%0 Journal Article %T Magnetic Fields and the Formation of Cores and Disks %A Shantanu Basu %A Nicole D. Bailey %A Wolf B. Dapp %J Physics %D 2013 %I arXiv %X We review recent results of non-ideal magnetohydrodynamic models for the fragmentation of molecular clouds and the collapse of cloud cores to form protostar-disk systems. Thin-disk models can elucidate many aspects of the physical problem and allow the calculation of large dynamic range of time and length scales. %U http://arxiv.org/abs/1304.1956v1