On the metallicity gradient in the Galactic disk
On the metallicity gradient in the Galactic disk作者机构:Astronomical ObservatoryUral Federal UniversityEkaterinburgRussia
出 版 物:《Research in Astronomy and Astrophysics》 (天文和天体物理学研究(英文版))
年 卷 期:2020年第20卷第4期
页 面:123-128页
核心收录:
学科分类:07[理学] 070401[理学-天体物理] 0704[理学-天文学]
基 金:supported in part by the Ministry of Education and Science(the basic part of the State assignment RK No.AAAA-A17-117030310283-7) Act No.211 of the Government of the Russian Federation(No.02.A03.21.0006)
主 题:Galaxy:general Galaxy:disk (Galaxy:)open clusters and associations:general
摘 要:The problem of the chemical composition gradient in the Galactic disk is studied based on a sample of metallicity estimates of open star clusters,using Gaia DR2-improved distance estimates.A clearly non-monotonic variation was observed in the average metallicity of clusters with increasing Galactocentric *** can clearly see the metallicity jump of 0.22 in[Fe/H]at a Galactocentric distance of about9.5 kpc,which appears to be linked to the outer boundary of the thinnest and youngest component of the Galactic *** absence of a significant metallicity gradient in the internal(R10 kpc)regions of the disk demonstrates the absence of noticeable metal enrichment at times of the order of the ages corresponding to those of the disk regions under *** data show that the disk experiences noticeable metal enrichment only during the starburst *** significant dependence was identified between the average metallicity and the age of the clusters.