AI 中文总结
研究穿越密度和温度不连续环境的星系受何影响，通过风洞模拟类似银河系质量星系，发现穿越时星系因更高密度损失更多气体，恒星形成率和颜色指数有微妙短暂变化，表明这种穿越对星系有可测但细微短暂的影响。
AI 中文摘要
星系团碰撞和合并是低红移宇宙中最具能量的现象之一。这些相互作用会扰乱星系团内介质，形成密度和温度不连续的区域。有证据表明这种环境会影响星系演化。本研究旨在了解穿越密度和温度不连续环境的星系会受到怎样的影响。为此，使用风洞装置进行了一组模拟，将一个类似银河系质量的星系插入其中。共创建了八个模型，包括两个控制运行和六个沿风洞具有不同密度和温度过渡的模型。结果表明，与恒定密度环境相比，星系穿越密度更高、不连续区域时，由于遇到更高密度会损失更多气体。星系进入风洞较密集部分时，恒星形成率会短暂增强，(u - i)颜色指数也会略有变化，最初会变蓝。但即使在最强烈过渡的模拟中，恒星形成率和颜色指数的变化也不大，与控制模型相比最多相差5%。模拟运行结束时，恒星形成率和颜色指数与控制运行相似。这些结果表明，穿越星系团内介质不连续会在星系中引发可测量的影响，但这些影响是微妙且短暂的。
英文摘要
Cluster collisions and mergers are among the most energetic phenomena in the low redshift Universe. These interactions disturb the intracluster medium creating regions with density and temperature discontinuities, such as sloshing spirals. There is evidence that such environments can influence galaxy evolution. This study aims to understand how a galaxy that crosses an environment with discontinuities in density and temperature can be affected. To this end, a set of simulations was conducted using a wind tunnel setup into which a {MW-like mass} galaxy was inserted. A total of eight models were created, namely two control runs and six with distinct density and temperature transitions along the tunnel, comprising simulations with low density and high density environments. Results show that galaxies lose {considerably} more gas due to the higher density encountered when crossing denser and discontinuous regions in comparison to a constant density environment. The star formation rate exhibits a brief enhancement when the galaxy enters the denser section of the tunnel and {(u-i)} color index also undergoes slight changes, initially becoming bluer. However, even in the simulations with the most intense transitions, changes {in star formation rate and color index} are not substantial, reaching at most 5\% difference in relation to the control models. By the end of the simulation runs, star formation rate and color index are similar to the control runs. These results suggest that crossing intracluster medium discontinuities can induce measurable effects in a galaxy, but these are subtle and short-lived.
Comments15 pages, 10 figures. Accepted for publication in ApJ
