Detection of the kinematic Sunyaev–Zel'dovich effect with DES Year 1 and SPT
Name
1603.03904.pdf
Description
Accepted version
Size
2.8 MB
Format
Unknown
Checksum (MD5)
48415284a374492da4d91e21b624c453
Author(s)
McDonald, M.
Date Issued
2016
Journal
Monthly Notices of the Royal Astronomical Society
Publisher
Oxford University Press (OUP)
Citation
Soergel, B., et al. "Detection of the Kinematic Sunyaev-Zel'dovich Effect with Des Year 1 and Spt." Monthly Notices of the Royal Astronomical Society 461 3 (2016): 3172-93.
Version
Author's final manuscript
Abstract
© 2016 The Authors. We detect the kinematic Sunyaev-Zel'dovich (kSZ) effect with a statistical significance of 4.2θ by combining a cluster catalogue derived from the first year data of the Dark Energy Survey with cosmic microwave background temperature maps from the South Pole Telescope Sunyaev-Zel'dovich Survey. This measurement is performed with a differential statistic that isolates the pairwise kSZ signal, providing the first detection of the large-scale, pairwise motion of clusters using redshifts derived from photometric data. By fitting the pairwise kSZ signal to a theoretical template, we measure the average central optical depth of the cluster sample, te = (3.75 ± 0.89) × 10-3. We compare the extracted signal to realistic simulations and find good agreement with respect to the signal to noise, the constraint on te, and the corresponding gas fraction. High-precision measurements of the pairwise kSZ signal with future data will be able to place constraints on the baryonic physics of galaxy clusters, and could be used to probe gravity on scales ≥100 Mpc.
MIT Department
MIT Kavli Institute for Astrophysics and Space Research
Terms of Use
Creative Commons Attribution-Noncommercial-Share Alike
Persistent DSpace Link
DOI of Published Version
https://doi.org/10.1093/MNRAS/STW1455
