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Kovtyukh, V V; Andrievsky, S M; Martin, R P; Korotin, S A; Lepine, J R D; Maciel, W J; Keir, L E; Panko, E A
Monthly notices of the Royal Astronomical Society, 10/2019, Letnik: 489, Številka: 2Journal Article
ABSTRACT We have made the first attempt to derive the chemical properties of the Galactic disc at its very central part using high-resolution infrared spectroscopic observations of four classical Cepheids. These stars are located at Galactocentric distances smaller than 1 kpc. All investigated stars show near-to-solar elemental abundances. By combining these new data with our previous studies, our results suggest that the radial distribution of iron abundance on a logarithmic scale gradually increases from the outskirts of the Galactic disc to Galactocentric distances of about 2–4 kpc. There, it reaches a maximal value of about +0.4 dex, and then declines sharply to about the solar value at the Galactic Centre.
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JCR | SNIP | JCR | SNIP | JCR | SNIP | JCR | SNIP |
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