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A Unique Star in the Outer Halo of the Milky Way

  • Authors: David K. Lai, Constance M. Rockosi, Michael Bolte, Jennifer A. Johnson, Timothy C. Beers, Young Sun Lee, Carlos Allende Prieto, and Brian Yanny

LAI et al. 2009 The Astrophysical Journal 697 L63.

  • Provider: AAS Journals

Caption: Figure 3.

[Mg/Fe] and [Ca/Fe] for SDSS J234723.6+010833.4 (the filled star), along with data from multiple other recent studies. Most of the measurements are for nearby halo stars: the large circles are from Lai et al. (2008), the x symbols are from Aoki et al. (2007a, 2007b) and references therein, the diamonds are from Cayrel et al. (2004), the triangles are from Cohen et al. (2008, 2004), the asterisks are from Ivans et al. (2003), the plus signs are from Barklem et al. (2005), and the small circles are from Lai et al. (2004). We have also included abundances measured in dSph galaxies. These are plotted as the squares and come from Frebel et al. (2009); Koch et al. (2008); Fulbright et al. (2004); Shetrone et al. (2003, 2001) (green in the electronic version). The only stars that seem to match the high [Ca/Fe] are the CEMP stars from the study of Aoki et al. (2007a) (red).

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