Accessibility of the stochastic gravitational wave background from magnetars to the interferometric gravitational wave detectors
Accessibility of the stochastic gravitational wave background from magnetars to the interferometric gravitational wave detectors
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DOI：
10.1103/physrevd.87.042002
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发表时间：
2013-02
影响因子：
5
通讯作者：
Chengjian Wu;T. Regimbau;V. Mandic
中科院分区：
文献类型：
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作者：
Chengjian Wu;T. Regimbau;V. Mandic
磁星被认为是引力波的来源，可能被当前和未来的地球引力波探测器观测到。在本文中，我们计算了由宇宙中所有磁星的贡献之和产生的随机引力波背景，并研究了它对第二代和第三代引力波探测器网络的可访问性。我们在这个模型中的参数空间进行系统的扫描，允许磁场，椭圆率，初始周期，磁星的速率在目前认为的值范围内变化。我们还考虑了不同的建议配置的磁场（极向，环形，扭曲环面）和不同的建议恒星形成的历史。我们确定的极向和环形模型，将访问第二代和第三代引力波探测器的参数空间中的区域，并得出结论，扭曲环面模型可能是这些探测器的范围之外。极向场位形内部为II型超导体状态方程，或内部为高度无序磁场，而环形位形内部为极强的环形磁场（<?format ?> >1016 G）在引力波探测方面最有前途。
Magnetars have been proposed as sources of gravitational waves, potentially observable by current and future terrestrial gravitational-wave detectors. In this paper, we calculate the stochastic gravitational wave background generated by summing the contributions from all magnetars in the Universe, and we study its accessibility to the second- and third-generation gravitational-wave detector networks. We perform systematic scans of the parameter space in this model, allowing the magnetic field, the ellipticity, the initial period, and the rate of magnetars to vary over the currently believed range of values. We also consider different proposed configurations of the magnetic field (poloidal, toroidal, and twisted torus) and different proposed star-formation histories. We identify regions in the parameter space of poloidal and toroidal models that will be accessible to the second- and third-generation gravitational-wave detectors and conclude that the twisted-torus models are likely out of reach of these detectors. The poloidal field configuration with a type II superconductor equation of state in the interior, or with a highly disordered magnetic field, and the toroidal configuration with a very strong toroidal magnetic field in the interior (<?format ?>>1016 G) are the most promising in terms of gravitational-wave detection.