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Abundance variations in the globular cluster M71 (NGC 6838)
(EDP SCIENCES S A, 2008)
Context. Abundance variations in moderately metal-rich globular clusters can give clues about the formation and chemical enrichment of globular clusters. Aims. CN, CH, Na, Mg and Al indices in spectra of 89 stars of the ...
Constraints on helium enhancement in the globular cluster m4 (NGC 6121): the horizontal branch test
(American Astronomical Society, 2020)
Different sodium enhancements among multiple populations of Milky Way globular clusters
(EDP Sciences, 2020-11)
We searched for clues to understand the different Na abundances measured in first and second generation stars of ancient Milky Way globular clusters. For that purpose, from the recent literature, we gathered the aforementioned ...
Searching For Extra-Tidal Stars Around Globular Clusters
(2004)
Globular Clusters around the Milky Way are thought to be undergoing destruction due to both evaporation and tidal stripping. We search for evidence of escaping stars around ten globular clusters. Our strategy is to distinguish ...
Variable stars in the VVV globular clusters. I. 2MASS-GC 02 and Terzan 10
(Institute of Physics Publishing, 2015-03)
The VISTA Variables in the Vía Láctea (VVV) ESO Public Survey is opening a new window to study inner Galactic globular clusters (GCs) using their variable stars. These GCs have been neglected in the past due to the ...
Completing the census of (bright) variable stars in galactic globular clusters
(2006)
We present a long-term project aimed at completing the census of (bright) variable stars in Galactic globular clusters. While our main aim is to obtain a reliable assessment of the populations of RR Lyrae and type II Cepheid ...
Search for extra-tidal RR Lyrae stars in Milky Way globular clusters from Gaia DR2
(Oxford University Press, 2019-02)
We used extra-tidal RR Lyrae stars to study the dynamics of Galactic globular clusters and know how effects like dynamical friction and tidal disruption affect these clusters. The Gaia DR2 catalogue for RR Lyrae stars ...
Helium abundance difference within globular clusters: NGC 2808
(Societa Astronomica Italiana, 2015-01)
Multiple populations have been recently detected in most Galactic globular clusters,
even with no significant spread in metallicity. Unusual features of the observed colourmagnitude diagrams can be explained by differences ...