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We report high precision charged-particle pair (2-D) correlation analyses inthe space of $\Delta \phi$ (azimuth) and $\Delta \eta$ (pseudorapidity), forminimum bias Au + Au collisions at $\sqrt{s_{NN}}$ = 200 GeV as a function ofcentrality (0-80%). The intermediate transverse momenta region chosen $0.8 <p_t < 4.0$ GeV/c corresponds to an emission source size $\sim2$fm obtained fromHBT measurements and should resolve substructures at the scale of $\sim2$fm.The difference and the sum of unlike-sign and like-sign charged pairs formCharge Dependent (CD) correlations and Charge Independent (CI) correlationsrespectively. The CD displays the initial correlation at hadronization of theopposite sign pairs emitted from the same space-time region as modified byfurther medium interactions before kinetic freeze-out. Our analysis of the CDcorrelations shows approximately jet-like structure, independent of centralityand is consistent with the initial correlation which is predicted by Pythia (orHIJING) jets. The CI correlation displays the average structure of thecorrelated emitting sources after kinetic freeze-out. For the most centralbins, the $\Delta \eta$ width of the CI correlation on the near side ($\Delta\phi$ around $0^\circ$) is elongated by a factor $\sim$3 destroying thejet-like symmetry. This elongation decreases continually with decreasingcentrality and essentially restores the jet-like symmetric structure in themost peripheral bins. The Pythia and HIJING event generators together with aQCD inspired Parton Bubble Model (PBM), which motivated this analysis, are usedto compare to our data. We discuss the arguments for substructure, surfaceemission, and opacity in the central fireball region.

Charge Independent(CI) and Charge Dependent(CD) correlations vs.  Centrality from $\Delta \phi \Delta \eta$ Charged Pairs in Minimum Bias Au +  Au Collisions at 200 Gev