The conformity effect, indicating the evolution of galaxies is related to its surrounding neighbor galaxies as far as a few Mpc, is an interesting phenomenon in the modeling of galaxy and evolution. Here we study the conformity effect of HI galaxies in a matched galaxy sample between SDSS DR7 and ALFALFA surveys. By checking the probability difference for the detected H i galaxies as a function of distance around a normal or an H i galaxy, we find that this effect is significant out to 5 Mpc. It also shows a dependence on the stellar mass of galaxies, with the strength the strongest in the stellar mass range of 10¹⁰ < M _*/M_⊙ < 10^10.5. However, when the sample is confined to central galaxies in groups with virial radii smaller than 1 Mpc, the 1-halo conformity signal is still evident, while the 2-halo conformity signal is reduced to a very weak amplitude. Our results confirm the previous study in the optical band that the 2-halo term is possibly caused by the bias effect in the sample selection. Furthermore, we confirm the existence of the 1-halo conformity discovered in the optical and radio band in previous investigations. Our results provide another viewpoint on the conformity effect and hope to shed light on the co-evolution of the galaxies and their neighbors in the current galaxy formation models.

整合效应，表明星系的演化与其周围的邻近星系有关，远至几 Mpc，是星系和演化建模中的一个有趣现象。在这里，我们研究了 HI 星系在 SDSS DR7 和 ALFALFA 调查之间的匹配星系样本中的整合效应。通过检查检测到的 H i星系的概率差异作为正常或 H i星系周围距离的函数，我们发现这种效应在 5 Mpc 范围内是显着的。它还表现出对星系恒星质量的依赖性，在 10 ¹⁰ < M _* /M _⊙ < 10 ^{10.5的恒星质量范围内强度最强}. 然而，当样本被限制在维里半径小于 1 Mpc 的星系群中时，1-halo 一致性信号仍然很明显，而 2-halo 一致性信号则降低到非常弱的幅度。我们的结果证实了先前在光学波段的研究，即 2-晕项可能是由样本选择中的偏差效应引起的。此外，我们证实了在先前的研究中在光学和无线电波段中发现的 1-halo 一致性的存在。我们的结果为整合效应提供了另一种观点，并希望阐明当前星系形成模型中星系及其邻居的共同演化。