Yan Gong

Cross-correlating Squared kSZ and HI Intensity Fields: A Map-level ACT--MeerKAT Forecast

Yu-Er Jiang, Yun Liu, Yan Gong +5

The kinetic Sunyaev--Zel'dovich (kSZ) effect probes the line-of-sight momentum of free electrons, but its blackbody spectrum and velocity-dependent sign make it difficult to isolat…

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 (…

Constraining Lyman-Werner Feedback from Velocity Acoustic Oscillations in the Cosmic Dawn 21 cm Signal

Xi Du, Bin Yue, Furen Deng +4

During Cosmic Dawn, Pop III stars could be formed in minihalos through molecular hydrogen (H $_{2}$ ) cooling. The minimum halo mass required for H $_{2}$ cooling is highly sensitive to L…

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…

Supernova Classification using the Recurrent Neural Network in the CSST Ultra-Deep Field Survey

Minglin Wang, Yan Gong, Dejia Zhou +1

We study supernova (SN) classification using the Recurrent Neural Networks (RNNs) within the Chinese Space-station Survey Telescope Ultra-Deep Field (CSST-UDF) photometric survey a…

Constraining and Comparing the Dynamical Dark Energy and f(R) Modified Gravity Models with Cosmological Distance Measurements

Shuai Feng, Yan Gong, Xiaohui Liu +2

We constrain and compare the $w_{0} w_{a}$ CDM dynamical dark energy model and three $f (R)$ modified gravity models using the current cosmological distance measurements, including 11…

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…

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…

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…

astro-ph.IM2024★ 19 cited

Forecasting Constraint on the $f (R)$ Theory with the CSST SN Ia and BAO Surveys

Jun-Hui Yan, Yan Gong, Minglin Wang +2

The $f (R)$ modified gravity theory can explain the accelerating expansion of the late Universe without introducing dark energy. In this study, we predict the constraint strength on…

Large-scale Array for Radio Astronomy on the Farside

Xuelei Chen, Feng Gao, Fengquan Wu +20

At the Royal Society meeting in 2023, we have mainly presented our lunar orbit array concept called DSL, and also briefly introduced a concept of a lunar surface array, LARAF. As t…

Velocity acoustic oscillations on Cosmic Dawn 21 cm power spectrum as a probe of small-scale density fluctuations

Xin Zhang, Hengjie Lin, Meng Zhang +4

We investigate the feasibility of using the velocity acoustic oscillations (VAO) features on the Cosmic Dawn 21 cm power spectrum to probe small-scale density fluctuations. In the…

Cosmological Forecast of the Void Size Function Measurement from the CSST Spectroscopic Survey

Yingxiao Song, Qi Xiong, Yan Gong +11

Void size function (VSF) contains information of the cosmic large-scale structure (LSS), and can be used to derive the properties of dark energy and dark matter. We predict the VSF…