81 citations · 83 across the 3 of their papers we have counts for
6 papers · 1 filter
Testing planet formation theories with Giant stars
Luca Pasquini, M. P. Doellinger, A. Hatzes +4
Planet searches around evolved giant stars are bringing new insights to planet formation theories by virtue of the broader stellar mass range of the host stars compared to the sola…
A Search for EHB Pulsators in the Globular Cluster NGC 6752
M. Catelan, G. E. Prieto, M. Zoccali +8
We describe the status of a project whose main goal is to detect variability along the extreme horizontal branch of the globular cluster NGC 6752. Based on Magellan 6.5m data, prel…
The circumstellar envelope of IRC+10216 from milli-arcsecond to arcmin scales
I. C. Leao, Patrick De Laverny, D. Mekarnia +2
Aims.Analysis of the innermost regions of the carbon-rich star IRC+10216 and of the outer layers of its circumstellar envelope have been performed in order to constrain its mass-lo…
Rotation and lithium in single giant stars
J. R. De Medeiros, J. D. do Nascimento, S. Sankarankutty +2
In the present work, we study the link between rotation and lithium abundance in giant stars of luminosity class III, on the basis of a large sample of single stars of spectral typ…
Ca II activity and rotation in F-K evolved stars
L. Pasquini, J. R. de Medeiros, L. Girardi
(Abridged) Ca II H and K high resolution observations for 60 evolved stars in the field and in 5 open clusters are presented. From these spectra chromospheric fluxes are derived, a…
Lithium and rotation on the subgiant branch II. Theoretical analysis of observations
J. D. do Nascimento, C. Charbonnel, A. Lebre +2
Lithium abundances and rotation, determined for 120 subgiant stars in Lebre et al. (1999) are analyzed. To this purpose, the evolutionary status of the sample as well as the indivi…