论文标题

灾难性变量中的喷气机的情况

The case for jets in cataclysmic variables

论文作者

Coppejans, Deanne, Knigge, Christian

论文摘要

数十年来,灾难性变量(CVS)被认为是少数几类积聚的紧凑型物体以不发射喷气机的,因此被用来限制喷气发射模型。但是,最近的理论和观察性进步表明,CVS实际上发射了喷气机。具体而言,已经证明他们的吸积流循环类似于其较高的质量表兄弟 - X射线二进制文件(XRBS)。随后对CV SS Cygni的观察结果证实了这一点,并始终显示出与标记瞬态射流的XRB中相当的无线电耀斑。基于这一发现和排放特性,几项研究得出结论,无线电发射很可能来自瞬态射流。对其他简历的观察虽然不是结论性的,但与这种解释是一致的。但是,问题尚未解决。后来的观察结果提出了有关该模型的许多问题,以及潜在的替代无线电发射机制。简历是非依赖性的,许多CV具有确定的距离。这些特性将使它们成为理想的候选人,以解决我们许多有关基本喷气物理学的杰出问题。在这里,我们在简历中审查了喷气机的案例,讨论杰出的问题和问题,并概述了最终回答CVS是否启动喷气机所必需的未来工作。

For decades cataclysmic variables (CVs) were thought to be one of the few classes of accreting compact objects to not launch jets, and have consequently been used to constrain jet launching models. However, recent theoretical and observational advances indicate that CVs do in fact launch jets. Specifically, it was demonstrated that their accretion-outflow cycle is analogous to that of their higher mass cousins -- the X-ray Binaries (XRBs). Subsequent observations of the CV SS Cygni confirmed this and have consistently shown radio flaring equivalent to that in the XRBs that marks a transient jet. Based on this finding and the emission properties, several studies have concluded that the radio emission is most likely from a transient jet. Observations of other CVs, while not conclusive, are consistent with this interpretation. However, the issue is not yet settled. Later observations have raised a number of questions about this model, as well as about potential alternative radio emission mechanisms. CVs are non-relativistic and many have well-determined distances; these properties would make them ideal candidates with which to address many of our outstanding questions about fundamental jet physics. Here we review the case for jets in CVs, discuss the outstanding questions and issues, and outline the future work necessary to conclusively answer the question of whether CVs launch jets.

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