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arXiv 0905.0431astro-ph.GA
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盘-晕联接的理论与模型

Theory and Models of the Disc-Halo Connection

D. Breitschwerdt, M. A. de Avillez, V. Baumgartner, V. A. Dogiel

摘要:

我们回顾的星际介质在盘星系的演化,并显示,无论是分析和数值3D流体动力学模拟,盘晕连接是理解恒星形成星系的演化的一个重要组成部分。根据下面的气体盘的恒星形成率,建立了一个星系喷泉。如果恒星形成率足够高,或者宇宙射线与热等离子体耦合良好,就会形成星系风,导致星系长期质量损失。这样的风在边缘星系的软X射线光谱上留下了独特的印记,延迟复合是其显着特征之一。我们认为,合成光谱,从自洽的动力学和热模拟的银河系外流,应被视为平等的基础上观察到的光谱。我们表明,这是可能的,因此,成功地适合星暴星系NGC 3079的光谱。

英文摘要:

We review the evolution of the interstellar medium in disc galaxies, and show, both analytically and by numerical 3D hydrodynamic simulations, that the disc-halo connection is an essential ingredient in understanding the evolution of star forming galaxies. Depending on the star formation rate of the underlying gaseous disc, a galactic fountain is established. If the star formation rate is sufficiently high and/or cosmic rays are well coupled to the thermal plasma, a galactic wind will be formed and lead to a secular mass loss of the galaxy. Such a wind leaves a unique imprint on the soft X-ray spectra in edge-on galaxies, with delayed recombination being one of its distinctive features. We argue that synthetic spectra, obtained from self-consistent dynamical and thermal modelling of a galactic outflow, should be treated on an equal footing as observed spectra. We show that it is thus possible to successfully fit the spectrum of the starburst galaxy NGC 3079.

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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