论文标题
第一个大型星系的灰尘排放
Dust emission from the first massive galaxies
论文作者
论文摘要
我们比较了观察到的far-in-incrared（fir）星系光谱能量分布（SED）$ z \ sim6 $和对第一大群众II（POP II）星系的理论预测。与$ z \ sim3 $相比，观察到的$ z \ gtrsim5 $的FIR SED宽阔，转向蓝色波长。通过实施来自POP II大型星系的尘埃发射的分析模型，我们能够重现观察到的行为，这是由于高能密度和高$ Z $模型星系的富含硅酸盐粉尘组成的结果。如先前的工作中所述，在解释FIR灯光测量值时，应考虑到$ z \ sim 6 $的星系SED的非黑体性质，以避免低估恒星形成率。
We compare observed far-infrared (FIR) galaxy spectral energy distributions (SEDs) at $z\sim6$ and theoretical predictions for first massive population II (Pop II) galaxies. Observed FIR SEDs at $z\gtrsim5$ are broad and shifted to bluer wavelengths when compared to galaxies at $z\sim3$. By implementing an analytical model for dust emission from Pop II massive galaxies,we were able to reproduce the observed behaviour as a consequence of the high energy densities and silicate-rich dust composition of high-$z$ model galaxies. As noted in a previous work, the non-blackbody nature of galaxy SEDs at $z \sim 6$ should be taken into account when interpreting measurements of FIR luminosities to avoid underestimating star formation rates.
