Absolute Magnitude Calibration for Red Clump Stars

Abstract

We combined the ($K_s$, $J-K_s$) data in Laney et al. (2012) with the $V$ apparent magnitudes and trigonometric parallaxes taken from the Hipparcos catalogue and used them to fit the $M_{K_s}$ absolute magnitude to a linear polynomial in terms of $V-K_s$ colour. The mean and standard deviation of the absolute magnitude residuals, -0.001 and 0.195 mag, respectively, estimated for 224 red clump stars in Laney et al. 2012 are (absolutely) smaller than the corresponding ones estimated by the procedure which adopts a mean $M_{K_s}=-1.613$ mag absolute magnitude for all red clump stars, -0.053 and 0.218 mag, respectively. The statistics estimated by applying the linear equation to the data of 282 red clump stars in Alves (2000) are larger, $\Delta M_{K_s}=0.209$ and $\sigma =0.524$ mag, which can be explained by a different absolute magnitude trend, i.e. condensation along a horizontal distribution.

11 pages, 5 figures and 3 tables, accepted for publication in Astrophysics and Space Science

References in corpus (9)

• Tracing the long bar with red-clump giants
• The long Galactic bar as seen by UKIDSS Galactic Plane Survey
• The red clump absolute magnitude based on revised Hipparcos parallaxes
• A new LMC K-band distance from precision measurements of nearby red clump stars
• Local stellar kinematics from RAVE data: III. Radial and Vertical Metallicity Gradients based on Red Clump Stars
• Estimation of Galactic model parameters in high latitudes with 2MASS
• Luminosity-Colour Relations 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)
• Absolute Magnitude Calibration for Red Giants based on the Colour-Magnitude Diagrams of Galactic Clusters. III-Calibration with 2MASS

Cited by in corpus (6)

• A comprehensive study of the open cluster NGC 6866
• Absolute Magnitudes of Seismic Red Clumps in the Kepler Field and SAGA: the age dependency of the distance scale
• CCD UBV photometry of the open cluster NGC 6819
• Multiwavelength Absolute Magnitudes and Colours of Red Clump Stars in {\it Gaia} Era
• Using Red Clump Stars to Decompose the Galactic Magnetic Field with Distance
• Solar Space Density of the Red Clump Stars and the Scale-length of the Thin Disc