Electromagnetic Precursors to Black Hole–Neutron Star Gravitational Wave Events: Flares and Reconnection-powered Fast Radio Transients from the Late Inspiral
Electromagnetic Precursors to Black Hole–Neutron Star Gravitational Wave Events: Flares and Reconnection-powered Fast Radio Transients from the Late Inspiral
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DOI：
10.3847/2041-8213/acfdae
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发表时间：
2023-09
期刊：
影响因子：
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通讯作者：
E. Most;A. Philippov
中科院分区：
文献类型：
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作者：
E. Most;A. Philippov
黑洞-中子星双星的晚期螺旋中存在的磁场可能会导致潜在的可检测到的电磁前兆瞬变。利用广义相对论无力电动力学模拟，我们研究了黑洞-中子星系统共同磁层的合并前相互作用。我们证明这些系统可以具有丰富的电磁耀斑活动，我们发现这取决于磁场方向而不是黑洞自旋。由于与周围磁层的相互作用，这些耀斑可能导致快速无线电爆发瞬变和 X 射线发射，其中 EM≲1041B*/1012G2ergs−1 作为光度上限，其中 B * 是中子星表面的磁场强度。
The presence of magnetic fields in the late inspiral of black hole–neutron star binaries could lead to potentially detectable electromagnetic precursor transients. Using general-relativistic force-free electrodynamics simulations, we investigate premerger interactions of the common magnetosphere of black hole–neutron star systems. We demonstrate that these systems can feature copious electromagnetic flaring activity, which we find depends on the magnetic field orientation but not on black hole spin. Due to interactions with the surrounding magnetosphere, these flares could lead to fast-radio-burst-like transients and X-ray emission, with EM≲1041B*/1012G2ergs−1 as an upper bound on the luminosity, where B * is the magnetic field strength on the surface of the neutron star.