Star cluster formation in turbulent, magnetized dense clumps with radiative and outflow feedback

We present three orion simulations of star cluster formation in a 1000 M-circle dot, turbulent molecular cloud clump, including the effects of radiative transfer, protostellar outflows, and magnetic fields. Our simulations all use self-consistent turbulent initial conditions and vary the mean mass-to-flux ratio relative to the critical value over mu(Phi) = 2, mu(Phi) = 10, and mu(Phi) = infinity to gauge the influence of magnetic fields on star cluster formation. We find, in good agreement with previous studies, that magnetic fields corresponding to mu(Phi) = 2 lower the star formation rate by a factor of approximate to 2.4 and reduce the amount of fragmentation by a factor of approximate to 2 relative to the zero-field case. We also find that the field increases the characteristic sink particle mass, again by a factor of approximate to 2.4. The magnetic field also increases the degree of clustering in our simulations, such that the maximum stellar densities in the mu(Phi) = 2 case are higher than the others by again a factor of approximate to 2. This clustering tends to encourage the formation of multiple systems, which are more common in the rad-MHD runs than the rad-hydro run. The companion frequency in our simulations is consistent with observations of multiplicity in Class I sources, particularly for the mu(Phi) = 2 case. Finally, we find evidence of primordial mass segregation in our simulations reminiscent of that observed in star clusters like the Orion Nebula Cluster.