Cosmic Far-infrared Background Fluctuations as Revealed by FIRBACK Observations

Details Cosmic Far-infrared Background Fluctuations as Revealed by FIRBACK Observations Cosmic Far-infrared Background Fluctuations as Revealed by FIRBACK Observations

Jan 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001iaus..204..263l&link_type=abstract

The Extragalactic Infrared Background and its Cosmological Implications, Proceedings of IAU Symposium #204, held 15-18 August 20

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We have used the FIRBACK field observations with ISOPHOT at 170 μm to search for the Cosmic Far-InfraRed Background fluctuations. Our study is based on a power spectrum analysis which allows us to statistically separate each of the background components (galactic and extra-galactic). We show in FIRBACK fields that the extra-galactic background fluctuations are well above the instrumental noise and the cirrus confusion noise. The observed power spectrum shows a flattening at high spatial frequencies which is due to extra-galactic unresolved sources. The level of the extra-galactic power spectrum fluctuations is nearly the same in all FIRBACK fields. This is the first time that fluctuations due to unresolved extra-Galactic sources have been isolated at far-infrared wavelengths.

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