Kavli Affiliate: Chao-Lin Kuo
| First 5 Authors: E. Schiappucci, F. Bianchini, M. Aguena, M. Archipley, L. Balkenhol
| Summary:
We infer the mean optical depth of a sample of optically-selected galaxy
clusters from the Dark Energy Survey (DES) via the pairwise kinematic
Sunyaev-Zel’dovich (kSZ) effect. The pairwise kSZ signal between pairs of
clusters drawn from the DES Year-3 cluster catalog is detected at $4.1 sigma$
in cosmic microwave background (CMB) temperature maps from two years of
observations with the SPT-3G camera on the South Pole Telescope. After cuts,
there are 24,580 clusters in the $sim 1,400$ deg$^2$ of the southern sky
observed by both experiments. We infer the mean optical depth of the cluster
sample with two techniques. The optical depth inferred from the pairwise kSZ
signal is $bar{tau}_e = (2.97 pm 0.73) times 10^{-3}$, while that inferred
from the thermal SZ signal is $bar{tau}_e = (2.51 pm 0.55) times 10^{-3}$.
The two measures agree at $0.6 sigma$. We perform a suite of systematic checks
to test the robustness of the analysis.
| Search Query: ArXiv Query: search_query=au:”C. L. Kuo”&id_list=&start=0&max_results=10