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Measurements of the cosmic microwave background temperature at 1.47 GHz

1993; IOP Publishing; Volume: 409; Linguagem: Inglês

10.1086/172637

1538-4357

M. Bensadoun, M. Bersanelli, Giovanni De Amici, A. Kogut, S. Levin, M. Limon, G. F. Smoot, C. Witebsky,

Dark Matter and Cosmic Phenomena

view Abstract Citations (36) References (40) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS Measurements of the Cosmic Microwave Background Temperature at 1.47 GHz Bensadoun, M. ; Bersanelli, M. ; de Amici, G. ; Kogut, A. ; Levin, S. M. ; Limon, M. ; Smoot, G. F. ; Witebsky, C. Abstract We have used a radio-frequency-gain total-power radiometer to measure the intensity of the cosmic microwave background (CMB) at a frequency of 1.47 GHz (20.4 cm wavelength) from White Mountain, California in 1988 September and from the South Pole, Antarctica in 1989 December. The CMB thermodynamic temperature, T_CMB_ is 2.27+/-0.25 K (68% confidence limit) measured from White MountaIn and 2.26+/-0.20 K from the South Pole site. The combined result is 2.26 +/- 0.19 K. The correction for Galactic emission has been derived from scaled low-frequency maps and constitutes the main source of error. The atmospheric signal is extrapolated from our zenith scan measurements at higher frequencies. These results are consistent with our previous measurement at 1.41 GHz (Levin et al. 1988) and ~2.5 σ from the 2.74 +/- 0.01 K global average CMB temperature. Publication: The Astrophysical Journal Pub Date: May 1993 DOI: 10.1086/172637 Bibcode: 1993ApJ...409....1B Keywords: Background Radiation; Microwaves; Radio Frequencies; Relic Radiation; Sky Brightness; Temperature Measurement; Galactic Radiation; Microwave Radiometers; Astrophysics; COSMOLOGY: COSMIC MICROWAVE BACKGROUND; COSMOLOGY: OBSERVATIONS full text sources ADS |