  We study the characteristics of correlation between particles in jets
produced in heavy-ion collisions. In the framework of parton recombination we
calculate the $\eta$ and $\phi$ distributions of a pion associated with a
trigger particle. The origin of the pedestal in $\Delta\eta$ is related to the
longitudinal expansion of the thermal partons that are enhanced by the energy
loss of hard partons traversing the bulk medium. The peaks in $\Delta\eta$ and
$\Delta\phi$ are related to the same angular spread of the shower partons in a
jet cone. No artificial short- or long-range correlations are put in by hand. A
large part of the correlation between hadrons in jets is due to the correlation
among the shower partons arising from momentum conservation. Recombination
between thermal and shower partons dominates the correlation characterisitics
in the intermediate $p_T$ region.
