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arXiv 1908.04582astro-ph.SRastro-ph.GA
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行星状星云Sh 2-71的三星起源

On the triple-star origin of the planetary nebula Sh 2-71

David Jones, Ondrej Pejcha, Romano L. M. Corradi

摘要:

最近的研究表明,三星系统可能在相当数量的行星状星云的形成中发挥了作用,但迄今为止只知道一颗三星中心星(该系统可能太宽,对其组成恒星的演化没有太大影响)。在这里,我们考虑的可能性,Sh 2-71是由一个三重系统,已分裂。我们提出了两个区域的发射,似乎与拟议的第三轨道(即在由先前在文献中考虑的两个候选中心恒星系统形成的轴线)的发现。我们还进行了几个简单的测试的三重假设的可验证性的基础上观察到的属性(坐标,径向速度,距离和自行车)的恒星观测到的星云的投影中心附近,通过响应质量损失的二进制轨道的数值积分增加进一步的支持。虽然仍有一些悬而未决的问题,我们的结论是,Sh 2-71是目前最好的候选人之一,行星状星云的形成受三星相互作用。

英文摘要:

Recent studies have indicated that triple star systems may play a role in the formation of an appreciable number of planetary nebulae, however only one triple central star is known to date (and that system is likely too wide to have had much influence on the evolution of its component stars). Here, we consider the possibility that Sh 2-71 was formed by a triple system which has since broken apart. We present the discovery of two regions of emission, seemingly aligned with the proposed tertiary orbit (i.e. in line with the axis formed by the two candidate central star systems previously considered in the literature). We also perform a few simple tests of the plausibility of the triple hypothesis based on the observed properties (coordinates, radial velocities, distances and proper motions) of the stars observed close to the projected centre of the nebula, adding further support through numerical integrations of binary orbits responding to mass loss. Although a number of open questions remain, we conclude that Sh 2-71 is currently one of the best candidates for planetary nebula formation influenced by triple-star interactions.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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