AI 中文总结
该研究利用TNG300和TNG-Cluster模拟，基于相空间确定星系团星系下落时间估计值，与文献一致且可用于观测。其分析管道、数据产品及教程已发布，将助力相关研究并提供基线。
AI 中文摘要
利用TNG300和TNG-Cluster模拟，针对$z \leqslant 1$的所有模拟快照，确定了质量$M_{\mathrm{h}} \geqslant 10^{14}~M_{\odot}$的星系团中星系进入星系团的基于相空间的下落时间估计值。这些估计值与文献中先前的工作一致，并且仅基于星系在投影相空间中的位置，就可以很容易地应用于星系团星系的观测中，而其他估计方法不可行。用于产生这些下落时间估计值的分析管道、所得数据产品以及概述其使用方法的教程均已公开发布。预计数据产品和提供的教程将促进该领域未来需要下落时间估计的研究，并为研究星系团等密集环境中星系的轨道历史提供额外的基线。
英文摘要
Using the TNG300 and TNG-Cluster simulations, phase space-based estimates for galaxy infall time onto clusters with $M_{\mathrm{h}} \geqslant 10^{14}~M_{\odot}$ are determined for all simulation snapshots with $z \leqslant 1$. These infall time estimates are consistent with previous work in the literature, and can be readily applied to observations of cluster galaxies, where no other estimate is feasible, based only on the galaxy's position in projected phase space. The analysis pipeline used to produce these infall time estimates is publicly released, as are the resulting data products, as well as a tutorial that outlines their use. It is anticipated that both the data products and the provided tutorial will facilitate future research within the community which require infall time estimates, and will provide an additional baseline for studies investigating the orbital histories of galaxies in dense environments like galaxy clusters.
Comments5 pages, 2 figures. Submitted to OJAp
