Companion-launched jets and their effect on the dynamics of common envelope interaction simulations
Companion-launched jets and their effect on the dynamics of common envelope interaction simulations
复制标题
伴随发射的喷气机及其对共同包络相互作用模拟动力学的影响
DOI：
10.1093/mnras/stz2013
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发表时间：
2019
影响因子：
4.8
通讯作者：
Soker Noam
中科院分区：
文献类型：
--
作者：
Shiber Sagiv;Iaconi Roberto;De Marco Orsola;Soker Noam
我们进行三维流体动力学模拟的共同信封二进制的相互作用，并表明，如果同伴发射喷气机，而与巨大的主要星星的信封，喷气机将删除信封的气体的相当大的一部分。我们使用的设置和数字代码的一个早期的共同信封研究，不包括喷流，与0.88-M的，83-R的红巨星星星和0.3-M的伴星。假设是伴星星星通过吸积盘吸积质量，该吸积盘负责发射喷射流，在模拟中，喷射流是数值注入的。这是我们第一次进行模拟，其中包括喷气机以及由螺旋形核心伴星系统释放的引力能。我们发现，模拟与射流unbind约三倍的信封质量比相同的模拟，不包括射流，虽然未结合气体的总分数仍然低于50%，这些特定的模拟。喷流产生极方向的高速外流。喷流还增加了最终的核心伴星轨道分离，并导致核心伴星双星系统的反冲速度。我们的研究结果表明，如果能够形成，射流可以发挥至关重要的作用，在喷射信封和塑造外流。
We conduct three-dimensional hydrodynamic simulations of the common envelope binary interaction and show that if the companion were to launch jets while interacting with the giant primary star’s envelope, the jets would remove a substantial fraction of the envelope’s gas. We use the set-up and numerical code of an earlier common envelope study that did not include jets, with a 0.88-M⊙, 83-R⊙red giant star and a 0.3-M⊙companion. The assumption is that the companion star accretes mass via an accretion disc that is responsible for launching the jets which, in the simulations, are injected numerically. For the first time we conduct simulations that include jets as well as the gravitational energy released by the inspiralling core-companion system. We find that simulations with jets unbind approximately three times as much envelope mass than identical simulations that do not include jets, though the total fraction of unbound gas remains below 50 per cent for these particular simulations. The jets generate high-velocity outflows in the polar directions. The jets also increase the final core-companion orbital separation and lead to a kick velocity of the core-companion binary system. Our results show that, if able to form, jets could play a crucial role in ejecting the envelope and in shaping the outflow.