase
G. Costa, T. Dumont, A. Lançon +11
A common property of globular clusters (GC) is to host multiple populations characterized by peculiar chemical abundances. Recent photometric studies suggest that the He content co…
Extragalactic globular clusters with Euclid and other wide surveys
Ariane Lançon, S. Larsen, K. Voggel +14
Globular clusters play a role in many areas of astrophysics, ranging from stellar physics to cosmology. New ground-based optical surveys complemented by observations from space-bas…
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.…
On the maximum helium content of multiple populations in the globular cluster NGC6752
Fabrice Martins, William Chantereau, Corinne Charbonnel
Multiple populations in globular clusters are usually explained by the formation of stars out of material with a chemical composition that is polluted to different degrees by the e…
Searching for Multiple Populations in the Integrated Light of the Young and Extremely Massive Clusters in the Merger Remnant NGC~7252
Nate Bastian, Carmela Lardo, Christopher Usher +8
Recent work has shown that the properties of multiple populations within massive stellar clusters (i.e., in the extent of their abundance variations as well as the fraction of star…
Chromosome maps of young LMC clusters: An additional case of coeval multiple populations
S. Saracino, S. Martocchia, N. Bastian +9
Recent studies have revealed that the Multiple Populations (MPs) phenomenon does not occur only in ancient and massive Galactic globular clusters (GCs), but it is also observed in…
The loss of the intra-cluster medium in globular clusters
W. Chantereau, P. Biernacki, M. Martig +3
Stars in globular clusters (GCs) lose a non negligible amount of mass during their post-main sequence evolution. This material is then expected to build up a substantial intra-clus…
The evolution of intracluster medium in stellar clusters
William Chantereau
Stars in globular clusters lose mass through slow stellar winds that are retained by the stellar cluster and contribute to build up a non negligible intracluster medium over time.…
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…
HAYDN -- High-precision AsteroseismologY of DeNse stellar fields (ESA Voyage 2050 White Paper)
Andrea Miglio, Leo Girardi, Frank Grundahl +29
In the last decade, the Kepler and CoRoT space-photometry missions have demonstrated the potential of asteroseismology as a novel, versatile and powerful tool to perform exquisite…
The search for multiple populations in Magellanic Clouds clusters - V. Correlation between cluster age and abundance spreads
S. Martocchia, E. Dalessandro, C. Lardo +14
In our HST photometric survey, we have been searching for multiple stellar populations (MPs) in Magellanic Clouds (MCs) massive star clusters which span a significant range of ages…
Helium enrichment in intermediate-age Magellanic Clouds clusters: towards an ubiquity of multiple stellar populations?
W. Chantereau, M. Salaris, N. Bastian +1
Intermediate-age star clusters in the Magellanic Clouds harbour signatures of the multiple stellar populations long thought to be restricted to old globular clusters. We compare sy…
Women Scientists Who Made Nuclear Astrophysics
C. V. Hampton, M. Lugaro, P. Papakonstantinou +24
Female role models reduce the impact on women of stereotype threat, i.e., of being at risk of conforming to a negative stereotype about one's social, gender, or racial group. This…
Multiple populations within globular clusters in Early-type galaxies Exploring their effect on stellar initial mass function estimates
William Chantereau, Christopher Usher, Nate Bastian
It is now well-established that most (if not all) ancient globular clusters host multiple popula- tions, that are characterised by distinct chemical features such as helium abundan…
Sodium abundances of AGB and RGB stars in Galactic globular clusters II. Analysis and results of NGC 104, NGC 6121 and NGC 6809
Y. Wang, F. Primas, C. Charbonnel +4
We analyzed the high-resolution spectra of a large sample of AGB and RGB stars in the Galactic globular clusters (GCs) NGC 104, NGC 6121, and NGC 6809 obtained with FLAMES/GIRAFFE…
Evolution of long-lived globular cluster stars III. Effect of the initial helium spread on the position of stars in a synthetic Hertzsprung-Russell diagram
William Chantereau, Corinne Charbonnel, Georges Meynet
Context. Globular clusters host multiple populations of long-lived low-mass stars whose origin remains an open question. Several scenarios have been proposed to explain the associa…
Sodium abundances of AGB and RGB stars in galactic globular clusters I. Analysis and results of NGC 2808
Y. Wang, F. Primas, C. Charbonnel +4
Galactic globular clusters (GC) are known to have multiple stellar populations and be characterised by similar chemical features, e.g. O-Na anti-correlation. While second-populatio…
Evolution of long-lived globular cluster stars. II. Sodium abundance variations on the asymptotic giant branch as a function of globular cluster age and metallicity
C. Charbonnel, W. Chantereau
Long-lived stars in GCs exhibit chemical peculiarities with respect to their halo counterparts. In particular, Na-enriched stars are identified as belonging to a 2d stellar populat…
Evolution of long-lived globular cluster stars I. Grid of stellar models with helium enhancement at [Fe/H] = -1.75
William Chantereau, Corinne Charbonnel, Thibaut Decressin
Our understanding of the formation and early evolution of globular clusters (GCs) has been totally overthrown with the discovery of the peculiar chemical properties of their long-l…
Are there any first-generation stars in globular clusters today?
Corinne Charbonnel, William Chantereau, Martin Krause +2
Several models compete to explain the abundance properties of stellar populations in globular clusters. One of the main constraints is the present-day ratio of first- and second-ge…
Why the globular cluster NGC 6752 contains no sodium-rich second-generation AGB star
Corinne Charbonnel, William Chantereau, Thibaut Decressin +2
(Abridged) Globular clusters host multiple stellar populations showing different sodium enrichments. These various populations can be observed along the main sequence, red giant an…