Qi Xiong

Emulating the nonlinear effects of modified gravity on the matter power spectrum for reconstruction

Lanyang Yi, Kazuya Koyama, Qi Xiong +1

Including nonlinear information from modified gravity (MG) brings more constraining power to the model-independent reconstruction of MG functions. However, the calculation of the n…

Exploring Primordial Non-Gaussianity Measurements in the CSST Spectroscopic Survey

Jiangnan Duan, Yan Gong, Qi Xiong +5

Primordial non-Gaussianity (PNG) is a fundamental probe of the physics of the early Universe and inflation. Here we present a comprehensive study of the constraints on the local-ty…

Probing Baryonic Feedback Effect with CSST Weak Lensing and Future FRB Measurements

Shuai Feng, Yan Gong, Qi Xiong +4

We explore the joint probe on the baryonic feedback effect using the weak lensing measurement from the upcoming Chinese Space-station Survey Telescope (CSST) photometric survey and…

astro-ph.GA2026

Cross-Comparison of Galaxies Detected in the CSST Spectroscopic Survey and the SKA HI Survey

Yingfeng Liu, Furen Deng, Wenxiang Pei +8

We present a forward-modeling framework to forecast the galaxies detected in the Chinese Space Station Survey Telescope (CSST) spectroscopic survey and the Square Kilometre Array (…

The Hydrostatic Mass Bias and the $σ_{8}$ Tension: A Multi-Probe Forecast for Stage-IV/V Surveys

Ayodeji Ibitoye, Prabhakar Tiwari, Qi Xiong +1

The hydrostatic mass bias ( $b_{HSE}$ ) is a leading systematic uncertainty in cluster cosmology and a principal source of degeneracy with $σ_{8}$ and $Ω_{m}$ . We investigate th…

astro-ph.CO2025★ 1 cited

Forecasting the Constraint on the Hu-Sawicki $f (R)$ Modified Gravity in the CSST $3 \times 2$ pt Photometric Survey

Jun-Hui Yan, Yan Gong, Qi Xiong +5

We forecast the constraint on the Hu-Sawicki $f (R)$ model from the photometric survey operated by the Chinese Space Station Survey Telescope (CSST). The simulated $3 \times 2$ pt data…

Forecasting Constraint on Primordial Black Hole Properties with the CSST $3 \times 2$ pt Analysis

Dingao Hu, Yan Gong, Pengfei Su +4

This study forecasts the constraints on the properties of primordial black holes (PBHs) as a cold dark matter component using the galaxy clustering, weak lensing, and galaxy-galaxy…

Exploring Cosmological Constraints of the Void-Lensing Cross-Correlation in the CSST Photometric Survey

Qi Xiong, Yan Gong, Junhui Yan +8

We investigate the cosmological constraints from the void-lensing cross-correlation assuming the $w$ CDM model for the Chinese Space Station Survey Telescope (CSST) photometric surv…

Exploring Joint Observation of the CSST Shear and clustering of astrophysical gravitational wave source measurements

Pengfei Su, Yan Gong, Qi Xiong +4

We present a comprehensive forecast for cosmological constraints using the joint observation of the cosmic shear signal from the Chinese Space Station Survey Telescope (CSST) and t…

astro-ph.CO2025★ 15 cited

Cosmological Prediction from the joint observation of MeerKAT and CSST at $z$ = 0.4 $\sim$ 1.2

Yu-Er Jiang, Yan Gong, Qi Xiong +10

Cross-correlating neutral hydrogen (HI) 21cm intensity mapping with galaxy surveys provides an effective probe of astrophysical and cosmological information. This work presents a c…

astro-ph.IM2025★ 3 cited

GalaxyGenius: Mock galaxy image generator for various telescopes from hydrodynamical simulations

Xingchen Zhou, Hang Yang, Nan Li +11

We introduce GalaxyGenius, a Python package designed to produce synthetic galaxy images tailored to different telescopes based on hydrodynamical simulations. Its implementation wil…

Future Cosmology: New Physics and Opportunity from the China Space Station Telescope (CSST)

Yan Gong, Haitao Miao, Xingchen Zhou +12

The China Space Station Telescope (CSST) is the next-generation Stage~IV survey telescope. It can simultaneously perform multi-band imaging and slitless spectroscopic wide- and dee…

Exploring cosmological constraints of the weak gravitational lensing and galaxy clustering joint analysis in the CSST photometric survey

Qi Xiong, Yan Gong, Xingchen Zhou +10

We explore the joint weak lensing and galaxy clustering analysis from the photometric survey operated by the China Space Station Telescope (CSST), and study the strength of the cos…

2D watershed void clustering for probing the cosmic large-scale structure

Yingxiao Song, Yan Gong, Qi Xiong +5

Cosmic void has been proven to be an effective cosmological probe of the large-scale structure (LSS). However, since voids are usually identified in spectroscopic galaxy surveys, t…

Void Number Counts as a Cosmological Probe for the Large-Scale Structure

Yingxiao Song, Qi Xiong, Yan Gong +6

Void number counts (VNC) indicates the number of low-density regions in the large-scale structure (LSS) of the Universe, and we propose to use it as an effective cosmological probe…

Cosmological Prediction of the Void and Galaxy Clustering Measurements in the CSST Spectroscopic Survey

Yingxiao Song, Qi Xiong, Yan Gong +10

The void power spectrum is related to the clustering of low-density regions in the large-scale structure (LSS) of the Universe, and can be used as an effective cosmological probe t…