Astronomy and Astrophysics – Astrophysics
Scientific paper
Jun 1994
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994apj...428..447a&link_type=abstract
The Astrophysical Journal, vol. 428, no. 2, pt. 1, p. 447-453
Astronomy and Astrophysics
Astrophysics
8
Background Radiation, Cosmology, Diffuse Radiation, Extraterrestrial Radio Waves, Quasars, Variations, Angular Distribution, Antennas, Millimeter Waves, Submillimeter Waves, Telescopes
Scientific paper
Observations of radio-quiet quasars made by the Swedish ESO Submillimeter Telescope and the Institut de Radio Astronomie Millimetrique antenna at a frequency of 240 GHz have been used to infer upper limits on the sky fluctuations at angular scales of 30, 70, and 140 sec. It is found that (Delta T)/ T less than 1.4x10 (exp-4) at 30 sec, (Delta T)/ T less than 2.4x10 (exp-4) at 70 sec, and (Delta T)/ T less than 1.9x10 (exp-4) at 140 sec. (95% confidence level) for uncorrelated patches of sky. The two former limits are 70% and 10% higher, respectively, if detections of radio-quiet objects are included in the analysis. These limits can be used in the context of (1) models predicting far-infrared cosmic backgrounds originating from primeval dust and (2) models of dusty galaxy evolution. On the basis of these data, most of the primeval dust models can be ruled out and further constraints on the galaxy population contributing to the background can be determined.
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