Astronomy and Astrophysics – Astrophysics – Galaxy Astrophysics
Scientific paper
2011-09-29
Astronomy and Astrophysics
Astrophysics
Galaxy Astrophysics
23 pages, including 7 figures and 4 tables, accepted for publication in MNRAS
Scientific paper
We investigate radial metallicity gradients for a sample of dwarf stars from the RAdial Velocity Experiment (RAVE) Data Release 3 (DR3). We select a total of approximately 17000 F-type and G-type dwarfs using selection of colour, log g, and uncertainty on derived space motion, calculate for each star a probabilistic (kinematic) population assignment to thick or thin disc using space motion, and additionally another (dynamical) assignment using stellar vertical orbital eccentricity. We additionally subsample by colour, to provide samples biased to young thin disc and to older thin disc stars. We derive a metallicity gradient as a function of Galactocentric radial distance, i.e. d[M/H]/dR_m=-0.051+/-0.005 dex kpc^-1, for the youngest sample, F-type stars with vertical orbital eccentricities e_V<=0.04. Samples biased to older thin disc stars show systematically shallower abundance gradients.
Ak S.
Bilir Selcuk
Coskunoglu B.
Gilmore Gerard
Karaali Salih
No associations
LandOfFree
Local stellar kinematics from RAVE data: II. Radial Metallicity Gradient does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Local stellar kinematics from RAVE data: II. Radial Metallicity Gradient, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Local stellar kinematics from RAVE data: II. Radial Metallicity Gradient will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-151969