Extended Data Fig. 3: Predicted DM excesses for 26 FRBs intersecting halos of different masses.
From: The observed impact of galaxy halo gas on fast radio bursts
Top: We use a ‘beta’ model with β = 0.5 and a modified NFW model for the radial density distribution. Results are shown in blue and orange respectively. For each halo mass, 1σ error ranges are shown based on 100 simulations of samples of 26 FRB intersections within the virial radii. The FRB positions relative to the halo centres are simulated using the offsets and CHIME/FRB Catalog 1 position uncertainties of the 26 FRBs in Table 1. The grey shaded area indicates the likely (95% confidence) DM excess. fgas = 1 is assumed. Bottom: Same as top, but with values of fgas specific to each halo mass derived from four cosmological simulations (see text for details). A modified NFW radial-density model is assumed.
