发表机构
Technion - Israel Institute of Technology; Kinneret College on the Sea of Galilee（以色列理工学院; 加利利海金纳雷特学院）
机构由 AI 辅助整理，请以论文原文为准。AI 中文总结
本研究通过分析仙后座A遗迹的环状结构和三维模拟，提出不等能量喷流对通过kick-BEAP机制赋予中子星约400公里/秒的踢出速度，并支持抖动喷流爆炸机制。
AI 中文摘要
我们分析了仙后座A核坍缩超新星遗迹（CCSNR）的观测数据，识别出一对相反的环状结构，并将其形成归因于不等能量的爆炸喷流，这些喷流还通过踢出-早不对称喷流对（kick-BEAP）机制赋予了中子星（NS）其踢出速度。我们通过三维流体动力学模拟复制了这些环状结构的形成，这些结构被我们识别为喷流周围环（circum-jet rings），模拟中两个相反的爆炸喷流中，北向喷流强大得多，形成了更大的北向环，即已知的“皇冠”（Crown）。连接这两个相反环中心的直线穿过先前确定的仙后座A的点对称中心。两个喷流之间的动量差也解释了观测到的约400公里/秒的南向中子星踢出速度。kick-BEAP机制和点对称形态表明，爆炸过程中有多对喷流提供能量并塑造形态，这加强了抖动喷流爆炸机制对仙后座A CCSNR及一般核坍缩超新星的解释力。
英文摘要
We analyze observations of the Cassiopeia A core-collapse supernova remnant (CCSNR) and identify a pair of opposite rings, attributing their formation to unequal-energy explosion jets that also imparted the neutron star (NS) its kick velocity via the kick-BEAP (kick by early asymmetrical pair of jets) mechanism. We replicate the formation of these ring structures, which we identify as circum-jet rings, with three-dimensional hydrodynamical simulations of two opposite explosion jets in which the northern jet is much more powerful, forming the larger northern ring known as the Crown. The line connecting the centers of the two opposite rings passes through the previously-established point-symmetric center of Cassiopeia A. The momentum difference between the two jets also explains the observed southwards NS kick velocity of ~400 km/s. The kick-BEAP and point-symmetric morphology suggest powering and shaping by several pairs of jets during the explosion process, strengthening the jittering jets explosion mechanism for the Cassiopeia A CCSNR and core-collapse supernovae in general.
CommentsUpdated references following reader comments. 16 pages, 8 figures. Comments welcome
