标题： 电离光子光度函数的演化 显示英文标题

标题： Evolution of the Ionizing Photon Luminosity Function

摘要： 计算红移至 z ~ 1.2 的电离辐射源的数量和亮度将彻底改变我们对电离背景如何由超星系结构的嵌入式增长所产生的理解和持续的认识。 为了高效构建红移分箱的光度函数，所需稀疏分离的目标数量规模巨大，这推动了需要低光谱分辨率多目标光谱学 (MOS) 的需求，其短波长截止点 ~ 1000 {\AA }，远紫外区域的灵敏度优于 30 abmag，并且瞬时视场 ~ (2')$^2$。 在宜居世界观测站上的 MOS 是唯一可能执行如此雄心勃勃观测计划的仪器。 该计划将量化由星系产生的电离辐射中有多少被中间中性 H、He 和尘埃所衰减，以及有多少逃逸以维持宇宙处于大部分电离的状态。 显示英文摘要

摘要： Counting the number and brightness of ionizing radiation sources out to a redshift of z ~ 1.2 will revolutionize our understanding of how the ionizing background is created and sustained by the embedded growth of meta-galactic structures. The sheer number of sparsely separated targets required to efficiently construct redshift binned luminosity functions is industrial in scale, driving the need for low spectral resolution multi-object spectroscopy (MOS) with a short wavelength cut-off ~ 1000 {\AA}, a sensitivity in the far-UV to better than 30 abmag, and an instantaneous field-of-view ~ (2')$^2$. A MOS on Habitable Worlds Observatory is the only instrument that could conceivably carry out such an ambitious observing program. This program will quantify how much of the ionizing radiation produced by galaxies is attenuated by intervening neutral H, He and dust, and how much escapes to maintain the universe in a mostly ionized state.