AI 中文总结
本研究利用WISE x PS1星表，通过KS检验统计分析CHIME星表1中19个重复FRB与253个非重复FRB的环境，发现二者环境无显著差异，且FRB或偏好低密度星系环境，凸显大样本FRB研究的必要性。
AI 中文摘要
快速射电暴（FRBs）是明亮的毫秒级射电瞬变，其起源尚不清楚，分为重复暴和非重复暴，可能对应不同的前身星类型，但因已定位的FRBs数量有限，难以验证该区分。大尺度星系环境可揭示FRBs寄主星系及其前身星的性质：高of数密度区域通常与年老星系相关，低数密度区域则与年轻恒星形成星系或质量较小的宁静星系相关。本研究利用WISE x PS1星表中的星系，对CHIME星表1中的19个重复暴和253个非重复暴的环境进行统计评估，采用柯尔莫哥洛夫-斯米尔诺夫（KS）检验，结果显示两类FRBs的环境无显著差异（KS检验p值为0.673），表明差异的统计显著性可能依赖小样本统计，凸显未来FRB样本的必要性。有趣的是，FRBs与随机星系场的对比显示，FRBs可能更倾向于发生在星系低密度环境中，与随机星系孔径相比，其中位数KS检验p值为2.84×10^-2。
英文摘要
Fast radio bursts (FRBs) are bright, millisecond-duration radio transients of unknown origin. They are categorized as repeaters and non-repeaters, possibly indicating distinct progenitor types. However, validating this distinction is difficult because of the limited number of localized FRBs. Large-scale galactic environments can provide insight into the nature of the host galaxies of FRBs and their progenitors. High-number-density regions are typically associated with old galaxies, whereas low-number-density regions are linked to young star-forming or less massive quiescent galaxies. In this study, we use galaxy number density to statistically assess the environments of 19 repeaters and 253 non-repeaters from CHIME Catalog 1, using galaxies from the WISE x PS1 catalog. A Kolmogorov-Smirnov (KS) test showed no significant difference between the two populations ($p_{\rm KS} = 0.673$). This result indicates that the statistical significance of the difference could depend on small-number statistics, highlighting the necessity of future FRB samples. Intriguingly, a comparison of FRBs with random galaxy fields suggests that FRBs may preferentially occur in underdense galactic environments, with a median $p$-value ($p_{\rm KS}$) of $2.84 \times 10^{-2}$ compared to random galaxy apertures.
Comments12 pages, 5 figures, accepted for publication in Publications of the Astronomical Society of the Pacific (PASP) on 28 July 2026
