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Detailed Chemical Abundances of Stars in the Outskirts of the Tucana II Ultrafaint Dwarf Galaxy

  • Authors: Anirudh Chiti, Anna Frebel, Alexander P. Ji, Mohammad K. Mardini, Xiaowei Ou, Joshua D. Simon, Helmut Jerjen, Dongwon Kim, John E. Norris

Anirudh Chiti et al 2023 The Astronomical Journal 165 .

  • Provider: AAS Journals

Caption: Figure 4.

[X/Fe] vs. [Fe/H] trends of stars in our Tucana II sample (large blue circles), stars in the inner region of Tucana II (red circles), and other UFDs for the iron-peak elements Mn, Co, and Ni and the neutron-capture elements Sr, Ba, and Eu. The UFD data are plotted with the same legend as in Figure 3. Our newly characterized Tucana II stars show deficiency in Sr and Ba abundances, as is typical for UFD stars, confirming their association with the system. The iron-peak abundances largely follow trends seen in other UFDs and the MW halo, except for the most metal-rich Tucana II star that appears to be deficient in Mn.

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