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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 9.

Bottom: uSDSS vs. uSDSS − G CMD, where black points represent HB stars. Pink squares indicate stars in common with A. F. Marino et al. (2013), while the purple rectangle marks the region we expect AIIb to dominate. Top: uSDSS − G kernel density distribution of HB stars. The vertical brown line separates the reddest overdensity (see the text) from the rest of the HB.

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