Abstract
During the period of exponential expansion in an inflationary cosmology, comoving particles that appear within view of a reference observer first move to smaller redshift and then to larger redshift, effectively disappearing after a finite time. It is shown that this passage into and out of communication is not described by either the particle or event horizon, but is well represented by surfaces of constant redshift. Formulas for these surfaces are derived. 5 references.
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