Iron abundance gradient in the Milky Way found by Genovali et al. (2013, 2014). The black line is the Galactic gradient (−0.06 dex kpc−1), green crosses are Cepheids studied in those papers, whereas black dots show data for other Cepheids from the literature used by these authors. Magenta triangles represent the young open clusters (<500 Ma) in the sample compiled by Netopil et al. (2016). Finally, the red circle is NGC 3105 and the blue one is NGC 6067. Both young clusters were analysed by our group with the same techniques. NGC 3105 falls well below the metallicity typically observed at its Galactocentric distance. All the values shown in this plot are rescaled to Genovali et al. (2014), i.e. R⊙ = 7.95 kpc and A(Fe) = 7.50.
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