论文标题
中子星的磁铁 - 白矮人合并：应用于快速无线电爆发
Magnetars from Neutron Star--White Dwarf Mergers: Application to Fast Radio Bursts
论文作者
论文摘要
人们普遍认为，磁铁可能出生在核心溢出的超新星（SNE），二进制中子星（BNS）或二进制白色矮人（BWD）合并或增生诱导的白矮人的崩溃（AIC）中。在本文中，我们研究了是否也可以从中子恒星（NSWD）合并中产生磁铁，这是由FRB 180924的驱动的类似于Bns/bns/bwd/aic通道中的磁铁的FRB 180924样快速无线电爆发（FRB）的动机。通过初步计算，我们发现，具有不稳定传质的NSWD合并可能导致NS通过磁发机制，通过差异旋转和对流或可能通过化石场的磁通量保护方案获取超强磁场。如果NSWD合并确实可以创建磁铁，那么此类对象可以在耀斑磁铁的框架内至少产生FRB 180924型FRB的一部分，因为弹出，本地环境和最终残留物的宿主星系来自NSWD合并的最终残留物，类似于BNS/BWD/BWD/AIC通道。该NSWD通道还能够很好地解释FRB 180924样和FRB 180916.J0158+65型FRB在本地环境和宿主星系中的较大范围内的观察性质。
It is widely believed that magnetars could be born in core-collapse supernovae (SNe), binary neutron star (BNS) or binary white dwarf (BWD) mergers, or accretion-induced collapse (AIC) of white dwarfs. In this paper, we investigate whether magnetars could also be produced from neutron star--white dwarf (NSWD) mergers, motivated by FRB 180924-like fast radio bursts (FRBs) possibly from magnetars born in BNS/BWD/AIC channels suggested by \cite{mar19}. By a preliminary calculation, we find that NSWD mergers with unstable mass transfer could result in the NS acquiring an ultra-strong magnetic field via the dynamo mechanism due to differential rotation and convection or possibly via the magnetic flux conservation scenario of a fossil field. If NSWD mergers can indeed create magnetars, then such objects could produce at least a subset of FRB 180924-like FRBs within the framework of flaring magnetars, since the ejecta, local environments, and host galaxies of the final remnants from NSWD mergers resemble those of BNS/BWD/AIC channels. This NSWD channel is also able to well explain both the observational properties of FRB 180924-like and FRB 180916.J0158+65-like FRBs within a large range in local environments and host galaxies.
