论文标题
在模拟中大规模细丝的星系研究
Study of galaxies on large-scale filaments in simulations
论文作者
论文摘要
我们使用星系在其环境（EAGLE）宇宙学模拟中的进化和组装中的数据来研究宇宙网络中星系的特性。星系变得更红，并以较低的速率形成恒星。这些趋势对于具有$ M _*/M _ {\ odot} \ Lessim10^{10} $的星系尤其强。我们还发现，在距离细丝的脊柱的距离$ <0.5 $ mpc上，细丝星系中的气体和恒星质量分数急剧上升，距离细丝的脊柱距离有所下降。这些结果，加上SFR/$ M _*$的匹配趋势以及$ G-R $颜色的细丝星系颜色表明（i）室内气体凝结到灯丝星系中，从而为它们的恒星形成增添了恒星的形成，并且（ii）星系的数量增加了，增加了与灯丝相互作用的近距离速度相互交流的速度速率。
We use data from the Evolution and Assembly of GaLaxies in their Environment (EAGLE) cosmological simulation to study properties of galaxies in the cosmic web. Galaxies become more redder and form stars at a lower rate relative to their counterparts further away from the cylindrical axis of the large-scale filaments. These trends are particularly strong for galaxies with $M_*/M_{\odot}\lesssim10^{10}$. We also find that at distances $<0.5$ Mpc from the spine of the filaments, the median gas and stellar mass fraction in filament galaxies rises sharply with decreasing distance from the spine of the filament. These results, together with matching trends in the SFR/$M_*$ and the $g-r$ colour of filament galaxies suggest that (i) the intrafilamentary gas condenses into the filament galaxies thus fuelling star formation in them, and (ii) increased number density of galaxies closer to the central axis of the filament enhances the rate of gravitational interactions among filament galaxies closer to the spine.
