Image Details
Caption: Figure 4.
Speed distributions of Traceable DM (filled blue) and stars accreted from the same merger (solid orange) for the Traceable merger in each of the three MW analogs from Figure 2. In each case, the stars underpredict the DM speed. To correct for this, we boost the dispersion of the stellar tracers according to Equation (5), giving the boosted stellar distribution (dashed orange). Before the boost, the EMDs between the DM and stellar speed distributions are 49, 48, and 40 km s−1 for the left, middle, and right panels, respectively. The boosted stellar distribution more closely traces the DM distribution, and the resulting EMDs are reduced to 4, 5, and 5 km s−1, respectively.
© 2026. The Author(s). Published by the American Astronomical Society.