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GASTRO Library. II. Exploring Chemical Bimodalities in Disk Galaxies with GSE-like Mergers and Massive Star-forming Clumps

  • Authors: João A. S. Amarante, Chervin F. P. Laporte, Victor P. Debattista, Leandro Beraldo e Silva, Guilherme Limberg, Hélio D. Perottoni, Zhao-Yu Li, Lais Borbolato, Karl Fiteni, Chengye Cao, Nathan Deg, Tigran Khachaturyants, Xiaojie Liao

João A. S. Amarante et al 2026 The Astrophysical Journal 1004 .

  • Provider: AAS Journals

Caption: Figure B1.

[O/Fe] histogram for the interval −0.7 < [Fe/H] < − 0.2, 4 < R/kpc < 12, and ∣z∣ < 3 kpc. The dark and light-shaded areas correspond to the contribution of stars born in the inner part of the galaxy, i.e., R  <  4 kpc, with orbital circularity ηs < 0.9 and ηs > 0.9, respectively. Overall, from the stars born in the inner part of the galaxy that contribute to the α-rich peak at the disk, there is a larger fraction with hotter orbits in the clumpy models.

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