The dark matter halo sparsity, i.e. the ratio between spherical halo masses enclosing two different overdensities, provides a non-parametric proxy of the halo mass distribution which has been shown to be a sensitive probe of the cosmological imprint encoded in the mass profile of haloes hosting galaxy clusters. Mass estimations at several overdensities would allow for multiple sparsity...
Euclid will provide imaging and spectroscopy over the same sky area. This provides examples of the joint use of surveys with the 3*2 pt and with the combination of the 3*2 pt with the spectocopic sample.
The Kilo-Degree survey measures cosmic shear, and has been combined with galaxy clustering information. I will review our results and prospects, with particular attention to the probe combination and sky footprint aspects.
I will start reviewing CMB lensing signal extraction techniques and the most recent lensing maps and cosmological results from Planck and ACT. I will then discuss prospects for CMB lensing measurements in the future (Simons Observatory, CMB-S4)
Advances in experimental techniques make it possible to map the high redshift Universe in three dimensions at high fidelity in the near future. This will increase the observed volume by many-fold, while providing unprecedented access to very large scales, which hold key information about early-Universe physics. In addition, such measurements can directly probe the Dark Energy density...
GAUSS is a projet that has been submitted to Voyage 2050 as a space mission to improve constraints on dark energy by one order of magnitude.
