Statistical determination of the distance to the Galactic Centre and the outset of the Milky Way old bulge: astrophysical conclusions

Griv, Evgeny; Jiang, Ing-Guey; Majaess, Daniel; Minniti, Dante

doi:10.1007/s10509-023-04236-9

Astrophys Space Sci

2023

DOI: 10.1007/s10509-023-04236-9

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Statistical determination of the distance to the Galactic Centre and the outset of the Milky Way old bulge: astrophysical conclusions

Evgeny Griv,

Ing-Guey Jiang,

Daniel Majaess

et al.

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2024

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References 63 publications

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A census of new globular clusters in the Galactic bulge

Bica,

Ortolani,

Barbuy

et al. 2024

A&A

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Context. The number of known globular clusters in the Galactic bulge has been increasing steadily thanks to different new surveys. Aims. The aim of this study is to provide a census of the newly revealed globular clusters in the Galactic bulge, and analyze their characteristics. Methods. In recent years, many globular clusters have been discovered or identified. The stellar populations to which they belong are indicated in their original studies: they are mostly bulge clusters, with some identified as disk or halo members. We collected 41 new globular clusters revealed in the last decade and compared them to the known bulge clusters. Results. The new clusters are intrinsically faint with MV of around −6.0 mag. The distance to the Sun of the ensemble of well-known and new bulge clusters is compatible with the Galactocentric distance measurements from the Galactic black hole location. The ensemble sample shows metallicity peaks at [Fe/H] ∼ −1.08 ± 0.35 and −0.51 ± 0.25 dex, confirming previous findings. The age–metallicity relation of the new clusters younger than 10 Gyr is compatible with that of the ex situ samples of the dwarf galaxies Sagittarius, Canis Majoris, and Gaia-Enceladus-Sausage. The clusters with ages between 11.5 and 13.5 Gyr show no age–metallicity relation, because they are all old. This is compatible with their formation in situ in the early Galaxy.

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A census of new globular clusters in the Galactic bulge

Bica,

Ortolani,

Barbuy

et al. 2024

A&A

View full text Add to dashboard Cite

show abstract

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Statistical determination of the distance to the Galactic Centre and the outset of the Milky Way old bulge: astrophysical conclusions

Cited by 1 publication

References 63 publications

A census of new globular clusters in the Galactic bulge

A census of new globular clusters in the Galactic bulge

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