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To better understand the initial conditions of the high-mass star formationprocess, it is crucial to study at high-angular resolution the morphology, thekinematics, and eventually the interactions of the coldest condensationsassociated with intermediate-/high-mass star forming regions. The paper studiesthe cold condensations in the intermediate-/high-mass proto-cluster IRAS05345+3157, focusing the attention on the interaction with the other objects inthe cluster. We have performed millimeter high-angular resolution observations,both in the continuum and several molecular lines, with the PdBI and the SMA.In a recent paper, we have already published part of these data. The mainfinding of that work was the detection of two cold and dense gaseouscondensations, called N and S (masses ~2 and ~9 M_sun), characterised by highvalues of the deuterium fractionation (~0.1 in both cores). In this paper, wepresent a full report of the observations, and a complete analysis of the dataobtained. The millimeter maps reveal the presence of 3 cores inside theinterferometers primary beam, called C1-a, C1-b and C2. None of them areassociated with cores N and S. C1-b is very likely associated with a newlyformed early-B ZAMS star embedded inside a hot-core, while C1-a is more likelyassociated with a class 0 intermediate-mass protostar. The nature of C2 isunclear. Both C1-a and C1-b are good candidates as driving sources of apowerful CO outflow, which strongly interacts with N and S, as demonstrated bythe velocity gradient across both condensations. Our major conclusion is thatthe chemical properties of these pre-stellar cores are similar to thoseobserved in low-mass isolated ones, while the kinematics is dominated by theturbulence triggered by the CO outflow and can influece their evolution.

Linking pre- and proto-stellar objects in the intermediate-/high-mass star forming region IRAS 05345+3157