CROSS-CORELATION OF THE 2-10 keV X-RAY BACKGROUND WITH RADIO SOURCES: CONSTRAINING THE LARGE-SCALE STRUCTURE OF THE X-RAY BACKGROUND

摘要

We present cross-correlation analyses of the HEAO 2-10 keV diffuse X-ray map with both the com- bined GB6/Parkes-MIT-NRAO (GB6-PMN) 5 GHz and the FIRST 1.4 GHz radio surveys. The cross- correlation functions (CCFs) of both radio surveys with the unresolved X-ray background were detected at the 5 σ level. While the large angular resolution (3°) of the X-ray map makes it difficult to separate the contributions of clustering from those of Poisson fluctuations, the amplitude of the CCF provides important constraints on the X-ray emissivity of the radio sources, as well as on the clustering properties of radio and X-ray sources.