Mass enclosed within 10 pc as a function of time for the satellite halos. The upper panel gives the results for a velocity-independent cross-section (simulations U, V, W, and X), and the lower panel is for velocity-dependent cross-sections (simulations Y and Z). More details on the simulations can be found in Table A.1. In addition, the grey dotted line indicates the preferred mass range for the perturber of the stellar stream GD-1 (Bonaca et al. 2019).