%0 Generic %1 masada2020convection %A Masada, Youhei %A Takiwaki, Tomoya %A Kotake, Kei %D 2020 %K dynamo neutron star %T Deep Core Convection and Dynamo in Newly-born Neutron Star %U http://arxiv.org/abs/2001.08452 %X We report results from a convection dynamo simulation of proto-neutron star (PNS), with a nuclear equation of state (EOS) and the initial hydrodynamic profile taken from a neutrino radiation-hydrodynamics simulation of a massive stellar core-collapse. A moderately-rotating PNS with the spin period of $170$ ms in the lepton-driven convection stage is focused. We find that large-scale flow and thermodynamic fields with north-south asymmetry develop in the turbulent flow, as a consequence of the convection in the central part of the PNS, which we call as a "deep core convection". Intriguingly, even with such a moderate rotation, large-scale, $10^15$ G, magnetic field with dipole symmetry is spontaneously built up in the PNS. The turbulent electro-motive force arising from rotationally-constrained core convection is shown to play a key role in the large-scale dynamo. The large-scale structures organized in the PNS may impact the explosion dynamics of supernovae and subsequent evolution to the neutron stars.

@misc{masada2020convection, abstract = {We report results from a convection dynamo simulation of proto-neutron star (PNS), with a nuclear equation of state (EOS) and the initial hydrodynamic profile taken from a neutrino radiation-hydrodynamics simulation of a massive stellar core-collapse. A moderately-rotating PNS with the spin period of $170$ ms in the lepton-driven convection stage is focused. We find that large-scale flow and thermodynamic fields with north-south asymmetry develop in the turbulent flow, as a consequence of the convection in the central part of the PNS, which we call as a "deep core convection". Intriguingly, even with such a moderate rotation, large-scale, $10^{15}$ G, magnetic field with dipole symmetry is spontaneously built up in the PNS. The turbulent electro-motive force arising from rotationally-constrained core convection is shown to play a key role in the large-scale dynamo. The large-scale structures organized in the PNS may impact the explosion dynamics of supernovae and subsequent evolution to the neutron stars.}, added-at = {2020-01-25T07:54:05.000+0100}, author = {Masada, Youhei and Takiwaki, Tomoya and Kotake, Kei}, biburl = {https://www.bibsonomy.org/bibtex/2473c4dac7416d12226ba630e9dfa090d/ericblackman}, description = {Deep Core Convection and Dynamo in Newly-born Neutron Star}, interhash = {009a9cde175becf1f4ccae6a0d3acb89}, intrahash = {473c4dac7416d12226ba630e9dfa090d}, keywords = {dynamo neutron star}, note = {cite arxiv:2001.08452Comment: 7 pages, 5 figures, submitted to ApJL}, timestamp = {2020-01-25T07:54:05.000+0100}, title = {Deep Core Convection and Dynamo in Newly-born Neutron Star}, url = {http://arxiv.org/abs/2001.08452}, year = 2020 }