Image Details
Caption: Figure 2.
The CMD of the Draco dwarf spheroidal galaxy (MV = −8.7 mag; ∼2.5 × 105 L⊙) from the SDSS, plotted in absolute magnitude space. The approximate TRGB magnitude in the r band is plotted at Mr = −3.0 mag (Sand et al. 2014). Assuming a 50% completeness magnitude of (g, r) = (27.83, 27.35) mag, we have also plotted the corresponding absolute magnitude at our fiducial distances of D = 1.5, 3.5, and 5 Mpc. For dwarfs at D ≈ 5 Mpc, one should be able to resolve stars ∼2 mag below the TRGB. Meanwhile, at D ≈ 1.5 Mpc, HB stars should be resolved.
© 2021. The American Astronomical Society. All rights reserved.