发表机构
School of Science, Jiangsu University of Science and Technology（江苏科技大学理学院）
机构由 AI 辅助整理，请以论文原文为准。AI 中文总结
本研究建立框架分析磁重联外流对Kerr黑洞薄吸积盘的加热效应，发现其贡献随自旋增大而减小、随磁化强度和外流径向速度增大而增大，为吸积盘提供额外能量与角动量来源。
AI 中文摘要
黑洞附近的磁重联过程可以高效地将磁能转化为等离子体外流的动能和热能，从而能够提取自旋黑洞的转动能。然而，其对周围吸积盘的影响尚未得到充分探索。在本工作中，我们建立了一个框架来研究磁重联外流等离子体对Kerr黑洞周围薄吸积盘的“加热”效应。我们将重联外流的能量通量和角动量通量作为附加源项纳入盘守恒定律，从而得到修正的辐射通量。我们研究了修正辐射通量对黑洞自旋、重联半径、等离子体磁化强度和外流方向的依赖关系。对于固定的磁场构型，重联外流等离子体对修正辐射通量的贡献随黑洞自旋的增加而减小。其对重联半径的依赖在能层内外有所不同：在能层内部，较小的半径通过更有效地提取黑洞转动能而增强盘加热；而在能层外部，较大的半径由于外流的径向稀释减弱而产生更强的加热。重联外流等离子体的贡献还随等离子体磁化强度和外流速度的径向分量的增加而增大。我们的结果表明，磁重联可以为相对论性吸积盘提供额外的能量和角动量来源，在旋转黑洞附近的等离子体过程与可观测的吸积盘性质之间建立了联系，为强引力场区域提供了新的视角。
英文摘要
The magnetic reconnection process near a black hole can efficiently convert magnetic energy into the kinetic and thermal energy of plasma outflows, enabling the extraction of rotational energy from a spinning black hole. However, its impact on the surrounding accretion disk remains insufficiently explored. In this work, we develop a framework to investigate the 'heating' effect of magnetic reconnection outflow plasma on thin accretion disks around Kerr black holes. We incorporate the energy and angular momentum fluxes of reconnection outflow into the disk conservation laws as additional source terms, yielding a modified radiative flux. We investigate the dependence of the modified radiative flux on the black hole spin, reconnection radius, plasma magnetization, and outflow orientation. For a fixed magnetic field prescription, the contribution of the reconnection outflow plasma to the modified radiative flux decreases as the black hole spin increases. Its dependence on the reconnection radius differs inside and outside the ergosphere: inside, a smaller radius enhances disk heating through more efficient extraction of black hole rotational energy, whereas outside, a larger radius produces stronger heating due to reduced radial dilution of the outflow. The reconnection outflow plasma contribution also increases with plasma magnetization and the radial component of the outflow velocity. Our results demonstrate that magnetic reconnection can provide an additional source of energy and angular momentum for relativistic accretion disks, establishing a connection between plasma processes near rotating black holes and the observable accretion disk properties, providing a new perspective on the strong gravitational field regime.
Comments12 pages, 4 figures
