A coupled galaxy-cluster model shows that Milky Way globular clusters, many from satellite galaxies, form dynamically interacting black hole binaries whose merger rates increase with redshift up to z=5.
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The MGCS releases official catalogs, completeness tests, and improved absolute proper motions (~3x better than Gaia) for 34 Galactic globular clusters, updating associations with galaxy progenitors for several systems.
RR Lyrae stars yield metallicity measurements for Milky Way halo substructures including Gaia Sausage/Enceladus at [Fe/H] = -1.57 dex, with some features like ED-1 showing disk contamination and others like Shiva and Shakti suggested as in-situ.
Using 8D chemical clustering on APOGEE DR17 and kinematic matching to e-TidalGCs simulations, the authors report 470 ω Cen-like stars including 6 kinematically consistent with its stream and additional links to streams from five other clusters, supporting a common disrupted progenitor.
citing papers explorer
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Milky Way Globular Clusters: Nurseries for Dynamically-Formed Binary Black Holes
A coupled galaxy-cluster model shows that Milky Way globular clusters, many from satellite galaxies, form dynamically interacting black hole binaries whose merger rates increase with redshift up to z=5.
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The Nephele ecosystem: stars, globular clusters, and stellar streams associated with the progenitor galaxy of $\omega$ Centauri
Using 8D chemical clustering on APOGEE DR17 and kinematic matching to e-TidalGCs simulations, the authors report 470 ω Cen-like stars including 6 kinematically consistent with its stream and additional links to streams from five other clusters, supporting a common disrupted progenitor.
- Chemical decoding of kinematic substructures in the Galactic halo