Spectral analysis of red clump giants and the research on using them as the standard candles in I and K band

Details Spectral analysis of red clump giants and the research on using them as the standard candles in I and K band Spectral analysis of red clump giants and the research on using them as the standard candles in I and K band

Aug 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004acasn..45..253l&link_type=abstract

Acta Astronomica Sinica, vol. 45, no. 3, p. 253-265

Astronomy and Astrophysics

Astronomy

Red Clump Giants, Stars: Atmospheres, Stars: Abundances

Scientific paper

Based on high resolution, high signal-to-noise ratio spectra, we present 19 red clump giants' model parameters, and analysed four ? 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 ? element abundances 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.

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