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Proper-Motion Based Kinematics Study of Galactic RR Lyraesстатья
- Авторы: Dambis A.K., Berdnikov L.N., Rastorguev A.S., Zabolotskikh M.V.
- Сборник: Proceedings of the International Astronomical Union
- Серия: Symposium S317
- Том: 11
- Год издания: 2016
- Первая страница: 290
- Последняя страница: 291
- DOI: 10.1017/S1743921315007279
- Аннотация: 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 R G = 3–17 kpc interval. The radial velocity dispersion, σ VR , decreases from ~190 km/s at R G = 3.5–5.5 kpc down to ~100 km/s at R G = 13–15 kpc, and the σ VT /σ VR ratio remains virtually constant (σ VT /σ VR ~0.54–0.64) in the Galactocentric distance interval from R G = 4.5 kpc to R G = 10.5 kpc increasing to ~0.9 both toward the Galactic center and beyond R G = 11 kpc.
- Добавил в систему: Дамбис Андрей Карлович