The Optical Gravitational Lensing Experiment: Red Clump Stars as a Distance Indicator.

  title={The Optical Gravitational Lensing Experiment: Red Clump Stars as a Distance Indicator.},
  journal={The Astrophysical journal},
  volume={531 1},
  • Udalski
  • Published 8 October 1999
  • Physics
  • The Astrophysical journal
We present relation of the mean I-band brightness of red clump stars on metallicity. Red clump stars were proposed to be a very attractive standard candle for distance determination. The calibration is based on 284 nearby red giant stars whose high-quality spectra made it possible to determine accurate individual metal abundances. High-quality parallaxes (sigmapi&solm0;pi<10%) and photometry of these very bright stars come from Hipparcos measurements. Metallicity of the sample covers a large… 

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