Clustering of the Diffuse Infrared Light from the COBE DIRBE maps. I.

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. The cosmic infrared background (CIB) and its anisotropy have not yet been measured, but are important signatures of the early evolution and clustering of galaxies. The near IR is particularly interesting because redshift effects bring the peak luminosity of distant galaxies into the near IR, allowing high redshift objects to dominate the theoretical predictions of the CIB and its fluctuations. This paper is devoted to studying the CIB through its correlation properties. We studied the limits on CIB anisotropy in the near IR (1.25, 2.2, and 3.5 ¯m, or J; K; L) bands at a scale of 0.7 ffi using the COBE 1 Diffuse Infrared Background Experiment (DIRBE) data. In single bands we obtain the upper limits on the zero-lag correlation signal C(0) = h( ffi I ) 2 i ! 3:6 Theta 10 Gamma16 ; 5:1 Theta 10 Gamma17 ; 5:7 Theta 10 Gamma18 W 2 m Gamma4 sr Gamma2 for the J; K; L bands respectively. The DIRBE data exhibit a clear color between the various bands with a small ...

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