Most of the baryons associated with galaxy halos reside in the
circumgalactic medium. A significant fraction of the mass is at
temperatures well below the halo virial temperature. What holds
the cool CGM up? I will present new measurements of the kinematics
of circumgalactic gas. The data show that much of the low-ionization
CGM rotates in the same direction as the galactic disk, suggesting
substantial centrifugal support. Disturbances from galactic winds
I will talk about joint works with F. C. Marques and A. Neves, and L. Guth.
This is joint work with Rafael Montezuma.