Candidate red clump giants in the PPMX catalogue

Rybka, SP, 1Yatsenko, AI
1Main Astronomical Observatory of the National Academy of Sciences of Ukraine, Kyiv, Ukraine
Kinemat. fiz. nebesnyh tel (Online) 2011, 27(2):31-42
Start Page: Structure and Dynamics of the Galaxy
Language: eng
Abstract: 

We present the RCGP catalogue of more than 0.5 million candidate Red Clump giants brighter than Ks = 9.5m. These stars were selected from the PPMX catalogue as the most probable Red Clump members on color-reduced proper motion diagrams constructed from PPMX proper motions and 2MASS J,Ks-photometry. Based on the reddening of extracted stars, Ks-band extinction was determined and taken into account. Using the two-dimensional galactic rotation model generalised by Ogorodnikov, the tangential velocity field of the selected Red Clump members (most of them are thin disk stars) was investigated within 1.5 kpc from the Sun. The values of kinematic parameters and solar components were determined as a function of stellar heights above galactic equatorial plane and of heliocentric distances.

Keywords: galactic rotation model, kinematic parameters, PPMX catalogue, Red Clump giants