Absolute Magnitude Calibration for Red Giants based on the Colour-Magnitude Diagrams of Galactic Clusters. III-Calibration with 2MASS

Abstract

We present two absolute magnitude calibrations, $M_J$ and $M_{K_s}$, for red giants with the colour magnitude diagrams of five Galactic clusters with different metallicities i.e. M92, M13, M71, M67, and NGC 6791. The combination of the absolute magnitudes of the red giant sequences with the corresponding metallicities provides calibration for absolute magnitude estimation for red giants for a given colour. The calibrations for $M_J$ and $M_{K_s}$ are defined in the colour intervals $1.3\le (V-J{)}_0\le 2.8$ and $1.75\le (V-K_s{)}_0\le 3.80$ mag, respectively, and they cover the metallicity interval $-2.15\le [Fe/H]\le +0.37$ dex. The absolute magnitude residuals obtained by the application of the procedure to another set of Galactic clusters lie in the intervals $-0.08<\Delta M_J\le +0.34$ and $-0.10<\Delta M_{K_s}\le +0.27$ mag for $M_J$ and $M_{K_s}$, respectively. The means and standard deviations of the residuals are $<\Delta M_J>=0.137$ and ${\sigma }_{M_J}=0.080$, and $<\Delta M_{K_s}>=0.109$ and ${\sigma }_{M_{K_s}}=0.123$ mag. The derived relations are applicable to stars older than 4 Gyr, the age of the youngest calibrating cluster.

20 pages, including 8 figures and 22 tables, accepted for publication in PASA. arXiv admin note: substantial text overlap with arXiv:1206.2752

References in corpus (5)

• The RAdial Velocity Experiment (RAVE): Third Data Release
• vbyCaHbeta CCD Photometry of Clusters. VIII. The Super-Metal Rich, Old Open Cluster NGC 6791
• Fiducial Stellar Population Sequences for the VJKs Photometric System
• Transformations between WISE and 2MASS, SDSS, BVI photometric systems: II. Transformation equations for red clump stars
• Absolute Magnitude Calibration for Red Giants based on the Colour-Magnitude Diagrams of Galactic Clusters. I- Calibration with V and (B-V)

Cited by in corpus (2)

• The GALAH Survey and Symbiotic Stars. I. Discovery and follow-up of 33 candidate accreting-only systems
• Absolute Magnitude Calibration for Red Clump Stars