Abstract
Abstract The dark matter halo masses of galaxies can be estimated from their stellar masses via abundance matching (AM). For both the Milky Way and M31, the AM mass is higher than the mass inferred from kinematics. The higher AM masses exacerbate the missing satellite problem. The difference is especially pronounced for M31, for which but . This is more than expected from scatter in the AM relation, and may suggest the need for separate AM relations for early and late type galaxies.
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