The vertical metallicity gradients of mono-age stellar populations in the Milky Way with the RAVE and Gaia data
By I. Ciucua, Daisuke Kawata, Jane Lin, Luca Casagrande, G. Seabroke, M. Cropper. 2017
10 citations recorded by the source corpus.
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.
Subfields: Astronomy and Astrophysics
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Citations in the corpus
- Yule-Simpson’s paradox in Galactic Archaeology (2019, background): “Recently, Ciucǎ et al. (2018) found similar negative trends in the older populations in RAVE DR5 (Kunder et al. 2017) data, which to some degree may be the result of observational uncertainties.”
- Stellar ages and masses in the solar neighbourhood: Bayesian analysis using spectroscopy and Gaia DR1 parallaxes (2018, methodology): “Elli has also been used to compute ages for the RAVE sample (Kunder et al. 2017), see Ciucǎ et al. (2018).”
- Metallicity distributions of mono-age stellar populations of the Galactic disc from the LAMOST Galactic spectroscopic surveys (2018, background): “Ciucǎ et al. (2018) only minimise the observational selection bias induced by the various selection criteria by selecting a sample in a specific colour and magnitude range.”