Stellar Evolution in Ngc 6791 : Mass Loss on the Red Giant Branch and the Formation of Low Mass White Dwarfs

@inproceedings{Kalirai2008StellarEI,
  title={Stellar Evolution in Ngc 6791 : Mass Loss on the Red Giant Branch and the Formation of Low Mass White Dwarfs},
  author={Jasonjot Singh Kalirai and Pierre Bergeron and Brad M. S. Hansen and Daniel D. Kelson and David B. Reitzel and R. Michael Rich and Harvey B. Richer},
  year={2008}
}
We present the first detailed study of the properties (temperatures, gravities, and masses) of the NGC 6791 white dwarf population. This unique stellar system is both one of the oldest (8 Gyr) and most metal-rich ([Fe/H] ∼ +0.4) open clusters in our Galaxy, and has a color-magnitude diagram (CMD) that exhibits both a red giant clump and a much hotter extreme horizontal branch. Fitting the Balmer lines of the white dwarfs in the cluster, using Keck/LRIS spectra, suggests that most of these stars… CONTINUE READING

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Chemical evolution of star clusters.

Philosophical transactions. Series A, Mathematical, physical, and engineering sciences • 2010
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