  X-ray background surveys indicate the likely presence of diffuse warm gas in
the Local Super Cluster (LSC), in accord with expectations from hydrodynamical
simulations. We assess several other manifestations of warm LSC gas; these
include anisotropy in the spatial pattern of cluster Sunyaev-Zeldovich (S-Z)
counts, its impact on the CMB temperature power spectrum at the lowest
multipoles, and implications on measurements of the S-Z effect in and around
the Virgo cluster.

Astrophysics