论文标题
红色星系星系的冷气和灰尘特性
The cold gas and dust properties of red star-forming galaxies
论文作者
论文摘要
我们研究了称为“红色不合适”的红色星系样品样本的冷气和尘埃特性。我们收集了来自低红移星系的代表性样本以及我们自己的JCMT CO观察到红色不合适的观察结果。我们还获得了这些星系子集的水肺-2 850 UM观测值。通过这些数据，我们比较了红色不合适的分子气，总冷气和灰尘特性与使用生存分析技术考虑了非检测的蓝色对应物（“蓝色活跃物”）。我们比较了Log SFR-LOG M*平面中固定位置的这些属性，以及与星形成主序列相比的偏移。与蓝色活化分子相比，红色失调的分子气体消耗率略长，总气体消耗时间相似，分子量和总加速质量分数明显降低，较低的尘埃质量比，相似的尘埃气和气体比，并且在$ \ log m_ \ mathrm {mol} $ - $ - $ - $ - $ \ flape $ - $ \ \ \ m m \ m \ m \ m \ \ m \ m \ m \ m \ m \ \ m \ m \ m \ m \ \ m.我们的结果表明，由于天然气供应不足，红色的不符合人口可能会消失。
We study the cold gas and dust properties for a sample of red star forming galaxies called "red misfits." We collect single-dish CO observations and HI observations from representative samples of low-redshift galaxies, as well as our own JCMT CO observations of red misfits. We also obtain SCUBA-2 850 um observations for a subset of these galaxies. With these data we compare the molecular gas, total cold gas, and dust properties of red misfits against those of their blue counterparts ("blue actives") taking non-detections into account using a survival analysis technique. We compare these properties at fixed position in the log SFR-log M* plane, as well as versus offset from the star-forming main sequence. Compared to blue actives, red misfits have slightly longer molecular gas depletion times, similar total gas depletion times, significantly lower molecular- and total-gas mass fractions, lower dust-to-stellar mass ratios, similar dust-to-gas ratios, and a significantly flatter slope in the $\log M_\mathrm{mol}$-$\log M_\star$ plane. Our results suggest that red misfits as a population are likely quenching due to a shortage in gas supply.
