227 citations · 1.6k across the 21 of their papers we have counts for
13 papers · 1 filter
The Gaia-ESO Survey: Chromospheric Emission, Accretion Properties, and Rotation in Velorum and Chamaeleon I
A. Frasca, K. Biazzo, A. C. Lanzafame +33
We use the fundamental parameters delivered by the GES consortium in the first internal data release to select the members of Vel and Cha I among the UVES and GIRAFFE spectrosc…
Gaia-ESO Survey: The analysis of high-resolution UVES spectra of FGK-type stars
R. Smiljanic, A. J. Korn, M. Bergemann +99
The Gaia-ESO Survey is obtaining high-quality spectroscopic data for about 10^5 stars using FLAMES at the VLT. UVES high-resolution spectra are being collected for about 5000 FGK-t…
A new solar fluorine abundance and a fluorine determination in the two open clusters M 67 and NGC 6404
E. Maiorca, H. Uitenbroek, S. Uttenthaler +3
We present a new determination of the solar fluorine abundance together with abundance measurements of fluorine in two Galactic open clusters. We analyzed a sunspot spectrum, obser…
The Gaia-ESO Survey: Properties of the intermediate age open cluster NGC 4815
E. D. Friel, P. Donati, A. Bragaglia +34
NGC 4815 is a populous ~500 Myr open cluster at a Galactocentric radius of 7 kpc observed in the first six months of the Gaia-ESO Survey. Located in the inner Galactic disk, NGC 48…
s-Processing in AGB Stars Revisited. I. Does the Main Component Constrain the Neutron Source in the 13C-Pocket?
O. Trippella, M. Busso, E. Maiorca +2
Slow neutron captures at A 85 are mainly guaranteed by the reaction 13C(,n)16O in AGB stars, requiring proton injections from the envelope. These were so far assumed to…
The Gaia-ESO Survey: Kinematic structure in the Gamma Velorum Cluster
R. D. Jeffries, R. J. Jackson, M. Cottaar +27
Context: A key science goal of the Gaia-ESO survey (GES) is to use the kinematics of low-mass stars in young clusters to probe their dynamical histories and how they populate the f…
AGB stars and presolar grains
M. Busso, O. Trippella, E. Maiorca +1
Among presolar materials recovered in meteorites, abundant SiC and AlO grains of AGB origins were found. They showed records of C, N, O, Al and s-element isotopi…
News on the s process from young open clusters
Enrico Maiorca, Laura Magrini, Maurizio Busso +3
Recent spectroscopic measurements in open clusters younger than the Sun, with [Fe/H]>=0, showed that the abundances of neutron-rich elements have continued to increase in the Galax…
Deep Mixing in Evolved Stars. II. Interpreting Li Abundances in RGB and AGB Stars
S. Palmerini, S. Cristallo, M. Busso +4
We reanalyze the problem of Li abundances in red giants of nearly solar metallicity. After an outline of the problems affecting our knowledge of the Li content in low-mass stars (M…
On the Need for Deep Mixing in AGB Stars of Low Mass
M. Busso, S. Palmerini, E. Maiorca +5
The photospheres of low-mass red giants show CNO isotopic abundances that are not satisfactorily accounted for by canonical stellar models. The same is true for the measurements of…
The Solar Photospheric Nitrogen Abundance: Determination with 3D and 1D Model Atmospheres
E. Maiorca, E. Caffau, P. Bonifacio +5
We present a new determination of the solar nitrogen abundance making use of 3D hydrodynamical modelling of the solar photosphere, which is more physically motivated than tradition…
Nucleosynthesis of light element isotopes in evolved stars experiencing extended mixing
S. Palmerini, M. Busso, E. Maiorca +1
We present computations of nucleosynthesis in red giants and asymptotic giant branch stars of Population I experiencing extended mixing. The assumed physical cause for mass transpo…
The solar photospheric nitrogen abundance. Analysis of atomic transitions with 3D and 1D model atmospheres
E. Caffau, E. Maiorca, P. Bonifacio +5
CONTEXT: In recent years, the solar chemical abundances have been studied in considerable detail because of discrepant values of solar metallicity inferred from different indicator…