发表机构
Technion - Israel Institute of Technology（以色列理工学院）
机构由 AI 辅助整理，请以论文原文为准。AI 中文总结
研究核心坍缩超新星抖动喷流爆炸机制中长寿命间歇性吸积盘的形成，通过粘性驱动角动量传输和喷流阻止极向吸积延长盘寿命，增加JJEM可解释的形态种类，强化其作为CCSN主要爆炸机制的地位。
AI 中文摘要
基于对核心坍缩超新星（CCSN）遗迹的观测，其中一到三对高能喷流主导了CCSN遗迹形态及爆炸能量。在抖动喷流爆炸机制（JJEM）框架下研究长寿命间歇性吸积盘的形成。在JJEM中，喷流对会引爆所有CCSN。多数情况下，坍缩前核心对流区的随机角动量波动引发新生中子星上方的不稳定性，形成间歇性吸积盘，其发射多对喷流使恒星爆炸。具有1 - 3对高能喷流特征的CCSN遗迹需要长寿命间歇性吸积盘。研究表明盘内粘性驱动的角动量传输及喷流阻止物质从极向吸积可延长盘寿命，这两个正反馈过程及波动能大幅延长此类吸积盘寿命，进而发射高能喷流对。该研究增加了JJEM能解释的形态种类，强化了JJEM作为CCSN主要爆炸机制的地位。
英文摘要
Motivated by observations of core-collapse supernova (CCSN) remnants that suggest cases where one to three energetic pairs of jets dominate the CCSN remnant morphology and, hence, the CCSN explosion energy, I examine the formation of long-lived intermittent accretion disks that launch such pairs of energetic jets in the framework of the jittering-jets explosion mechanism (JJEM). In the JJEM, pairs of jets explode all CCSNe. In most CCSNe, stochastic angular momentum fluctuations in the convective zones of the pre-collapse core seed instabilities above the newly born neutron star that lead to the formation of intermittent accretion disks. These disks launch several to about twenty pairs of jets that explode the star. CCSNRs with signatures of 1-3 very energetic pairs of jets require long-lived, intermittent accretion disks. I quantitatively show that viscosity-driven angular momentum transport in the disk can prolong its lifetime even when material with zero angular momentum continues to feed the disk. Other effects that I do not study here can also prolong the disk lifetime somewhat: jets might prevent matter from accreting from the polar direction, and angular momentum fluctuations can, in some cases, add up to a positive angular momentum. The viscosity mechanism I study here, along with these other effects, can prolong the lifetime of 1-3 intermittent accretion disks (or none), which then launch energetic jet pairs. This study adds to the wide variety of morphologies that the JJEM can explain, somewhat supporting the claim that the JJEM is the primary explosion mechanism of CCSNe.
CommentsAccepted by Revista Mexicana de Astronomia y Astrofisica
