论文标题
关于从观测I：恒星形成速率和运动学确定星系特性的生存能力
On the Viability of Determining Galaxy Properties from Observations I: Star Formation Rates and Kinematics
论文作者
论文摘要
我们探讨了通过使用LCARS（来自Cloudy添加的光线中的Light from from from添加到Ramses的光）中，将观察结果与发射星系的物理特性有关，从而将一对合并的$ z \ sim2 $星系与宇宙学，流体动力学模拟Newhorizon（从clabses中添加到Clundy中）进行编码，以将模拟的Galaxy的物理特性编码为H $ $ a $ a $ a $α$α$α$α$α$。通过对这些数据立方体进行模拟观察和分析，我们可以确定在欧洲极大望远镜（ELT）上的Harmoni光谱仪中可以回收银河系的哪种物理特性。我们能够估计银河系的恒星形成速率和动态质量的准确度，其值在1.81美元$ 1.81 $和$ 1.38 $的$ 1.38 $中。在模拟观察中还恢复了星系的运动学结构。此外，我们能够恢复速度色散的径向曲线，因此能够计算动力比的变化是距离星系中心的距离的函数。最后，我们表明，当根据星系尺度计算时，动力比并不总是提供对重力的星系稳定性的可靠度量，或者充当次要合并的指标。
We explore how observations relate to the physical properties of the emitting galaxies by post-processing a pair of merging $z\sim2$ galaxies from the cosmological, hydrodynamical simulation NewHorizon using LCARS (Light from Cloudy Added to RAMSES) to encode the physical properties of the simulated galaxy into H$α$ emission line. By carrying out mock observations and analysis on these data cubes we ascertain which physical properties of the galaxy will be recoverable with the HARMONI spectrograph on the European Extremely Large Telescope (ELT). We are able to estimate the galaxy's star formation rate and dynamical mass to a reasonable degree of accuracy, with values within a factor of $1.81$ and $1.38$ of the true value. The kinematic structure of the galaxy is also recovered in mock observations. Furthermore, we are able to recover radial profiles of the velocity dispersion and are therefore able to calculate how the dynamical ratio varies as a function of distance from the galaxy centre. Finally, we show that when calculated on galaxy scales the dynamical ratio does not always provide a reliable measure of a galaxy's stability against gravity or act as an indicator of a minor merger.
