Coskunoglu, B; Ak, S; Bilir, S; Karaali, S; Onal, O; Yaz, E; Gilmore, G; Coskunoglu, B; Ak, S; Bilir, S; Karaali, S; Onal, O; Yaz, E; Gilmore, G; Seabroke, GM; - view fewer (2012) Local stellar kinematics from RAVE data - II. Radial metallicity gradient. Monthly Notices of the Royal Astronomical Society , 419 (4) pp. 2844-2854. 10.1111/j.1365-2966.2011.19925.x.

Preview

Text Seabroke_mnras0419-2844.pdf - Published Version Download (3MB) | Preview

Abstract

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 17 000 F-type and G-type dwarfs, using a selection of colour, log g and uncertainty in the derived space motion, and calculate for each star a probabilistic (kinematic) population assignment to a 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 toward young thin-disc and older thin-disc stars. We derive a metallicity gradient as a function of Galactocentric radial distance, i.e. d[M/H]/dRm=−0.051 ± 0.005 dex kpc−1, for the youngest sample, F-type stars with vertical orbital eccentricities ev≤ 0.04. Samples biased toward older thin-disc stars show systematically shallower abundance gradients.

Download activity - last month

Export as CSVJSONXML

Download activity - last 12 months

Export as XMLCSVJSON

Downloads by country - last 12 months

Export as JSONCSVXML

Archive Staff Only

View Item