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Comparisons with Globular and Open Clusters - SSPP

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Comparison of [Fe/H] of cluster members between DR9 SSPP and literature

The following plots compare [Fe/H] of some globular and open cluster member stars derived by the DR9 version of the SSPP. The solid line indicates the literature value from high-resolution spectroscopic analysis, while the dashed line is ours. It shows how well the overall metallicity from the DR9 SSPP agrees with the literature, without any significant trend along g-r or S/N from very metal-poor cluster (M92 or M15) to very metal-rich open cluster (NGC 6791). This proves the very reliable estimate of [Fe/H] from the DR9 SSPP.

Comparing [Fe/H] to literature
Comparison of [Fe/H] to measurements in the literature (click to get a larger version)