K-band magnitude of the red clump as a distance indicator

Details K-band magnitude of the red clump as a distance indicator K-band magnitude of the red clump as a distance indicator

Feb 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007a%26a...463..559v&link_type=abstract

Astronomy and Astrophysics, Volume 463, Issue 2, February IV 2007, pp.559-565

Astronomy and Astrophysics

Astrophysics

10

Open Clusters And Associations: General, Stars: Horizontal-Branch, Stars: Distances

Scientific paper

We have investigated how the K-band magnitude of the red clump [M_K(RC)] depends on age and metallicity, using 2MASS infrared data for a sample of 24 open clusters with known distances. We show that a constant value of M_K(RC)=-1.57 ± 0.05 is a reasonable assumption to use in distance determinations for clusters with metallicity between -0.5 and +0.4 dex and age between 108.5 and 109.9 years.
Figures 8 and 9 are available in electronic form at http://www.aanda.org

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