  In this work we present an exact model of a spherically symmetric star
undergoing dissipative collapse in the form of a radial heat flux. The interior
of the star is matched smoothly to the generalised Vaidya line element
representing a two-fluid atmosphere comprising null radiation and a string
fluid. The influence of the string density on the thermal behaviour of the
model is investigated by employing a causal heat transport equation of
Maxwell-Cattaneo form.
