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TRIANGULUM II: A VERY METAL-POOR AND DYNAMICALLY HOT STELLAR SYSTEM

  • Authors: Nicolas F. Martin, Rodrigo A. Ibata, Michelle L. M. Collins, R. Michael Rich, Eric F. Bell, Annette M. N. Ferguson, Benjamin P. M. Laevens, Hans-Walter Rix, Scott C. Chapman, and Andreas Koch

2016 The Astrophysical Journal 818 40.

  • Provider: AAS Journals

Caption: Figure 6.

Distribution of MW dwarf galaxies in the rh–﹩{\sigma }_{{vr}}﹩ plane, compared to the Local Group dwarf galaxy mass profiles. The black dashed and dot-dashed lines correspond to the favored Local Group mass profiles of Collins et al. (2014) for a cored or NFW model, respectively, and the gray bands represent the model dispersions determined by these authors. Black points correspond to Milky Way dwarf galaxies, as listed in McConnachie (2012), Kirby et al. (2015), Martin et al. (2015), and Simon et al. (2015). The Tri II data point is shown as a hollow square for the global kinematics determined in this paper, or as a filled square when using the kinematics of the inner sample. The former is a strong outlier whereas the latter fits well with other MW dwarf galaxies. The two Tri II points have been slightly offset from each other along the rh axis so their error bars do not overlap.

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