标题： MIGHTEE-HI：通过HI选择的星系的恒星形成特性 显示英文标题

标题： MIGHTEE-HI: The star-forming properties of HI selected galaxies

摘要： 原子气体、星系的恒星形成历史及其环境之间存在内在联系，我们需要厘清这些依赖关系，以理解它们在星系形成和演化中的作用。 本文中，我们分析了来自MIGHTEE-HI巡天早期科学发布数据的187个星系的恒星形成历史（SFH），重点关注了HI属性与恒星形成之间的关系。无论推断出的SFH如何，星系的HI到恒星质量比与形成时间之间存在强相关性，而恒星质量和形成时间之间存在反向相关性。 此外，具有较低恒星质量和较高HI到恒星质量比的星系表现出比更高质量星系更长的气体耗尽时间，这表明它们似乎更有效地耗尽了气体并形成了恒星。这表明较小且富含气体的星系由于较浅的势阱和效率较低的恒星形成过程，具有更高的耗尽时间。 此外，我们还探讨了自旋纤维排列与HI含量之间的联系。我们发现峰值恒星形成活动与接近纤维的距离之间没有显著的相关性。然而，我们确实发现，在我们的样本中距离纤维1 Mpc内的两个星系具有非常低的气体耗尽时间尺度，并且它们的自旋轴与纤维的方向不一致，这暗示了星系属性与接近纤维之间的某种联系。 显示英文摘要

摘要： The interplay between atomic gas, the star-formation history of a galaxy and its environment are intrinsically linked, and we need to decouple these dependencies to understand their role in galaxy formation and evolution. In this paper, we analyse the star formation histories (SFHs) of 187 galaxies from the MIGHTEE-HI Survey Early Science Release data, focusing on the relationships between HI properties and star formation. A strong correlation emerges between a galaxy's HI-to-stellar mass ratio and the time of formation, alongside an inverse correlation between stellar mass and time of formation, regardless of the inferred SFH. Additionally, galaxies with lower stellar masses and higher HI-to-stellar mass ratios exhibit longer gas depletion times compared to more massive galaxies, which appear to have depleted their gas and formed stars more efficiently. This suggests that smaller, gas-rich galaxies have higher depletion times due to shallower potential wells and less efficient star formation. Furthermore, we explore the connection between spin-filament alignment and HI content. We find no significant correlation between peak star formation activity and proximity to filaments. However, we do find that the two galaxies in our sample within 1 Mpc of a filament have very low gas-depletion timescales and have their spin axis misaligned with the filament, suggestive of a link between the galaxy properties and proximity to a filament.