Early evolution of newly born magnetars with a strong toroidal field
Early evolution of newly born magnetars with a strong toroidal field
复制标题
DOI：
10.1111/j.1365-2966.2008.14054.x
复制
发表时间：
2008-11
影响因子：
4.8
通讯作者：
S. Dall’Osso;S. Shore;L. Stella
中科院分区：
文献类型：
--
作者：
S. Dall’Osso;S. Shore;L. Stella
我们提出了一个国家的最先进的方案，为新诞生的磁星作为强引力波（GW）的来源，在形成后的早期。我们解决几个方面的天体物理学的快速旋转，超磁化中子星（NS），包括早期冷却过渡到超流性，磁场的影响，平衡形状的NS，内部动力学状态的完全退化，斜转子和强度的电磁转矩新生NS。我们表明，我们的方案是一致的超新星遗迹周围的异常X射线脉冲星（AXP）和软伽马射线中继器（SGR）在银河系中，限制从中央NS的电磁能量输入≤ 10 51 erg的最近的研究。我们进一步表明，如果满足这一条件，那么来自这些源的GW信号可能会被下一代GW探测器探测到，直到室女座星系团距离，可以估计事件发生率为1年。最后，我们指出，在10 - 16 G范围内的内部磁场的衰减强烈耦合与NS冷却在非常早期的阶段，从而显着减缓这两个过程：该领域可以保持这种强大的至少10 - 3年，在此期间，核心温度保持高于几倍10 - 8 K。
We present a state-of-the-art scenario for newly born magnetars as strong sources of gravitational waves (GWs) in the early days after formation. We address several aspects of the astrophysics of rapidly rotating, ultra-magnetized neutron stars (NSs), including early cooling before transition to superfluidity, the effects of the magnetic field on the equilibrium shape of NSs, the internal dynamical state of a fully degenerate, oblique rotator and the strength of the electromagnetic torque on the newly born NS. We show that our scenario is consistent with recent studies of supernova remnant surrounding Anomalous X-ray Pulsars (AXPs) and Soft Gamma-Ray Repeaters (SGRs) in the Galaxy that constrains the electromagnetic energy input from the central NS to be ≤ 10 51 erg. We further show that if this condition is met, then the GW signal from such sources is potentially detectable with the forthcoming generation of GW detectors up to Virgo cluster distances where an event rate ∼ 1 yr ―1 can be estimated. Finally, we point out that the decay of an internal magnetic field in the 10 16 G range couples strongly with the NS cooling at very early stages, thus significantly slowing down both processes: the field can remain this strong for at least 10 3 yr, during which the core temperature stays higher than several times 10 8 K.