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• W1991385939 endingPage "030" @default.
• W1991385939 startingPage "030" @default.
• W1991385939 abstract "The nominal mission maps from the Planck satellite contain a wealth of information about secondary anisotropies in the cosmic microwave background (CMB), including those induced by the thermal Sunyaev-Zel'dovich (tSZ) effect and gravitational lensing. As both the tSZ and CMB lensing signals trace the large-scale matter density field, the anisotropies sourced by these processes are expected to be correlated. We report the first detection of this cross-correlation signal, which we measure at 6.2 sigma significance using the Planck data. We take advantage of Planck's multifrequency coverage to construct a tSZ map using internal linear combination techniques, which we subsequently cross-correlate with the publicly-released Planck CMB lensing potential map. [Abridged] We interpret the signal using halo model calculations, which indicate that the tSZ -- CMB lensing cross-correlation is a unique probe of the physics of intracluster gas in high-redshift, low-mass groups and clusters. Our results are consistent with extrapolations of existing gas physics models to this previously unexplored regime and show clear evidence for contributions from both the one- and two-halo terms, but no statistically significant evidence for contributions from diffuse, unbound gas outside of collapsed halos. We also show that the amplitude of the signal depends rather sensitively on the amplitude of fluctuations ($sigma_8$) and the matter density ($Omega_m$). We constrain the degenerate combination $sigma_8 (Omega_m/0.282)^{0.26} = 0.824 pm 0.029$, a result that is in less tension with primordial CMB constraints than some recent tSZ analyses. Our detection is a direct confirmation that hot, ionized gas traces the dark matter distribution over a wide range of scales in the universe ($sim 0.1$--$50 , {rm Mpc}/h$)." @default.
• W1991385939 created "2016-06-24" @default.
• W1991385939 creator A5085223087 @default.
• W1991385939 creator A5091900050 @default.
• W1991385939 date "2014-02-18" @default.
• W1991385939 modified "2023-10-16" @default.
• W1991385939 title "Detection of thermal SZ-CMB lensing cross-correlation in Planck nominal mission data" @default.
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• W1991385939 doi "https://doi.org/10.1088/1475-7516/2014/02/030" @default.
• W1991385939 hasPublicationYear "2014" @default.
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