标题： 来自最终引力恒星坍缩的电磁脉冲 显示英文标题

标题： Electromagnetic Pulse from Final Gravitational Stellar Collapse

摘要： 我们采用了一个有效的引力恒星最终坍缩模型，该模型包含了这一复杂现象中的相关物理过程：在先进恒星均质核心的施瓦茨希尔德度规中球形径向下落，巨大的磁偶极矩，磁流体动力学材料响应和现实状态方程（EOS）。 电磁脉冲既计算了经历流体力学反弹的中等大小核心，也计算了经历黑洞形成的大型大小核心。 我们明确表明，必须存在两类中子星，由最大允许质量分开：那些作为孤立恒星坍缩的（动态质量极限）和那些在双星系统中坍缩并允许质量吸积的（静态中子星质量）。 我们的结果表明，与黑洞形成相关的电磁脉冲谱是一个普遍特征，与核状态方程无关。 我们的结果还预测，必须存在质量小于静态中子星稳定极限的黑洞。 显示英文摘要

摘要： We employ an effective gravitational stellar final collapse model which contains the relevant physics involved in this complex phenomena: spherical radical infall in the Schwarzschild metric of the homogeneous core of an advanced star, giant magnetic dipole moment, magnetohydrodynamic material response and realistic equations of state (EOS). The electromagnetic pulse is computed both for medium size cores undergoing hydrodynamic bounce and large size cores undergoing black hole formation. We clearly show that there must exist two classes of neutron stars, separated by maximum allowable masses: those that collapsed as solitary stars (dynamical mass limit) and those that collapsed in binary systems allowing mass accretion (static neutron star mass). Our results show that the electromagnetic pulse spectrum associated with black hole formation is a universal signature, independent of the nuclear EOS. Our results also predict that there must exist black holes whose masses are less than the static neutron star stability limit.