Elemental abundances in the center of the Galactic Nuclear Disc

Autor:	Kovtyukh, V. V., Andrievsky, S. M., Martin, R. P., Korotin, S. A., Lepine, J. R. D., Maciel, W. J., , L. E Keir, Panko, E. A.
Rok vydání:	2019
Předmět:	Astrophysics - Astrophysics of Galaxies
Druh dokumentu:	Working Paper
Popis:	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. Those 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, this result suggests 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, reaching there a maximal value of about +0.4 dex, and then declines sharply to about the solar value at the Galactic Center. Comment: 7 pages, 5 figures, accepted for publication in MNRAS
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/1909.00662 Zobrazit plný text záznamu View this record from Arxiv