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I will talk about my recent work on protostellar multiplicity and comparison with observations of a bimodal separation distribution. We find that Core fragmentation is able to reproduce observations, suggesting that core-fragmentation and migration is a likely formation pathway for binaries with separations down to 20AU. I will also talk about how binarity can complicate interpretations of observations of binary simulations. Finally, I will talk about the preliminary work on how protostars get their spin, and whether multiplicity can be a formation path for fast rotators. Our results find that fragmentation events in a circumstellar disc can lead to the spin-up of the primary star. |
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