Low-Frequency Measurements of the CMB Spectrum

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

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Kogut, A.; Bensadoun, M.; De Amici, Giovanni; Levin, S.; Limon,M.; Smoot, George F. et al. October 1, 1989.

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Description

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

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6

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  • Journal Name: The Astrophysical Journal Letters; Journal Volume: 291; Related Information: Journal Publication Date: 1985

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  • Report No.: LBL--28024
  • Grant Number: DE-AC02-05CH11231
  • Office of Scientific & Technical Information Report Number: 893048
  • Archival Resource Key: ark:/67531/metadc882991

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  • October 1, 1989

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  • Sept. 21, 2016, 2:29 a.m.

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  • Sept. 29, 2016, 8:54 p.m.

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Kogut, A.; Bensadoun, M.; De Amici, Giovanni; Levin, S.; Limon,M.; Smoot, George F. et al. Low-Frequency Measurements of the CMB Spectrum, article, October 1, 1989; Berkeley, California. (digital.library.unt.edu/ark:/67531/metadc882991/: accessed August 19, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.