K-Band Calibration of the Red Clump Luminosity

  title={K-Band Calibration of the Red Clump Luminosity},
  author={David Randall Alves},
  journal={The Astrophysical Journal},
  pages={732 - 741}
  • D. Alves
  • Published 22 March 2000
  • Physics
  • The Astrophysical Journal
The average near-infrared (K-band) luminosity of 238 Hipparcos red clump giants is derived and then used to measure the distance to the Galactic center. These Hipparcos red clump giants have been previously employed as I-band standard candles. The advantage of the K-band is a decreased sensitivity to reddening and perhaps a reduced systematic dependence on metallicity. In order to investigate the latter, and also to refer our calibration to a known metallicity zero point, we restrict our sample… 

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