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Magnetised Polish doughnuts revisited

机译:重新磁化的波兰甜甜圈

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We discuss a procedure to build new sequences of magnetised, equilibrium tori around Kerr black holes which combines two approaches previously considered in the literature. For simplicity we have assumed that the test-fluid approximation holds, and hence we neglected the self-gravity of the fluid. The models were built assuming a particular form of the angular momentum distribution from which the location and morphology of equipotential surfaces can be computed. This ansatz includes, in particular, the constant angular momentum case originally employed in the construction of thick tori – or Polish doughnuts – and it has already been used to build equilibrium sequences of purely hydrodynamical models. We discuss the properties of the new models and their dependence on the initial parameters. These new sequences can be used as initial data for magnetohydrodynamical evolutions in general relativity.
机译:我们讨论了一种在Kerr黑洞周围建立磁化平衡托里的新序列的程序,该程序结合了文献中先前考虑的两种方法。为简单起见,我们假定测试流体近似成立,因此我们忽略了流体的自重。建立模型时假设角动量分布的特定形式,可以从中计算出等势面的位置和形态。特别是,这种ansatz包括最初用于制作厚圆托或波兰甜甜圈的恒定角动量情况,并且已经被用于建立纯流体力学模型的平衡序列。我们讨论了新模型的属性及其对初始参数的依赖性。这些新序列可以用作广义相对论中磁流体动力学演化的初始数据。

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