Ciucă, I;
Kawata, D;
Lin, J;
Casagrande, L;
Seabroke, G;
Cropper, M;
(2018)
The vertical metallicity gradients of mono-age stellar populations in the Milky Way with the RAVE and Gaia data.
Monthly Notices of the Royal Astronomical Society
, 475
(1)
pp. 1203-1212.
10.1093/mnras/stx3285.
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Abstract
We investigate the vertical metallicity gradients of five mono-age stellar populations between 0 and 11 Gyr for a sample of 18 435 dwarf stars selected from the cross-matched Tycho-Gaia Astrometric Solution and Radial Velocity Experiment (RAVE) Data Release 5. We find a correlation between the vertical metallicity gradients and age, with no vertical metallicity gradient in the youngest population and an increasingly steeper negative vertical metallicity gradient for the older stellar populations. The metallicity at disc plane remains almost constant between 2 and 8 Gyr, and it becomes significantly lower for the 8 < t ≤ 11 Gyr population. The current analysis also reveals that the intrinsic dispersion in metallicity increases steadily with age.We discuss that our results are consistent with a scenario that (thin) disc stars formed from a flaring (thin) star-forming disc.
| Type: | Article |
|---|---|
| Title: | The vertical metallicity gradients of mono-age stellar populations in the Milky Way with the RAVE and Gaia data |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1093/mnras/stx3285 |
| Publisher version: | https://doi.org/10.1093/mnras/stx3285 |
| Language: | English |
| Additional information: | This is the published version of record. For information on re-use, please refer to the publisher’s terms and conditions. |
| Keywords: | Galaxy: abundances; Galaxy: disc; Galaxy: evolution; Galaxy: formation |
| 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/10043573 |
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