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.

Deep NIR photometry of the globular 47Tuc

DEGL'INNOCENTI, SCILLA;PRADA MORONI, PIER GIORGIO;
2010

Abstract

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.
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11568/202112
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