至少六分之一的Galerkin总是死了
At Least One-in-Six Galaxies Is Always Dead
摘要:
通过数值实验,我们表明,在$z>3$看到的$\sim$ 10%-20%的被动分数是一致的星系恒星形成的历史是最大相关的随机过程。如果是这样的话,这个分数应该反映了一个与时间无关的基线,在任何时期或质量制度下,平均恒星形成率都在上升。$\log M_\ast<10$和$z<0.5$的数据证实了这一点,詹姆斯·韦伯太空望远镜未来的观测也是如此。
英文摘要:
Via numerical experiments, we show that the $\sim$10%-20% passive fraction seen at $z>3$ is consistent with galaxy star formation histories being maximally correlated stochastic processes. If so, this fraction should reflect a time-independent baseline that holds at any epoch or mass regime where mean star formation rates are rising. Data at $\log M_\ast<10$ and $z<0.5$ bear this out, as should future James Webb Space Telescope observations.
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