Cross-correlation between the soft X-ray background and SZ Sky

Abstract

While both X-ray emission and Sunyaev-Zel'dovich (SZ) temperature fluctuations are generated by the warm-hot gas in dark matter halos, the two observables have different dependence on the underlying physical properties, including the gas distribution. A cross-correlation between the soft X-ray background (SXRB) and the SZ sky may allow an additional probe on the distribution of warm-hot gas at intermediate angular scales and redshifts complementing studies involving clustering within SXRB and SZ separately. Using a halo approach, we investigate this cross-correlation analytically. The two contributions are correlated mildly with a correlation coefficient of $\sim 0.3$, and this relatively low correlation presents a significant challenge for its detection. The correlation, at small angular scales, is affected by the presence of radiative cooling or preheating and provides a probe on the thermal history of the hot gas in dark halos. While the correlation remains undetectable with CMB data from the WMAP satellite and X-ray background data from existing catalogs, upcoming observations with CMB missions such as Planck, for the SZ side, and an improved X-ray map of the large scale structure, such as the one planned with DUET mission, may provide a first opportunity for a reliable detection of this cross-correlation.

arXiv comment8 pages, 6 figures, accepted for publication in A&A

References in corpus (36)

• First Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Determination of Cosmological Parameters
• Profiles of dark haloes: evolution, scatter, and environment
• Statistical Properties of X-ray Clusters: Analytic and Numerical Comparisons
• Halo Models of Large Scale Structure
• Mass function of dark matter halos
• The Cosmic Baryon Budget
• Simulations of X-ray Clusters
• Where are the Baryons?
• Baryons in the Warm-Hot Intergalactic Medium
• Density profiles and substructure of dark matter halos: converging results at ultra-high numerical resolution
• The Imprint of Galaxy Formation on X-ray Clusters
• The Sunyaev-Zel'dovich angular power spectrum as a probe of cosmological parameters
• The Birmingham-CfA cluster scaling project - III: entropy and similarity in galaxy systems
• The intragroup medium in loose groups of galaxies
• Chandra Discovery of a Tree in the X-ray Forest towards PKS 2155-304: the Local Filament?
• Regulation of the X-ray luminosity of clusters of galaxies by cooling and supernova feedback
• Simulating the Sunyaev-Zel'dovich effect(s): including radiative cooling and energy injection by galactic winds
• Foregrounds and CMB Experiments: I. Semi-analytical estimates of contamination
• Chandra Detection of OVIII Ly-alpha Absorption from an Overdense Region in the Intergalactic Medium
• Imprint of Reionization on the Cosmic Microwave Background Bispectrum
• XMM-Newton confirmation of Soft X-ray excess emission in clusters of galaxies - the discovery of O VII emission from an extended warm baryonic component
• The Far-Infrared Background Correlation with CMB Lensing
• Large-Scale Sunyaev-Zel'dovich Effect: Measuring Statistical Properties with Multifrequency Maps
• Radio Sources in Galaxy Clusters at 28.5 GHz
• The impact of cooling and pre-heating on the Sunyaev-Zel'dovich effect
• Soft X-ray excess emission in clusters of galaxies observed with XMM-Newton
• Warm-hot intergalactic baryons revealed
• The X-ray surface brightness distribution from diffuse gas
• The Effect of radiative cooling on the scale-dependence of global stellar and gas contents of groups and clusters of galaxies
• Discriminating between unresolved point sources and "negative" SZ clusters in CMB maps
• Radio Point Sources and the Thermal SZ Power Spectrum
• Missing baryons and the soft X-ray background
• The Effect of Radiative Cooling on the Sunyaev-Zel'dovich Cluster Counts and Angular Power Spectrum: Analytic Treatment
• Can radiative cooling and nongravitational heating explain simultaneously the global X-ray properties of clusters and the unresolved cosmic X-ray background ?
• Measuring Feedback Using the Intergalactic Medium State and Evolution Inferred from the Soft X-ray Background
• Autocorrelation function of the soft X-ray background produced by warm-hot gas in dark halos

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• Sunyaev-Zel'dovich Signal from Quasar Hosts: Implications for Detection of Quasar Feedback
• Probing the circumgalactic baryons through cross-correlations