Low-frequency measurements of the CMB spectrum

Details Low-frequency measurements of the CMB spectrum Low-frequency measurements of the CMB spectrum

Jan 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990aipc..198...71k&link_type=abstract

IN: Astrophysics in Antarctica (A92-22401 07-89). New York, American Institute of Physics, 1989, p. 71-74. Previously announced

Astronomy and Astrophysics

Astrophysics

2

Background Radiation, Cosmic Rays, Frequency Measurement, Low Frequencies, Microwave Spectra, Temperature Dependence

Scientific paper

As part of an extended program to characterize the spectrum of the cosmic microwave background (CMB) at low frequencies, multiple measurements were performed from a high-altitude site in California. On average, these measurements suggest a CMB temperature slightly lower than measuremetns at higher frequencies. Atmospheric conditions and the encroachment of civilization are now significant limitations from the present observing site. In November 1989, new measurements will be made from the South Pole Amundsen-Scott Station at frequencies 0.82, 1.5, 2.5, 3.8, 7.5, and 90 GHz. Recent measurements are discussed and improvements indicated from a polar observing site.

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