Weak Gravitational Lensing
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Weak gravitational lensing is a powerful tool to measure the mass distribution of the Universe. By analyzing the subtle distortions in the shapes of background galaxies caused by foreground mass (like galaxy clusters or dark matter halos), we can directly “weigh” the invisible dark matter.
My research applies weak lensing techniques to various astronomical objects, including galaxy groups, clusters, and the host halos of Active Galactic Nuclei. I use shape catalogs from state-of-the-art surveys to calibrate mass scaling relations and uncover the properties of dark matter structures.
Relevant Publications
- Black Hole-Halo Mass Relation from UNIONS Weak Lensing - Qinxun Li et al. (2024)
- CFHT MegaCam Two Deep Fields Imaging Survey (2DFIS) I: Overview - Binyang Liu et al. (2026)
- UNIONS: The Ultraviolet Near-infrared Optical Northern Survey - Stephen Gwyn et al. (2025)
- The density profile of Milky Way dark matter halo constrained from the OGLE microlensing sky map - S. Lin et al. (2025)
- Testing Cotton gravity as dark matter substitute with weak lensing - Geyu Mo et al. (2025)
- Dark Matter Halos of Luminous Active Galactic Nuclei from Galaxy-Galaxy Lensing with the HSC Subaru Strategic Program - Wentao Luo et al. (2024)
- Point spread function errors for weak lensing - density cross-correlations: Application to UNIONS - Ziwen Zhang et al. (2024)
- Static Microlensing: Concept, Method and Candidates - Qi Guo et al. (2024)
- Halo Mass-observable Proxy Scaling Relations and Their Dependencies on Galaxy and Group Properties - Ziwen Zhang et al. (2024)