Magnetic processes in a collapsing dense core. II Fragmentation. Is there a fragmentation crisis ?

Understand

Abridged.

• A large fraction of stars are found in binary systems.
• It is therefore important for our understanding of the star formation process, to investigate the fragmentation of dense molecular cores.
• We study the influence of the magnetic field, ideally coupled to the gas, on the fragmentation in multiple systems of collapsing cores.