Image Details

Choose export citation format:

How to Build an Empirical Speed Distribution for Dark Matter in the Solar Neighborhood

  • Authors: Tal Shpigel, Dylan Folsom, Mariangela Lisanti, Lina Necib, Mark Vogelsberger, Lars Hernquist

Tal Shpigel et al 2026 The Astrophysical Journal 1003 .

  • Provider: AAS Journals

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.

Other Images in This Article

Show More

Copyright and Terms & Conditions

Additional terms of reuse