Nascent neutron stars with millisecond periods and magnetic fields in excess of 10 ^ { 16 } Gauss can drive highly energetic and asymmetric explosions known as magnetar-powered supernovae .
These exotic explosions are one theoretical interpretation for supernovae Ic-BL which are sometimes associated with long gamma-ray bursts .
Twisted magnetic field lines extract the rotational energy of the neutron star and release it as a disk wind or a jet with energies greater than 10 ^ { 52 } erg over \sim 20 sec .
What fractions of the energy of the central engine go into the wind and the jet remain unclear .
We have performed two-dimensional hydrodynamical simulations of magnetar-powered supernovae ( SNe ) driven by disk winds and jets with the CASTRO code to investigate the effect of the central engine on nucleosynthetic yields , mixing , and light curves .
We find that these explosions synthesize less than 0.05 { M } _ { \odot } of ^ { 56 } \mathrm { Ni } and that this mass is not very sensitive to central engine type .
The morphology of the explosion can provide a powerful diagnostic of the properties of the central engine .
In the absence of a circumstellar medium these events are not very luminous , with peak bolometric magnitudes M _ { b } \sim - 16.5 due to low ^ { 56 } \mathrm { Ni } production .