Kinematic trends in young and old stars
Abstract
Using RAVE DR5, we explore the age, kinematic, and chemical correlations of a sample of 30,000 FGK stars. We separate a sample of turnoff stars into two age groups: young and old. For each of the two age groups, we calculate kinematic trends as a function of Galactocentric radius (R), for different metallicity ([Fe/H]) bins. For both young and old stars, we measure a negative gradient in ∂<VR>/∂R. In addition, for young stars we find a correlation between the magnitude of the slope and metallicity, with the most metal-rich bins having the steepest gradient and the most metal-poor bins having a flatter trend.
- Publication:
-
Rediscovering Our Galaxy
- Pub Date:
- August 2018
- DOI:
- 10.1017/S1743921317006913
- Bibcode:
- 2018IAUS..334..385W
- Keywords:
-
- stars: ages;
- stars: abundances;
- stars: kinematics