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arXiv 2203.08672astro-ph.GAgr-qcmath-phmath.MP
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旋涡星系的建模

Modelling Spiral Galaxies

Joachim Frenkler

AI总结:

我们提出一种新技术,为旋涡星系模型赋予自洽动力学,并应用于银河系,模拟出四旋臂结构,通过金斯不稳定性解释原子氢速度弥散,且模型中的冷暗物质体现了博斯玛效应。

摘要:

我们开发了一种新技术,为旋涡星系模型配备与观测相符的自洽动力学。我们应用该技术,构建了一个具有动力学星际介质(ISM)的银河系模型。在模拟中,从该模型中涌现出四旋臂结构,与银河系ISM中观测到的结构相似。此外,在我们的模型中,金斯不稳定性为ISM中原子氢的观测速度弥散提供了解释;如果我们选择略高于观测值的速度弥散,这种不稳定性就会从模型中消失。我们的模型使用重子暗物质,它位于盘内且动力学上寒冷。这使得我们的模型成为博斯玛效应的典型例子。

英文摘要:

We develop a new technique to equip models of spiral galaxies with self-consistent dynamics that match observations. We apply our technique and construct a model for the Milky Way with a dynamical interstellar medium (ISM). In simulations a four-arm spiral structure emerges from this model that is similar to the one observed in the Milky Way's ISM. Further, in our model the Jeans instability offers an explanation for the observed velocity dispersion of atomic hydrogen in the ISM; this instability vanishes from our model if we choose a velocity dispersion just above the observed one. Our model uses baryonic, dark matter, which resides in the disc and is dynamically cold. This makes our model a typical example for the Bosma effect.

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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