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نویسندگان
چکیده
The kinematic Sunyaev-Zel'dovich (kSZ) effect -- the Doppler boosting of cosmic microwave background (CMB) photons scattering off free electrons with non-zero line-of-sight velocity is an excellent probe distribution baryons in Universe. In this paper, we measure kSZ due to ionized gas traced by infrared-selected galaxies from \emph{unWISE} catalog. We employ "projected-field" estimator, which does not require spectroscopic galaxy redshifts. To suppress non-kSZ foreground signals associated (e.g., dust emission and thermal SZ), estimator requires cleaned CMB maps, obtain \emph{Planck} \emph{WMAP} data. Using a new "asymmetric" that combines different foreground-cleaned maps maximize signal-to-noise, kSZ$^2$-galaxy cross-power spectrum for three subsamples catalog, peak at mean redshifts $z \approx$ 0.6, 1.1, 1.5, have average halo mass $\sim 1$-$5\times 10^{13}$ $h^{-1} M_{\odot}$, total contain over 500 million galaxies. After marginalizing lensing contributions, amplitude signal $A_{\rm kSZ^2} = 0.42 \pm 0.31(stat.) 0.14(sys.)$, $5.02 1.01(stat.) 0.47(sys.)$, $8.23 3.23(stat.) 1.60(sys.)$, subsamples, where 1$ corresponds our fiducial model. combined detection S/N $>$ 5. discuss possible explanations excess \approx 1.1$ sample, show contamination very unlikely be cause. Our measurements illustrate clearly no are missing on large scales low
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ژورنال
عنوان ژورنال: Physical review
سال: 2021
ISSN: ['2470-0037', '2470-0010', '2470-0029']
DOI: https://doi.org/10.1103/physrevd.104.043518