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I. K. Shelton (Subaru telescope, NAOJ)
High dispersion spectroscopy in the near-ultraviolet using a large ground-based telescope offers a means of directly intercomparing relative abundances of the CNO elements in F, G and K-type stars over a wide range of luminosity and metallicity.
Preliminary results are presented for a sequence of moderate to very metal-poor G and K-type stars observed in the wavelength range of 3080-4750 A using the High Dispersion Spectrograph (HDS) on Subaru Telescope in a study of the relative abundances of CNO-cycle elements for the carbon-peculiar subgiants first reported in Koktay & Garrison (2000). The OH lines at 3085-3150 A, NH at 3360 A and CH lines at ~4300 A are detected with a S/N >100, >200 and >600, respectively, at R = 90,000.
Based on data collected at Subaru Telescope, which is operated by the National Astronomical Observatory of Japan.
The author(s) of this abstract have provided an email address for comments about the abstract: shelton@SubaruTelescope.org