Coskunoglu, B;
Ak, S;
Bilir, S;
Karaali, S;
Onal, O;
Yaz, E;
Gilmore, G;
(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.
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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.
| Type: | Article |
|---|---|
| Title: | Local stellar kinematics from RAVE data - II. Radial metallicity gradient |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1111/j.1365-2966.2011.19925.x |
| Publisher version: | https://doi.org/10.1111/j.1365-2966.2011.19925.x |
| Language: | English |
| Additional information: | This version is the version of record. For information on re-use, please refer to the publisher’s terms and conditions. |
| Keywords: | stars: abundances, Galaxy: abundances, Galaxy: disc, Galaxy: evolution |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Space and Climate Physics |
| URI: | https://discovery.ucl.ac.uk/id/eprint/10090657 |
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