Title: Spectral analysis of red clump giants and the research on using them as the standard candles in I and K band
Abstract: Based on high resolution, high signal-to-noise ratio spectra, we present 19 red clump giants' model parameters, and analyse four α element abundances (O , Mg , Ca , Si) of the sample stars. We discuss the relation between the iron abundances and the stellar atmosphere parameters and show how the α element aoundances change with the increasing metallicity. The absolute magnitudes in I and K bands of 58 red clump giants are computed and the relation between them and the metallicity are also showed. The results indicate that, relative to I band, the absolute magnitudes in K band have the reduced systematic dependence on metallicity. Finally, we compare our results with the theory model.
Publication Year: 2004
Publication Date: 2004-08-01
Language: en
Type: article
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