  We improve earlier Galactic bounds that can be placed on the fraction of dark
matter in charged elemental particles (CHAMPs). These constraints are of
interest for CHAMPs whose mass is too large for them to have seen through their
electromagnetic interaction with ordinary matter, and whose gyroradius in the
galactic magnetic field is too small for halo CHAMPs to reach Earth. If
unneutralized CHAMPs in that mass range are well mixed in the halo, they can at
most make up a fraction < (3-7) x 10^{-3} of the mass of the Galactic halo.
CHAMPs might still be a solution to the cuspy halo problem if they decay to
neutral dark matter but a fine-tuning is required. We also discuss the case
where CHAMPs do not populate a spherical halo.

Astrophysics