Iron and Alpha in Individual Red Giant Stars from Medium Resolution Spectra

Details Iron and Alpha in Individual Red Giant Stars from Medium Resolution Spectra Iron and Alpha in Individual Red Giant Stars from Medium Resolution Spectra

Oct 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008aspc..399..467k&link_type=abstract

Panoramic Views of Galaxy Formation and Evolution ASP Conference Series, Vol. 399, proceedings of the conference held 11-16 Dece

Astronomy and Astrophysics

Astronomy

Scientific paper

We present a technique to measure [Fe/H] and [α/Fe] from individual iron and alpha element lines in medium resolution spectra from the DEIMOS spectrometer (R ˜ 6 000) on the Keck II telescope. The moderate dispersion and multiplexing drastically increase the accessibility of halo and dSph stars not only in the Milky Way, but also M31. Using a grid of spectral syntheses of stellar atmospheres in local thermodynamic equilibrium, we have measured elemental abundances from the metal lines in DEIMOS spectra of individual red giant stars in well-studied Milky Way globular clusters. The abundances are consistent with high resolution studies over a wide range of [Fe/H].

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