Radial flow studies in intermediate-energy heavy-ion collisions with BUU and coalescence models

We study Au +Au reactions at several energies ranging from 250 MeV/A up to 2 GeV/A with BUU theory and with a coalescence model to approximate the final state of protons and light composites. Energy spectra are analyzed in terms of a radially expanding thermal source and global fits determine flow velocities and temperatures. Sensitivity to equations of state, in-medium cross sections, Coulomb and compression effects are all investigated. The results are quite consistent with data from the EOS-TPC collaboration but seem to suggest that the flow is less sensitive to details than would be required of a signal able to put constraints on the equation of state or other quantities