Journal
PHYSICAL REVIEW D
Volume 94, Issue 4, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevD.94.043522
Keywords
-
Funding
- Beecroft Trust
- ERC [259505, 267117]
- STFC
- Higgs Centre in Edinburgh
- NASA
- STFC [ST/K00106X/1, ST/N000919/1] Funding Source: UKRI
- Science and Technology Facilities Council [ST/K00106X/1] Funding Source: researchfish
Ask authors/readers for more resources
Future ground-based cosmic microwave background (CMB) experiments will generate competitive large-scale structure data sets by precisely characterizing CMB secondary anisotropies over a large fraction of the sky. We describe a method for constraining the growth rate of structure to sub-1% precision out to z approximate to 1, using a combination of galaxy cluster peculiar velocities measured using the kinetic Sunyaev-Zel'dovich (kSZ) effect, and the velocity field reconstructed from galaxy redshift surveys. We consider only thermal SZ-selected cluster samples, which will consist of O(10(4)-10(5)) sources for Stage 3 and 4 CMB experiments respectively. Three different methods for separating the kSZ effect from the primary CMB are compared, including a novel blind constrained realization method that improves signal-to-noise by a factor of similar to 2 over a commonly-used aperture photometry technique. Assuming a correlation between the integrated tSZ y-parameter and the cluster optical depth, it should then be possible to break the kSZ velocity-optical depth degeneracy. The effects of including CMB polarization and SZ profile uncertainties are also considered. In the absence of systematics, a combination of future Stage 4 experiments should be able to measure the product of the growth and expansion rates, alpha equivalent to fH, to better than 1% in bins of Delta z = 0.1 out to z approximate to 1-competitive with contemporary redshift-space distortion constraints from galaxy surveys. We conclude with a discussion of the likely impact of various systematics.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available