4 papers · 1 filter
Solar twins in M67
L. Pasquini, K. Biazzo, P. Bonifacio +2
The discovery of true solar analogues is fundamental for a better understanding of the Sun and of the solar system. The open cluster M67 offers a unique opportunity to search for s…
N in turn-off stars of NGC 6397 and NGC 6752
L. Pasquini, A. Ecuvillon, P. Bonifacio +1
We measure the nitrogen abundance in 5 Turn Off(TO) stars of the Globular Clusters NGC 6397 and NGC 6752, and compare the cluster abundances with those of field stars of comparable…
UVES observations of the Canis Major overdensity
L. Sbordone, P. Bonifacio, G. Marconi +2
We present the first detailed chemical abundances for three giant stars which are candidate members of the Canis Major overdensity, obtained by using FLAMES-UVES at VLT. The stars,…
Beryllium in turnoff stars of NGC6397: early Galaxy spallation, cosmochronology and cluster formation
L. Pasquini, P. Bonifacio, S. Randich +2
We present the first detection of beryllium in two turnoff stars of the old, metal-poor globular cluster NGC 6397. The beryllium lines are clearly detected and we determine a mean…