284 citations · 6.1k across the 137 of their papers we have counts for
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NGC 2419, M92, and the Age Gradient in the Galactic Halo
W. E. Harris, R. A. Bell, D. A. VandenBerg +7
The WFPC2 camera on HST has been used to obtain deep main sequence photometry of the low-metallicity ([Fe/H]=-2.14), outer-halo globular cluster NGC 2419. A differential fit of the…
White Dwarfs in Globular Clusters: HST Observations of M4
Harvey B. Richer, Gregory G. Fahlman, Rodrigo A. Ibata +11
Using WFPC2 on the Hubble Space Telescope, we have isolated a sample of 258 white dwarfs (WDs) in the Galactic globular cluster M4. Fields at three radial distances from the cluste…
Post-AGB Stars as Standard Extragalactic Candles
Howard E. Bond
Stars evolving off the asymptotic giant branch and passing through spectral types F and A are excellent candidates for a new extragalactic candle. These post-AGB (PAGB) stars are t…