Spectroscopy of Six Red Giants in the Draco Dwarf Spheroidal Galaxy

Details Spectroscopy of Six Red Giants in the Draco Dwarf Spheroidal Galaxy Spectroscopy of Six Red Giants in the Draco Dwarf Spheroidal Galaxy

Oct 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006pasp..118.1361s&link_type=abstract

The Publications of the Astronomical Society of the Pacific, Volume 118, Issue 848, pp. 1361-1372.

Astronomy and Astrophysics

Astronomy

4

Stars: Abundances, Galaxies: Dwarf, Galaxies: Individual: Name: Draco, Galaxies: Stellar Content

Scientific paper

Keck Observatory LRIS-B (Low Resolution Imaging Spectrometer) spectra are reported for six red giant stars in the Draco dwarf spheroidal galaxy and several comparison giants in the globular cluster M13. Indexes that quantify the strengths of the Ca II H and K lines, the λ3883 and λ4215 CN bands, and the λ4300 G band have been measured. These data confirm evidence of metallicity inhomogeneity within Draco obtained by previous authors. The four brightest giants in the sample have absolute magnitudes in the range -2.6The data presented herein were obtained at the W. M. Keck Observatory, which is operated as a scientific partnership among the California Institute of Technology, the University of California, and the National Aeronautics and Space Administration. The Observatory was made possible by the generous financial support of the W. M. Keck Foundation.

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