Title: Galaxy Transformation Across the Cosmic Web: Evolution of Stellar Colours and Star Formation Rates in Filaments Show Chinese title

Title: 星系在宇宙网中的转变：纤维状结构中恒星颜色和恒星形成率的演化

Abstract: Galaxies form and evolve within the diverse environments of the cosmic web. However, disentangling the effects of internal properties, local environments, and large-scale structures (LSS) on galaxy evolution involvessignificant complexities, since these effects are frequently overlapping. The aim of this work is to provide evidence of the imprints left by LSS on galaxy properties by selecting samples of galaxies from different environments, while matching their intrinsic characteristics. We investigate the effects of the LSS on the g-r colour and star formation rate (SFR) in galaxies with stellar mass M $> 10^{10}$ M$_\odot$, with the redshift $0.05 \le z \le 0.1$, and selected from the SDSS DR16. We use a catalogue of the LSS available in the literature to define samples of galaxies located in field and filament environments. Galaxies located in the field tend to exhibit bluer g-r stellar colours and higher SFR than those in filaments. These differences persist even in samples of galaxies matched by mass and galaxy local overdensity, indicating that they are not produced by internal processes. These differences cannot be attributed to variations in morphology. There is also a variation in stellar colour and SFR with distance to the filaments (Df). The SFR of galaxies becomes statistically smaller than that of field galaxies for objects located at Df<5 Mpc, while changes in stellar colour occur at smaller distances (Df<1 Mpc). This could indicates that the typical filament width is about 2.5-5 Mpc. The variations in colour and SFR between galaxy samples in the field and in filaments, with matched masses and local overdensities, indicate that large-scale environmental factors drive these transformations rather than local or internal galaxy properties. These transformations are not strong enough to produce changes in galaxy morphology. They could be explained by cosmic web starvation. Show Chinese abstract

Abstract: 星系形成和演化于宇宙网的多样化环境中。然而，解开星系演化过程中内部属性、局域环境和大尺度结构（LSS）的影响涉及显著的复杂性，因为这些影响经常重叠。本研究的目标是通过从不同环境中选择星系样本，同时匹配它们的固有特性，来提供由LSS在星系属性上留下的印记的证据。我们研究了大尺度结构对恒星质量为 M $> 10^{10}$ M$_\odot$、红移为$0.05 \le z \le 0.1$且选自SDSS DR16的星系的g-r颜色和恒星形成率（SFR）的影响。我们使用文献中的LSS目录来定义位于场和纤维状环境中的星系样本。位于场中的星系往往比纤维中的星系展现出更蓝的g-r恒星颜色和更高的SFR。即使在按质量和星系局域过密性匹配的样本中，这些差异仍然存在，表明它们不是由内部过程产生的。这些差异不能归因于形态的变化。与纤维的距离（Df）也会影响恒星颜色和SFR。对于距离纤维小于5 Mpc的星系，其SFR在统计上比场星系的小，而恒星颜色的变化则发生在更小的距离（Df<1 Mpc）。这可能表明典型纤维的宽度约为2.5-5 Mpc。在匹配质量和局域过密性的场和纤维星系样本之间，颜色和SFR的变化表明，大尺度环境因素驱动这些转变，而不是局部或星系内部属性。这些转变不足以引起星系形态的变化。它们可以通过宇宙网饥饿效应来解释。