Koposov 2 is shown to be an old (13.7 Gyr) star cluster with half-light radius 2.7 pc, absolute magnitude -0.95, and stellar mass 372 solar masses, supporting a star cluster classification over a dwarf galaxy.
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2 Pith papers cite this work. Polarity classification is still indexing.
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CRIRES+ spectra of 30 RGB stars in Liller 1 reveal multi-metallicity sub-populations with abundance trends matching the bulge field and Terzan 5, indicating in-situ formation rather than globular-cluster origin.
citing papers explorer
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The Hubble Missing Globular Clusters Survey IV. Ultra-faint compact satellites of the Milky Way. The case of Koposov 2
Koposov 2 is shown to be an old (13.7 Gyr) star cluster with half-light radius 2.7 pc, absolute magnitude -0.95, and stellar mass 372 solar masses, supporting a star cluster classification over a dwarf galaxy.
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CRIRES+ reveals the chemistry of the stellar sub-populations in the bulge fossil fragment Liller 1
CRIRES+ spectra of 30 RGB stars in Liller 1 reveal multi-metallicity sub-populations with abundance trends matching the bulge field and Terzan 5, indicating in-situ formation rather than globular-cluster origin.