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Tracing M22’s Origins: Spatial and Chemical Constraints on Its Formation History

  • Authors: Emanuele Dondoglio, Antonino P. Milone, Randa Asa'd, Anna F. Marino, Alessandra Mastrobuono-Battisti, Fabrizio Muratore, Tuila Ziliotto, Emanuele Bortolan, Giacomo Cordoni, Maria Vittoria Legnardi, Edoardo P. Lagioia, Marco Tailo

Emanuele Dondoglio et al 2026 The Astronomical Journal 172 .

  • Provider: AAS Journals

Caption: Figure 4.

G vs. the verticalized color ﹩{{\rm{\Delta }}}_{{{\rm{u}}}_{{\rm{SDSS}}},G}﹩ of RGB stars (bottom), with its kernel density distribution (top) indicated with a black line. The best-fit Gaussians representing the canonical and anomalous populations are indicated in blue and red, respectively.

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