Correlation energy of an inhomogeneous electron gas: A coordinate-space model

We develop a coordinate-space model for dynamical correlations in an inhomogeneous electron gas. The model treats opposite-spin and same-spin pairs separately, and it also accounts properly for correlation contributions to the kinetic energy. Furthermore, it gives identically zero correlation energy in the case of one-electron systems. Applications to the uniform electron gas and to the atoms H through Ar are reported.