Kinematics of Milky Way Satellites: Mass Estimates, Rotation Limits, and Proper Motions

Figure 4

Projections for the error on the log of the mass within a given physical radius for Fornax. The position and the errors on the stars from the Walker et al. [42] data sample have been used. Each curve assumes a different fiducial model for the einasto parameters of the dark matter halo: 𝜌₋₂=2×10⁷ M_⨀kpc⁻³ and 𝑟₋₂=1 kpc (solid black), 𝜌₋₂=1×10⁷M_⨀kpc⁻³ and 𝑟₋₂=2 kpc (dotted red), and 𝜌₋₂=0.5×10⁷ M_⨀kpc⁻³ and 𝑟₋₂=5 kpc (dashed blue).