Disc Formation in Turbulent Cloud Cores: Circumventing the Magnetic Braking Catastrophe

We present collapse simulations of strongly magnetised, 100 M⊙, turbulent cloud cores. Around the protostars formed during the collapse Keplerian discs with typical sizes of up to 100 AU build up in contrast to previous simulations neglecting turbulence. Analysing the condensations in which the discs form, we show that the magnetic flux loss is not sufficient to explain the build-up of Keplerian discs. The average magnetic field is strongly …