Weak Gravitational Lensing: Recent Progress and Future Goals

Dear Colleagues,

Arising from the deflection of light by the gravitational potential of large-scale structures (LSSs) in the universe, weak gravitational lensing has been identified as one of the most promising cosmological probes, especially for understanding the nature of dark matter, dark energy, and the law of gravity. Because weak lensing can only lead to tiny distortions on the shapes, sizes and fluxes of background objects, it is extremely challenging to extract weak lensing signals from observations.

Since the first detections of cosmic shear from LSSs around the beginning of this century, weak lensing studies have rapidly developed and become an important field of research in modern cosmology. Over the past few decades, Stage III surveys, including the Dark Energy Survey (DES), the Kilo Degree Survey (KiDS), and the Hyper Suprime Cam survey (HSC), are attaining their final release of data. Meanwhile, Stage IV surveys will be carried out within the next decade, including the Legacy Survey of Space and Time (LSST), the Euclid mission, the Roman mission, and the Chinese Space Station Telescope (CSST).

This Special Issue will focus on the recent progress and future goals of current and next-generation weak lensing surveys, aimed at presenting essential improvements addressing open questions in the area of weak lensing research. Contributions on various topics are welcome, including developing new weak lensing shear measurement methods, understanding the measurement and astrophysical systematics, and extracting cosmological information with different statistical tools.

Prof. Dr. Huanyuan Shan
Guest Editor

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• weak gravitational lensing
• cosmic shear
• galaxy-galaxy lensing
• magnification
• shear measurement
• redshift calibration
• intrinsic alignment
• baryonic feedback