TY - JOUR
T1 - Cross-correlating Planck tSZ with RCSLenS weak lensing: implications for cosmology and AGN feedback
AU - Hojjati, Alireza
AU - Tröster, Tilman
AU - Harnois-Déraps, Joachim
AU - McCarthy, Ian G.
AU - van Waerbeke, Ludovic
AU - Choi, Ami
AU - Erben, Thomas
AU - Heymans, Catherine
AU - Hildebrandt, Hendrik
AU - Hinshaw, Gary
AU - Ma, Yin-Zhe
AU - Miller, Lance
AU - Viola, Massimo
AU - Tanimura, Hideki
N1 - Near final version deposited in arXiv 26/08/16 before e-Pub date 06/07/17.
PY - 2017/10/1
Y1 - 2017/10/1
N2 - We present measurements of the spatial mapping between (hot) baryons and
the total matter in the Universe, via the cross-correlation between the
thermal Sunyaev-Zeldovich (tSZ) map from Planck and the weak
gravitational lensing maps from the Red Cluster Sequence Lensing Survey
(RCSLenS). The cross-correlations are performed on the map level where
all the sources (including diffuse intergalactic gas) contribute to the
signal. We consider two configuration-space correlation function
estimators, ξy-κ and ξ ^ {y-γ
t}, and a Fourier-space estimator, C_{ℓ}^{y-κ}, in
our analysis. We detect a significant correlation out to 3° of
angular separation on the sky. Based on statistical noise only, we can
report 13σ and 17σ detections of the cross-correlation using
the configuration-space y-κ and y-γt estimators,
respectively. Including a heuristic estimate of the sampling variance
yields a detection significance of 7σ and 8σ, respectively.
A similar level of detection is obtained from the Fourier-space
estimator, C_{ℓ}^{y-κ}. As each estimator probes different
dynamical ranges, their combination improves the significance of the
detection. We compare our measurements with predictions from the
cosmo-OverWhelmingly Large Simulations suite of cosmological
hydrodynamical simulations, where different galactic feedback models are
implemented. We find that a model with considerable active galactic
nuclei (AGN) feedback that removes large quantities of hot gas from
galaxy groups and Wilkinson Microwave Anisotropy Probe 7-yr best-fitting
cosmological parameters provides the best match to the measurements. All
baryonic models in the context of a Planck cosmology overpredict the
observed signal. Similar cosmological conclusions are drawn when we
employ a halo model with the observed 'universal' pressure profile.
AB - We present measurements of the spatial mapping between (hot) baryons and
the total matter in the Universe, via the cross-correlation between the
thermal Sunyaev-Zeldovich (tSZ) map from Planck and the weak
gravitational lensing maps from the Red Cluster Sequence Lensing Survey
(RCSLenS). The cross-correlations are performed on the map level where
all the sources (including diffuse intergalactic gas) contribute to the
signal. We consider two configuration-space correlation function
estimators, ξy-κ and ξ ^ {y-γ
t}, and a Fourier-space estimator, C_{ℓ}^{y-κ}, in
our analysis. We detect a significant correlation out to 3° of
angular separation on the sky. Based on statistical noise only, we can
report 13σ and 17σ detections of the cross-correlation using
the configuration-space y-κ and y-γt estimators,
respectively. Including a heuristic estimate of the sampling variance
yields a detection significance of 7σ and 8σ, respectively.
A similar level of detection is obtained from the Fourier-space
estimator, C_{ℓ}^{y-κ}. As each estimator probes different
dynamical ranges, their combination improves the significance of the
detection. We compare our measurements with predictions from the
cosmo-OverWhelmingly Large Simulations suite of cosmological
hydrodynamical simulations, where different galactic feedback models are
implemented. We find that a model with considerable active galactic
nuclei (AGN) feedback that removes large quantities of hot gas from
galaxy groups and Wilkinson Microwave Anisotropy Probe 7-yr best-fitting
cosmological parameters provides the best match to the measurements. All
baryonic models in the context of a Planck cosmology overpredict the
observed signal. Similar cosmological conclusions are drawn when we
employ a halo model with the observed 'universal' pressure profile.
KW - gravitational lensing: weak
KW - dark matter
KW - large-scale structure of Universe
U2 - 10.1093/mnras/stx1659
DO - 10.1093/mnras/stx1659
M3 - Article
VL - 471
SP - 1565
EP - 1580
JO - Monthly Notices of the Royal Astronomical Society
JF - Monthly Notices of the Royal Astronomical Society
SN - 0035-8711
IS - 2
ER -