Bibcode
Troisi, L.; Bono, G.; Dall'Ora, M.; Calamida, A.; Di Cecco, A.; Iannicola, G.; Sanna, N.; Stetson, P. B.; Buonanno, R.; Caputo, F.; Corsi, C. E.; Degl'Innocenti, S.; Ferraro, I.; Nonino, M.; Monelli, M.; Prada Moroni, P. G.; Romaniello, M.; Walker, A. R.; Zoccali, M.
Referencia bibliográfica
Memorie della Società Astronomica Italiana Supplement, v.14, p.139 (2010)
Fecha de publicación:
0
2010
Número de citas
1
Número de citas referidas
1
Descripción
We performed accurate and deep NIR (J,K) photometry of the Globular
Cluster (GC) 47Tuc using data collected with SOFI at New Technology
Telescope (NTT) (ESO, La Silla). Data cover a significant fraction of
the innermost regions of the cluster and the Color Magnitude Diagram
(CMD) ranges from the red HB down to the lower Main Sequence (MS). In
the faint magnitude limit, we clearly detected the knee, along the MS,
caused by the Collision Induced Absorption. We found that this feature
is located at J˜ 18.45 and J-K˜ 0.68 mag.