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Clear evidence for the presence of second-generation asymptotic giant branch stars in metal-poor Galactic globular clusters
D. A. Garcia-Hernandez, Sz. Meszaros, M. Monelli +5
Galactic globular clusters (GCs) are known to host multiple stellar populations: a first generation with a chemical pattern typical of halo field stars and a second generation (SG)…
IAU Commission 37 "Star Clusters and Associations" Legacy report
Giovanni Carraro, Richard de Grijs, Bruce Elmegreen +5
It is widely accepted that stars do not form in isolation but result from the fragmentation of molecular clouds, which in turn leads to star cluster formation. Over time, clusters…
Towards Precision Photometry with Extremely Large Telescopes: the Double Subgiant Branch of NGC 1851
P. Turri, A. W. McConnachie, P. B. Stetson +4
The Extremely Large Telescopes currently under construction have a collecting area that is an order of magnitude larger than the present largest optical telescopes. For seeing-limi…
Variable Stars in Local Group Galaxies. I: Tracing the Early Chemical Enrichment and Radial Gradients in the Sculptor dSph with RR Lyrae Stars
C. E. Martínez-Vázquez, M. Monelli, G. Bono +7
We identified and characterized the largest (536) RR Lyrae (RRL) sample in a Milky Way dSph satellite (Sculptor) based on optical photometry data collected over 24 years. The…
The ACS LCID Project: On the origin of dwarf galaxy types: a manifestation of the halo assembly bias?
C. Gallart, M. Monelli, L. Mayer +13
We discuss how knowledge of the whole evolutionary history of dwarf galaxies, including details on the early star formation events, can provide insight on the origin of the differe…
On the distance of the globular cluster M4 (NGC 6121) using RR Lyrae stars: II. Mid-infrared period-luminosity relations
J. R. Neeley, M. Marengo, G. Bono +12
New mid-infrared period-luminosity (PL) relations are presented for \rrl{} variables in the globular cluster M4 (NGC 6121). Accurate photometry was obtained for 37 \rrl{} variables…