A Deep View into the Nucleus of the Sagittarius Dwarf Spheroidal Galaxy with MUSE. II. Kinematic Characterization of the Stellar Populations

  title={A Deep View into the Nucleus of the Sagittarius Dwarf Spheroidal Galaxy with MUSE. II. Kinematic Characterization of the Stellar Populations},
  author={Mayte Alfaro-Cuello and Nikolay Kacharov and Nadine Neumayer and Paolo Bianchini and Alessandra Mastrobuono-Battisti and Nora L{\"u}tzgendorf and Anil C. Seth and Torsten B{\"o}ker and Sebastian Kamann and Ryan Leaman and Laura L. Watkins and Glenn van de Ven},
  journal={The Astrophysical Journal},
The Sagittarius dwarf spheroidal galaxy (Sgr dSph) is in an advanced stage of disruption but still hosts its nuclear star cluster (NSC), M54, at its center. In this paper, we present a detailed kinematic characterization of the three stellar populations present in M54: young metal-rich (YMR); intermediate-age metal-rich (IMR); and old metal-poor (OMP), based on the spectra of $\sim6500$ individual M54 member stars extracted from a large MUSE/VLT dataset. We find that the OMP population is… Expand
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The center of the Sagittarius dwarf spheroidal galaxy (Sgr dSph) hosts a nuclear star cluster, M54, which is the only galaxy nucleus that can be resolved into individual stars at optical wavelengths.Expand
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