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arXiv 0909.0187astro-ph.GA
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SPH模拟螺旋星系中HI线的合成观测

Synthetic Observations of the HI Line in SPH-Simulated Spiral Galaxies

Kevin A. Douglas, David Acreman, Clare Dobbs, Chris Brunt

摘要:

使用辐射转移代码Torus,我们从螺旋星系的全球SPH模拟中产生了预测的HI轮廓的谱线立方体。Torus使用自适应网格细化对SPH星系进行网格化,然后应用光线跟踪方法来推断沿视线的HI轮廓。网格星系可以从任何方向观察到,这使我们能够模拟任何方向的星系所观察到的HI轮廓。我们也可以把观测者放在银河系内,模拟从地球在银河系中的位置进行的HI观测。

英文摘要:

Using the radiative transfer code Torus, we produce spectral-line cubes of the predicted HI profile from global SPH simulations of spiral galaxies. Torus grids the SPH galaxy using Adaptive Mesh Refinement, then applies a ray-tracing method to infer the HI profile along the line(s) of sight. The gridded galaxy can be observed from any direction, which enables us to model the observed HI profile for galaxies of any orientation. We can also place the observer inside the galaxy, to simulate HI observations taken from the Earth's position in the Milky Way.

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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