论文标题
从磁中微子冷却的积聚磁盘研究后流出后流出
Studying Postmerger Outflows from Magnetized Neutrino-cooled Accretion Disks
论文作者
论文摘要
由紧凑的二进制合并产生的旋转黑洞周围的中微子冷却积聚流是喷气式形成和发射磁驱动的流出的有前途的场景。基于Ligo和处女座观测值的GW170817重力波检测，然后是电磁对应物，该模型可以解释短持续时间伽马射线爆发（GRB）和Kilonova辐射的中心发动机。使用开源GRMHD Harm-Cool代码，我们在固定弯曲的时空背景中进化了几个具有现实状态方程的2D磁化积分磁盘黑色孔模型。我们应用了粒子示踪技术来测量流出的特性。选择磁盘和黑洞的初始参数以一种表示合并紧凑对象的合并后场景的方式。我们的模拟显示了黑洞的自旋和弹出质量之间的密切相关性。通常，合并产生大型磁盘和快速旋转的黑洞会引起更强的流出。我们观察到我们的模型产生的风速（$ v/c \ sim 0.1-0.2 $）和广泛的电子分数。我们使用这些结果来估算此类系统发出的可能放射性瞬态的光度和光曲线。我们发现亮度在$ 10^{40} -10^{42} $ erg/s的范围内，这与先前有关磁盘风流的研究一致。
Neutrino-cooled accretion flow around a spinning black hole, produced by a compact binary merger is a promising scenario for jet formation and launching magnetically-driven outflows. Based on GW170817 gravitational wave detection by LIGO and Virgo observatories followed by electromagnetic counterparts, this model can explain the central engine of the short duration gamma ray bursts (GRB) and kilonova radiations. Using the open-source GRMHD HARM-COOL code, we evolved several 2D magnetized accretion disk-black hole models with realistic equation of state in the fixed curved space-time background. We applied particle tracer technique to measure the properties of the outflows. The disk and black hole's initial parameters are chosen in a way to represent different possible post-merger scenarios of the merging compact objects. Our simulations show a strong correlation between black hole's spin and ejected mass. Generally, mergers producing massive disks and rapidly spinning black holes launch stronger outflows. We observed our models generate winds with moderate velocity ($v/c \sim 0.1-0.2$), and broad range of electron fraction. We use these results to estimate the luminosity and light curves of possible radioactively powered transients emitted by such systems. We found the luminosity peaks within the range of $10^{40}-10^{42}$ erg/s which agrees with previous studies for disk wind outflows.
