Near-Infrared photometry of the Galactic Globular Cluster NGC 6441
Abstract
We present new near-infrared Ks photometry of the interesting Galactic globular cluster NGC 6441. The optical-NIR color-magnitude diagram shows evolutionary features that seem to agree with a canonical evolutionary framework. The K-band Period-Luminosity-Metallicity relation of RR Lyrae stars gives a distance estimate of 15.51±0.07 that is slightly larger previous estimates.
- Publication:
-
Stellar Populations as Building Blocks of Galaxies
- Pub Date:
- August 2007
- DOI:
- Bibcode:
- 2007IAUS..241..241D
- Keywords:
-
- (Galaxy:) globular clusters: individual (NGC 6441);
- stars: horizontal-branch;
- stars: variables: other;
- techniques: photometric