论文标题
与磁耦合的中微子主导的积聚流的相对论全球解决方案
Relativistic global solutions of neutrino-dominated accretion flows with magnetic coupling
论文作者
论文摘要
一个被中微子主导的积聚流（NDAF）包围的Kerr黑洞（BH）是中央发动机的合理候选者之一。积聚材料可能会从紧凑的对象合并或大量折叠术中继承和重组强磁场。快速旋转BH和积聚盘之间的磁耦合（MC）过程是可能将能量和角动量从BH转移到圆盘的可能磁性构型之一。在本文中，我们研究了使用MC（McNDAFS）的NDAF的一维整体解决方案，考虑到一般相对论效应，详细的中微子物理学，不同的MC几何形状和合理的核合成过程。提出了六个具有不同积聚率和磁场幂指数的病例，并与没有MC的NDAF进行了比较。我们的结果指出，MC过程可以显着影响MCNDAF的结构，热性质和微物理学，增加中微子的亮度及其歼灭，从而导致核子的径向分布的变化，并将重核核的区域推向较大的NDAFS中的繁重核syalthesesis的区域。
A Kerr black hole (BH) surrounded by a neutrino-dominated accretion flow (NDAF) is one of plausible candidates of the central engine in gamma-ray bursts. The accretion material might inherit and restructure strong magnetic fields from the compact object mergers or massive collapsars. The magnetic coupling (MC) process between a rapid rotating BH and an accretion disc is one of possible magnetic configurations that transfers the energy and angular momentum from the BH to the disc. In this paper, we investigate one-dimensional global solutions of NDAFs with MC (MCNDAFs), taking into account general relativistic effects, detailed neutrino physics, different MC geometries, and reasonable nucleosynthesis processes. Six cases with different accretion rates and power-law indices of magnetic fields are presented and compared with NDAFs without MC. Our results indict that the MC process can prominently impact the structure, thermal properties, and microphysics of MCNDAFs, increase luminosities of neutrinos and their annihilations, result in the changing of radial distributions of nucleons, and push the region of heavy nuclei synthesis to a larger radius than counterparts in NDAFs.
