中子星的诞生加速度
Birth accelerations of neutron stars
摘要：
我们认为，中子星在诞生时经历了三个相关的物理变化，它们可能起源于磁转动不稳定性：（i）周期从初始值P_0增加到当前值P_s，意味着转动能ΔE_rot的变化;（ii）其磁场从初始值B_0到当前表面值B_s呈指数衰减，意味着辐射能ΔE_rad的变化;（iii）空速从初始值v_0增加到当前值v，意味着动能ΔE_kin的变化。假设这些变化由ΔE_rad + ΔE_kin =ΔE_rot连接。这意味着辐射损失和动能的增加都是以转动能损失为代价的。结果表明，如果中子星在磁场为10 ^（15）~ 10 ^（16）G，初始周期为1-20 ms的条件下诞生，这种能量转换发生在10^（-4）s量级，中子星的诞生加速度为10^（8）g量级。
英文摘要：
We suggest that neutron stars experienced at birth three related physical changes, which may originate in magneto-rotational instabilities: (i) an increase in period from the initial value P_0 to the current value P_s, implying a change of rotational energy ΔE_rot; (ii) an exponential decay of its magnetic field from the initial value B_0 to the current surface value B_s, implying a change of radiative energy ΔE_rad; and (iii) an increase of space velocity from the initial value v_0 to the current value v, implying a change of kinetic energy ΔE_kin. These changes are assumed to be connected by ΔE_rad + ΔE_kin =ΔE_rot. This means that the radiation loss and increase of kinetic energy are both at the expense of a rotational energy loss. It is shown that this energy conversion occurs during times of order of 10^(-4) s if the neutron stars are born with magnetic fields in the range of 10^(15)-10^(16) G and initial periods in range 1-20 ms. It is shown that the birth accelerations of neutron stars are of the order of 10^(8) g.
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