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Crater 2: An Extremely Cold Dark Matter Halo

  • Authors: Nelson Caldwell, Matthew G. Walker, Mario Mateo, Edward W. Olszewski, Sergey Koposov, Vasily Belokurov, Gabriel Torrealba, Alex Geringer-Sameth, and Christian I. Johnson

2017 The Astrophysical Journal 839 20.

  • Provider: AAS Journals

Caption: Figure 6.

Velocity dispersion vs. halflight radius, for the population of dwarf spheroidals plotted in Figure 5 (excluding those for which the vertical errorbar is >100%). Overplotted is the scaling relation ﹩{ \mathcal V }/(\mathrm{km}\,{{\rm{s}}}^{-1})=\sqrt{{R}_{{\rm{h}}}/\mathrm{pc}}﹩, where ﹩{ \mathcal V }\equiv \sqrt{3}{\sigma }_{{v}_{\mathrm{los}}}﹩ (McGaugh et al. 2007; Walker et al. 2010; Walker & Loeb 2014).

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