Astronomy and Astrophysics – Astronomy
Scientific paper
Sep 1999
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999aas...19411302k&link_type=abstract
American Astronomical Society Meeting 194, #113.02
Astronomy and Astrophysics
Astronomy
Scientific paper
The cosmic infrared background (CIB) radiation is the cosmic repository for energy release throughout the history of the universe. The spatial fluctuations of the CIB resulting from galaxy clustering are expected to be at least a few percent on scales of a degree, depending on the luminosity and clustering history of the early universe. Using the all-sky data from the COBE DIRBE instrument at wavelengths 1.25-100 mic we attempted to measure the CIB fluctuations. In the near-IR, where the foreground emission is dominated by small scale structure due to stars in the Galaxy, we find a strong correlation between the amplitude of the fluctuations and Galactic latitude after removing bright foreground stars. Using data, where the Galaxy is found to be plane-parallel, we extrapolate the amplitude of the fluctuations to cosec|b|=0. In this way we find a positive statistically signifant isotropic residual in the fluctuations. We demonstrate by detailed and analytical modeling that the residuals in the extrapolation are distributed isotropically and suggest that this extra variance may result from structure in the CIB.
Kashlinsky Alexander
Mather John
Odenwald Sten
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