早期宇宙中Galerkin的光度学性质
The Photometric Properties of Galaxies in the Early Universe
摘要：
我们使用大型宇宙流体动力学模拟BlueTides来预测星系在再电离时期（$z=8-15$）的光度特性。这些特性包括静止坐标系紫外到近红外的宽带光谱能量分布、莱曼连续谱光子产生、紫外恒星形成率校准和内禀紫外连续谱斜率。特别是，我们专注于探索各种建模假设的效果，包括假设选择的恒星星族合成模型，初始质量函数，和莱曼连续光子的逃逸分数，对这些数量。我们发现，这些建模的假设可以有一个戏剧性的影响，导致后果的准确测定的物理性质的观测光度特性。例如，在$z=8$，我们预测星云发射可以解释高达$50\%$的静止框架$R$ -波段光度，而恒星星族合成模型的选择可以改变莱曼连续生产率高达$\times 2$的一个因素。
英文摘要：
We use the large cosmological hydro-dynamic simulation BlueTides to predict the photometric properties of galaxies during the epoch of reionisation ($z=8-15$). These properties include the rest-frame UV to near-IR broadband spectral energy distributions, the Lyman continuum photon production, the UV star formation rate calibration, and intrinsic UV continuum slope. In particular we focus on exploring the effect of various modelling assumptions, including the assumed choice of stellar population synthesis model, initial mass function, and the escape fraction of Lyman continuum photons, upon these quantities. We find that these modelling assumptions can have a dramatic effect on photometric properties leading to consequences for the accurate determination of physical properties from observations. For example, at $z=8$ we predict that nebular emission can account for up-to $50\%$ of the rest-frame $R$-band luminosity, while the choice of stellar population synthesis model can change the Lyman continuum production rate up to a factor of $\times 2$.
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