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Paper: Magnetar Connection to Hypernovae and GRB: Numerical Simulations
Volume: 385, Numerical Modeling of Space Plasma Flows: Astronum-2007
Page: 109
Authors: Komissarov, S.S.
Abstract: We describe the early evolution of a core-collapse supernova explosion following the birth of a magnetar with the dipolar magnetic field of B = 1015 G and the rotational period of 2 ms, which was studied by means of axisymmetric general relativistic MHD simulations. The numerical models exhibit highly collimated magnetically-driven jets very early on. The power released in the jets is about 3 × 1050 erg/s which implies the spin-down time of ≃ 37 s. Given the observed propagation speed of the jets, vp ≃ 0.17c, they are expected to traverse the progenitor in few seconds and after this most of the released rotational energy would be carried away by these jets into the surrounding space. This could be the origin of some long duration GRBs and their afterglows. The total rotational energy of the magnetar, E ≃ 1052 erg, is sufficient to drive a hypernova but the fraction of this energy transferred by the jets to the stellar ejecta could be rather small.
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