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arXiv 2603.26641astro-ph.HEgr-qc
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反冲几何决定超大质量黑洞合并残骸的电磁 counterpart

Recoil geometry determines electromagnetic counterparts from supermassive black hole merger remnants

Princeton University(普林斯顿大学);California Institute of Technology(加州理工学院)

Yoonsoo Kim, Elias R. Most, Hai-Yang Wang

AI总结:

研究探讨反冲几何对超大质量黑洞合并后电磁信号的影响,通过相对论磁流体力学模拟揭示不同反冲方向下的喷流和盘行为差异,为多信使观测提供理论支持。

摘要:

嵌入气体环境中的双黑洞合并,如气体丰富星系合并后的超大质量黑洞双星,是未来空间引力波探测时代多信使瞬变源的有希望来源。如果合并残骸获得引力辐射反冲,随后反冲黑洞与其环二星盘的相互作用可能导致独特的合并后电磁信号。我们首次进行了广义相对论磁流体力学模拟,研究反冲黑洞与磁性冻结环二星盘的相互作用,追踪其从 inspiral 阶段的演变。我们显示,合并后吸积动力学,取决于反冲几何,表现出截然不同的喷流和盘行为。对于垂直于盘的反冲,内盘保持引力束缚并维持相对论喷流,而平面内反冲导致大量激波加热和潜在喷流淬灭。相反,倾斜反冲由于引入的盘倾斜产生间歇性喷流-盘相互作用。这些电磁信号的多波段监测,结合同时发生的引力波探测,将有助于表征合并环境的物理条件。

英文摘要:

Merging binary black holes embedded in gaseous environments, such as supermassive black hole binaries following gas-rich galaxy mergers, are promising sources of multi-messenger transients in the upcoming age of space-based gravitational wave detections. In case a gravitational radiation recoil is imparted to the merger remnant, subsequent interactions between the recoiled black hole and its circumbinary disk may lead to unique post-merger electromagnetic counterparts. We present the first general relativistic magnetohydrodynamic simulations of a recoiling black hole interacting with a magnetically arrested circumbinary disk the evolution of which has been consistently tracked through the inspiral phase. We show that the post-merger accretion dynamics, depending on the recoil geometry, exhibits qualitatively disparate jet and disk behavior. For recoils perpendicular to the disk, the inner disk remains gravitationally bound and sustains relativistic jets, while in-plane recoils lead to copious shock heating and potential jet quenching for black holes directly colliding with the disk. Oblique recoils, on the other hand, produce intermittent outbursts from jet-disk interactions owing to the tilt introduced in the accretion disk. Multi-wavelength monitoring of these electromagnetic counterparts, in conjunction with the coincident gravitational wave detection, will be able to aid in characterizing the physical conditions of the merger environment.

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