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The Gaia-ESO Survey: an extremely Li-rich giant in the globular cluster NGC1261
(European Southern Observatory, 2020)
Lithium-rich stars in globular clusters are rare. Only 14 have been found so far, in different evolutionary phases from dwarfs to giants. Different mechanisms have been proposed to explain this enhancement, but it is still ...
Lithium abundance in lower red giant branch stars of Omega Centauri
(EDP Sciences, 2018-10)
We present Li, Na, Al, and Fe abundances of 199 lower red giant branch star members of the stellar system Omega Centauri, using high-resolution spectra acquired with FLAMES at the Very Large Telescope. The A(Li) distribution ...
A relationship between iron spread and variability in giant stars of globular clusters = Una relación entre dispersión de hierro y variabilidad en estrellas gigantes de cúmulos globulares.
(Universidad de Concepción.Facultad de Ciencias Físicas y MatemáticasDepartamento de Astronomía., 2020)
The work presented here is the results from an analysis of 34 light curves, 17 in the
V filter and 17 in the I filter of 17 giant stars of NGC 3201, spanning 4 nights of
observation carried out on March 20-23, 2013.
The ...
The first Δa observations of three globular clusters
(Wiley Blackwell Publishing, Inc, 2014-09)
Globular clusters are main astrophysical laboratories to test and modify evolutionary models. Thought to be rather homogeneous in their local elemental distribution of members, results suggest a wide variety of chemical ...
Strömgren metallicities for intermediate-age and old star clusters
(EDP Sciences, 2020-10)
We report results that show that the straightforward star cluster metallicities obtained from Strömgren vby photometry are age-dependent and need to be corrected for further use. This outcome arises from the comparison of ...