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2000ApJ...544...81F - Astrophys. J., 544, 81-97 (2000/November-3)
Detection of a far-infrared excess with DIRBE at 60 and 100 microns.
FINKBEINER D.P., DAVIS M. and SCHLEGEL D.J.
Abstract (from CDS):
The IR excess detected at 140 and 240 µm by these methods agrees with previous measurements, which are thought to be the cosmic infrared background (CIB). The detections at 60 and 100 µm are new. The integrated IR excess in the window 45-125 µm is 23±8 nW.m–2.sr–1, to be added to the 18±4 nW.m–2.sr–1 previously measured with the DIRBE and FIRAS instruments in the window 125-2 mm. While this new excess is not necessarily the CIB, we have ruled out all known sources of emission in the solar system and Galaxy. We therefore tentatively interpret this signal as the CIB and consider the implications of such energy production from the viewpoint of star formation efficiency and black hole accretion efficiency. However, the IR excess exceeds limits on the CIB derived from the inferred opacity of the intergalactic medium to observed TeV photons, thus casting doubt on this interpretation. There is currently no satisfactory explanation for the 60-100 µm excess.
Abstract Copyright: ∼
Journal keyword(s): Cosmology: Observations - Cosmology: Diffuse Radiation - Galaxies: Active - Gamma Rays: Observations - Infrared: ISM: Continuum - Interplanetary Medium
Simbad objects: 3
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