论文标题
来自磁中微子主导的积聚盘的中微子和重力波与磁耦合
Neutrinos and gravitational waves from magnetized neutrino-dominated accretion discs with magnetic coupling
论文作者
论文摘要
伽马射线爆发（GRB）可能是通过Blandford-Znajek（BZ）机制或中微子歼灭的黑洞（BH）超振动系统为中微子主导的增生流（NDAFS）提供动力的。内盘和BH之间的磁耦合（MC）可以将角动量和能量从快速旋转的BH传递到圆盘。中微子的光度和中微子歼灭光度都可以通过MC过程有效增强。在本文中，我们研究了BZ和MC机理都存在的磁化NDAFS（MNDAFS）的结构，光度，MEV中微子和重力波（GWS）。结果指出，BZ机制将与中微子歼灭的光度竞争，以在两种磁性机制的不同分区下触发喷气机。 MNDAF的典型中微子发光度和an灭光度肯定高于NDAF。 MNDAF的中微子光谱的典型峰值能高于NDAF的峰值能量，但类似于核心偏离超新星的峰值。此外，如果MC过程占主导地位，则源自各向异性中微子的发射的GWS将更强，特别是对于具有较高积聚速率的光盘。
Gamma-ray bursts (GRBs) might be powered by a black hole (BH) hyperaccretion systems via the Blandford-Znajek (BZ) mechanism or neutrino annihilation from neutrino-dominated accretion flows (NDAFs). Magnetic coupling (MC) between the inner disc and BH can transfer angular momentum and energy from the fast-rotating BH to the disc. The neutrino luminosity and neutrino annihilation luminosity are both efficiently enhanced by the MC process. In this paper, we study the structure, luminosity, MeV neutrinos, and gravitational waves (GWs) of magnetized NDAFs (MNDAFs) under the assumption that both the BZ and MC mechanisms are present. The results indict that the BZ mechanism will compete with the neutrino annihilation luminosity to trigger jets under the different partitions of the two magnetic mechanisms. The typical neutrino luminosity and annihilation luminosity of MNDAFs are definitely higher than those of NDAFs. The typical peak energy of neutrino spectra of MNDAFs is higher than that of NDAFs, but similar to those of core-collapse supernovae. Moreover, if the MC process is dominant, then the GWs originating from the anisotropic neutrino emission will be stronger particularly for discs with high accretion rates.
