BVI of NGC 5466 red giants and blue stragglers

We have detected the red giant branch bump for the first time, although it is at least 0.2mag fainter than expected relative to the turnoff. The number of red giants (relative to main-sequence turnoff stars) is in excellent agreement with stellar models from the Yonsei-Yale and Teramo groups, and slightly high compared to Victoria-Regina models.

This adds to evidence that an abnormally large ratio of red giant to main-sequence stars is not correlated with cluster metallicity.