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2002MNRAS.337..332S - Mon. Not. R. Astron. Soc., 337, 332-340 (2002/November-3)
Population effects on the red giant clump absolute magnitude: the K band.
SALARIS M. and GIRARDI L.
Abstract (from CDS):
We provide data and equations that allow the determination of the K -band population correction ΔM RCK(the difference between the red clump brightness in the solar neighbourhood and in the population under scrutiny) for any generic stellar population. These data complement the results presented by Girardi & Salaris for the V - and I -band. We show how data from galactic open clusters consistently support our predicted ΔM RCV, Δ M RC_ I_and ΔM RCKvalues.
Multiband VIK population corrections for various galaxy systems are provided. They can be used in conjunction with the method devised by Alves et al., in order to derive simultaneously reddening and distance from the use of VIK observations of red clump stars. We have positively tested this technique on the Galactic globular cluster 47 Tuc, for which both an empirical parallax-based main-sequence-fitting distance and reddening estimates exist. We have also studied the case of using only V and I photometry, recovering consistent results for both reddening and distance. Application of this method to an OGLE-II field, and the results by Alves et al., confirm a Large Magellanic Cloud distance modulus of about 18.50, in agreement with the Hubble Space Telescope extragalactic distance scale zero-point.
Abstract Copyright: RAS
Journal keyword(s): Hertzsprung-Russell (HR) diagram - stars: horizontal branch - solar neighbourhood - Magellanic Clouds - galaxies: stellar content
Simbad objects: 11
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