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Can empty cosmic voids reveal universe's hidden structure?
Yingxiao Song, Xiaohu Yang, Yan Gong, Yizhou Gu, Qingyang Li, Hong Guo, Yunkun Han, Yipeng Jing, Cheng Li, Feng Shi, Jipeng Sui, Run Wen, Hu Zhan, Pengjie Zhang, Youcai Zhang, Gong-Bo Zhao, Xian Zhong Zheng, Xingchen Zhou, Hu Zou
June 1, 2026
The team proposes using voids identified in galaxy group catalogs—rather than individual galaxies—to probe the universe's large-scale structure. Using mock CSST data, they show that void statistics measured from galaxy groups faithfully match those from dark matter halos, even when only 30% of galaxies have precise redshift measurements. This approach simplifies theory and offers a practical tool for upcoming surveys.
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