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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 ...
Red giants in open clusters. IX. NGC 2324, 2818, 3960 and 6259
(EDP Sciences, 2001-12)
We present accurate radial velocities and photoelectric UBV photometry for 73 and 57 red-giant candidates, respectively, in the intermediate-age open clusters NGC 2324, 2818, 3960 and 6259. These data confirm the membership ...
First stars XII. Abundances in extremely metal-poor turnoff stars, and comparison with the giants
(EDP SCIENCES S A, 2009)
Context. The detailed chemical abundances of extremely metal-poor (EMP) stars are key guides to understanding the early chemical evolution of the Galaxy. Most existing data, however, treat giant stars that may have experienced ...
Metallicities for six nearby open clusters from high-resolution spectra of giant stars [Fe/H] values for a planet search sample
(EDP SCIENCES S ALES ULIS CEDEX A, 2012)
We present a study of the stellar parameters and iron abundances of 18 giant stars in six open clusters. The analysis was based on high-resolution and high-S/N spectra obtained with the UVES spectrograph (VLT-UT2). The ...
SELECTED TOPICS IN THE EVOLUTION OF LOW-MASS STARSEPJ WEB OF CONFERENCES
(S/EDITORIAL, 2016)
A hot Saturn on an eccentric orbit around the giant star K2-132
(EDP Sciences, 2018)
Although the majority of radial velocity detected planets have been found orbiting solar-type stars, a fraction of them have been discovered around giant stars. These planetary systems have revealed different orbital ...
On the nature of rapidly rotating single evolved stars
(American Astronomical Society, 2020)
Fingering convection in red giants revisited
(Edp Sciences, 2014-10)
Context. Fingering (thermohaline) convection has been invoked for several years as a possible extra-mixing which could occur in red giant stars; it is due to the modification of the chemical composition induced by nuclear ...
THE PAN-PACIFIC PLANET SEARCH. VI. GIANT PLANETS ORBITING HD 86950 AND HD 222076
(IOP PUBLISHING LTD, 2017)
We report the detection of two new planets orbiting the K giants HD 86950 and HD 222076, based on precise radial velocities obtained with three instruments: AAT/UCLES, FEROS, and CHIRON. HD 86950b has a period of 1270 +/- ...