Chemical Composition of Globular Clusters of Milky Way Subsystems from Gaia DR2 Data
- Authors: Budanova N.O.1, Bajkova A.T.2, Bobylev V.V.2, Korchagin V.I.1
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Affiliations:
- Southern Federal University
- Central (Pulkovo) Astronomical Observatory
- Issue: Vol 63, No 12 (2019)
- Pages: 998-1009
- Section: Article
- URL: https://journals.rcsi.science/1063-7729/article/view/193286
- DOI: https://doi.org/10.1134/S1063772919120023
- ID: 193286
Cite item
Abstract
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.
About the authors
N. O. Budanova
Southern Federal University
Author for correspondence.
Email: budanova-nata@mail.ru
Russian Federation, Rostov-on-Don
A. T. Bajkova
Central (Pulkovo) Astronomical Observatory
Author for correspondence.
Email: bajkova@gaoran.ru
Russian Federation, St. Petersburg196140
V. V. Bobylev
Central (Pulkovo) Astronomical Observatory
Email: bajkova@gaoran.ru
Russian Federation, St. Petersburg196140
V. I. Korchagin
Southern Federal University
Email: bajkova@gaoran.ru
Russian Federation, Rostov-on-Don
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