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Evidence of AGB pollution in Galactic globular clusters from the Mg-Al anticorrelations observed by the APOGEE survey
P. Ventura, D. A. García--Hernández, F. Dell'Agli +8
We study the formation of multiple populations in globular clusters (GC), under the hypothesis that stars in the second generation formed from the winds of intermediate-mass stars,…
Chemical Abundances in a Sample of Red Giants in the Open Cluster NGC 2420 from APOGEE
Diogo Souto, Katia Cunha, Verne Smith +20
NGC 2420 is a 2 Gyr-old well-populated open cluster that lies about 2 kpc beyond the solar circle, in the general direction of the Galactic anti-center. Most previous abundan…
Studying the evolution of AGB stars in the Gaia epoch
M. Di Criscienzo, P. Ventura, D. A. Garcia-Hernandez +6
We present asymptotic giant branch (AGB) models of solar metallicity, to allow the interpretation of observations of Galactic AGB stars, whose distances should be soon available af…
Galactic Archaeology with asteroseismology and spectroscopy: Red giants observed by CoRoT and APOGEE
F. Anders, C. Chiappini, T. S. Rodrigues +42
With the advent of the space missions CoRoT and Kepler, it has become feasible to determine precise asteroseismic masses and ages for large samples of red-giant stars. In this pape…
A search for hydrogenated fullerenes in fullerene-containing planetary nebulae
J. J. Díaz-Luis, D. A. García-Hernández, A. Manchado +1
Detections of C60 and C70 fullerenes in planetary nebulae (PNe) of the Magellanic Clouds and of our own Galaxy have raised the idea that other forms of carbon such as hydrogenated…
On the nature of the most obscured C-rich AGB stars in the Magellanic Clouds
P. Ventura, A. I. Karakas, F. Dell'Agli +3
The stars in the Magellanic Clouds with the largest degree of obscuration are used to probe the highly uncertain physics of stars in the asymptotic giant branch (AGB) phase of evol…