Luminosity-colour relations for red clump stars

We calibrated the absolute magnitudes M _V , M _J , M_{K_s} and M _g of red clump stars in terms of colours. M _V and M _g are strongly dependent on colour, while the dependence of M _J and M_{K_s} on colour is rather weak. The calibration of the absolute magnitudes M _V and M_{K_s} is tested on 101 RC stars in the field SA 141. The Galactic model parameters estimated with this sample are in good agreement with earlier studies.