A Tentative Detection of the Cosmic Infrared Background at 3.5 microns Using COBE/DIRBE Observations

Details A Tentative Detection of the Cosmic Infrared Background at 3.5 microns Using COBE/DIRBE Observations A Tentative Detection of the Cosmic Infrared Background at 3.5 microns Using COBE/DIRBE Observations

1999-01-05

arxiv.org/abs/astro-ph/9901045v1

Astronomy and Astrophysics

Astrophysics

6 pages, to appear in the proceedings of the 9th Annual October Conference in Maryland "After the Dark Ages", eds. S. S. Holt

Scientific paper

Foreground emission and scattered light from interplanetary dust (IPD) particles and emission from Galactic stellar sources are the greatest obstacles for determining the cosmic infrared background (CIB) from diffuse sky measurements in the ~ 1 to 5 micron range. We describe a new method for deriving the CIB at near infrared wavelengths which reduces the uncertainties associated with the removal of the Galactic stellar emission component from the sky maps. The method produces positive residuals at 3.5 and 4.9 microns, of which only the 3.5 micron residual is nearly isotropic. We consider our result as a tentative detection of the CIB at this wavelength.

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