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The White Dwarf Cooling Sequence of NGC6397
Brad M. S. Hansen, Jay Anderson, James Brewer +10
We present the results of a deep Hubble Space Telescope (HST) exposure of the nearby globular cluster NGC6397, focussing attention on the cluster's white dwarf cooling sequence. Th…
Probing the Faintest Stars in a Globular Star Cluster
Harvey B. Richer, Jay Anderson, James Brewer +10
NGC 6397 is the second closest globular star cluster to the Sun. Using 5 days of time on the Hubble Space Telescope, we have constructed the deepest ever color-magnitude diagram fo…
The Space Motion of the Globular Cluster NGC 6397
Jasonjot S. Kalirai, Jay Anderson, Harvey B. Richer +12
As a by-product of high-precision, ultra-deep stellar photometry in the Galactic globular cluster NGC 6397 with the Hubble Space Telescope, we are able to measure a large populatio…