Chemical Composition of Globular Clusters of Milky Way Subsystems from Gaia DR2 Data

被引：2
|
作者：
Budanova, N. O. [1 ]
Bajkova, A. T. [2 ]
Bobylev, V. V. [2 ]
Korchagin, V., I [1 ]
机构：
[1] Southern Fed Univ, Rostov Na Donu, Russia
[2] Russian Acad Sci, Cent Pulkovo Astron Observ, St Petersburg 196140, Russia
来源：
ASTRONOMY REPORTS | 2019年 / 63卷 / 12期
关键词：
ABSOLUTE PROPER MOTION; MASS-DISTRIBUTION; SPECTRAL TYPES; GALAXY; SYSTEM; STARS; HALO; VELOCITIES; KINEMATICS; DENSITY;
D O I：
10.1134/S1063772919120023
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
Results of a study of the kinematic and chemical properties of globular clusters of the Milky Way based on data from the Gaia DR2 catalog and meaurements with the Hubble Space Telescope are presented. A new method for dividing globular clusters into Galatic subsystems based on the elements of their Galactic orbits is proposed. Samples of globular clusters belonging to the bar/bulge, thick disk, and halo of the Milky Way are obtained. The mean metallicities of the globular clusters in various subsystems are calculated. The mean metallicities of globular clusters of the thick disk and halo display statistically significant differences. At the same time, no statistically significant differences are present between the mean metallicities of halo globular clusters moving in the direction of rotation of the Galactic disk and those moving in the retrograde direction. This argues against the suggestion that retrograde and prograde globular clusters have different origins.
引用
收藏
页码：998 / 1009
页数：12
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