KiDS-1000 cosmology: Combined second- and third-order shear statistics

Understand

This paper performs the first cosmological parameter analysis of the KiDS-1000 data with second- and third-order shear statistics.

• This work builds on a series of papers that describe the roadmap to third-order shear statistics.
• We derive and test a combined model of the second-order shear statistic, namely the COSEBIs and the third-order aperture mass statistics $\langle M_\mathrm{ap}^3\rangle$ in a tomographic set-up.
• We validate our pipeline with $N$-body simulations that mock the fourth Kilo Degree survey data release.