The open cluster NGC 6791 is now considered both the oldest and the most metal-rich known. Its age is 8 -10 Gyrs, twice as old as the canonical solar-metallicity cluster M67 (Garnavich et al. 1994; Demarque, Green, & Guenther 1992; Tripicco et al. 1995). That its metallicity is significantly above solar is suggested from moderate-resolution spectroscopy and from a mismatch of its color-magnitude diagram (CMD) with solar-metallicity isochrones. Tripicco et al. (1995) find Fe/H] = +0.27 to +0.44. The cluster population is rich. In addition to about a dozen red giants and two dozen red...
The open cluster NGC 6791 is now considered both the oldest and the most metal-rich known. Its age is 8 -10 Gyrs, twice as old as the canonical solar-...
This is the proceedings of the International Symposium on Origin of Matter and Evolution of Galaxies which was held near Tokyo, Japan, in November 2003. The meeting brought together many scientists from vast fields -- nuclear physics, particle physics, cosmic-ray physics, cosmology, astronomy, geophysics, and others -- to promote discussion and collaboration.
This is the proceedings of the International Symposium on Origin of Matter and Evolution of Galaxies which was held near Tokyo, Japan, in November 200...
