标题： SILCC -- 第八篇: 远紫外辐射对恒星形成和星际介质的影响 显示英文标题

标题： SILCC -- VIII: The impact of far-ultraviolet radiation on star formation and the interstellar medium

摘要： 我们展示了在多相星际介质中恒星形成的磁流体力学模拟，以量化非电离远紫外（FUV）辐射在\textsc{Silcc 项目}模拟框架内的影响。 我们的研究纳入了电离辐射的传递以及来自星团的可变FUV辐射的自洽建模，超越了以往使用静态或简化的FUV场的研究。 这使得能够更准确地捕捉辐射与演化的星际介质之间以及其它恒星反馈通道之间的动态相互作用。 年轻星团附近的星际辐射场（ISRF）可以达到$G_0 \approx 10^4$（以Habing单位计），远远超过太阳邻域的值$G_0 = 1.7$。 尽管强度如此之高，但与电离辐射、恒星风和超新星相比，FUV辐射对整体恒星形成率的影响微乎其微。 恒星形成爆发性略有减少与可变FUV场增加的光电子（PE）加热效率有关。 靠近恒星形成区域的尘埃可以通过PE效应被加热到高达60K，具有较宽的温度分布。 可变FUV模型中的PE加热速率峰值更高但平均值较低，与静态ISRF模型相比。 在没有恒星风或电离辐射但有超新星的情况下，太阳邻域条件下的模拟产生了意外高的恒星形成率为$\sim 0.1 \mathrm{M_\odot~yr^{-1}~kpc^{-2}}$。 我们的分析显示，在恒星团外增加了冷中性介质（CNM）的体积填充因子（VFF），减少了热不稳定气体，并增强了温冷气体的分离。 可变FUV场还促进了含有分子成分的冷弥漫气体相，其体积填充因子为$\sim5-10$%。 显示英文摘要

摘要： We present magnetohydrodynamic simulations of star formation in the multiphase interstellar medium to quantify the impact of non-ionising far-ultraviolet (FUV) radiation within the \textsc{Silcc Project} simulation framework. Our study incorporates the radiative transfer of ionising radiation and self-consistent modelling of variable FUV radiation from star clusters, advancing beyond previous studies using static or simplified FUV fields. This enables a more accurate capture of the dynamic interaction between radiation and the evolving ISM alongside other stellar feedback channels. The interstellar radiation field (ISRF) near young star clusters can reach $G_0 \approx 10^4$ (in Habing units), far exceeding the solar neighbourhood value of $G_0 = 1.7$. Despite these high intensities, FUV radiation minimally impacts the integrated star formation rate compared to ionising radiation, stellar winds, and supernovae. A slight reduction in star formation burstiness is linked to increased photoelectric (PE) heating efficiency by the variable FUV field. photoelectric (PE) heating efficiency by the variable FUV field. Dust near star-forming regions can be heated up to 60 K via the PE effect, with a broad temperature distribution. PE heating rates in variable FUV models exhibit higher peaks but lower averages than static ISRF models. Simulations under solar neighbourhood conditions without stellar winds or ionising radiation but with supernovae yield unexpectedly high star formation rates of $\sim 0.1 \mathrm{M_\odot~yr^{-1}~kpc^{-2}}$. Our analysis reveals increased cold neutral medium (CNM) volume-filling factors (VFF) outside stellar clusters, reduced thermally unstable gas, and sharper warm-cold gas separation. The variable FUV field also promotes a cold diffuse gas phase with a molecular component, exhibiting a VFF of $\sim5-10$~per cent.