Castilho, Wagner M. [UNESP]Qian, Wei-Liang [UNESP]Gardim, Fernando G.Hama, YogiroKodama, Takeshi2022-04-282022-04-282017-06-15Physical Review C, v. 95, n. 6, 2017.2469-99932469-9985http://hdl.handle.net/11449/220866Measurements of di-hadron azimuthal correlations at different centralities for Au+Au collisions at 200A GeV were reported by the PHENIX Collaboration. The data were presented for different ranges of transverse momentum. In particular, it was observed that the away-side correlation evolves from a double- to a single-peak structure when the centrality decreases. In this work, we show that these features naturally appear due to an interplay between the centrality-dependent smooth background elliptic flow and the one produced by event-by-event fluctuating peripheral tubes. To compare with the PHENIX data, we also carry out numerical simulations by using a hydrodynamical code nexspherio, and calculate the correlations by both cumulant and the ZYAM method employed by the PHENIX Collaboration. Our results are in reasonable agreement with the data. A brief discussion on the physical content of the present model and its difference from other viewpoints is also presented.engArtigo10.1103/PhysRevC.95.0649082-s2.0-85020836172