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- W3102044114 abstract "Abstract We investigated the age–metallicity relation using a sample of 5691 F- and G-type dwarfs from RAdial Velocity Experiment Data Release 3 (RAVE DR3) by applying several constraints. (i) We selected stars with surface gravities log g (cm s −2 ) ≥ 3.8 and effective temperatures in the $5310le T_{text{eff}}text{(K)}le 7300$ range and obtained a dwarf sample. (ii) We plotted the dwarfs in metallicity sub-samples in the $T_{text{eff}}text{--}(J-K_s)_0$ plane to compare with the corresponding data of González Hernández & Bonifacio (2009) and identified the ones in agreement. (iii) We fitted the reduced dwarf sample obtained from constraints (i) and (ii) to the Padova isochrones and re-identified those which occupy the plane defined by isochrones with ages t ≤ 13 Gyr. (iv) Finally, we omitted dwarfs with total velocity errors larger than 10.63 km s −1 . We estimated the ages using the Bayesian procedure of Jørgensen & Lindegren (2005). The largest age–metallicity slope was found for early F-type dwarfs. We found steeper slopes when we plotted the data as a function of spectral type rather than Galactic population. We noticed a substantial scatter in metallicity distribution at all ages. The metal-rich old dwarfs turned out to be G-type stars which can be interpreted as they migrated from the inner disc or bulge." @default.
- W3102044114 created "2020-11-23" @default.
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- W3102044114 date "2013-08-08" @default.
- W3102044114 modified "2023-10-15" @default.
- W3102044114 title "Local Stellar Kinematics from RAVE Data: IV. Solar Neighbourhood Age–Metallicity Relation" @default.
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- W3102044114 doi "https://doi.org/10.1017/pasa.2013.21" @default.
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