10-1093-mnras-stw1455.pdf (4.49 MB)
Detection of the kinematic Sunyaev-Zel'dovich effect with DES Year 1 and SPT
journal contribution
posted on 2023-06-09, 03:12 authored by Kathy RomerKathy Romer, et al. The DES and SPT CollaborationsWe detect the kinematic Sunyaev-Zel'dovich (kSZ) effect with a statistical significance of 4.2sigma 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, bar{tau}_e = (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 bar{tau}_e, 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.
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STFC
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- Published
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- Published version
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Monthly Notices Of The Royal Astronomical SocietyISSN
0035-8711Publisher
Oxford University PressExternal DOI
Volume
461Page range
3172-3193Department affiliated with
- Physics and Astronomy Publications
Research groups affiliated with
- Astronomy Centre Publications
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- Yes
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- Yes
Legacy Posted Date
2016-09-30First Open Access (FOA) Date
2016-09-30First Compliant Deposit (FCD) Date
2016-09-30Usage metrics
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