ИСТИНА

We use the UCAC4 and SDSS proper motions of about 7500 RR Lyrae type variables located within ∼ 10 kpc from the Sun to study the dependence of their velocity ellipsoid on Galactocentric distance in the RG = 3-17 kpc interval. The radial velocity dispersion, σVR, decreases from ∼ 190 km/s at RG =3.5–5.5 kpc down to ∼ 100 km/s at RG =13–15 kpc, and the σVT/σVR ratio remains virtually constant (σVT/σVR ∼ 0.54–0.64) in the Galactocentric distance interval from RG =4.5 kpc to RG =10.5 kpc increasing to ∼ 0.9 both toward the Galactic center and beyond RG =11 kpc.