A precise measurement of the cosmic background radiation at 1.32 millimeters

Details A precise measurement of the cosmic background radiation at 1.32 millimeters A precise measurement of the cosmic background radiation at 1.32 millimeters

Jul 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990apj...357...14p&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 357, July 1, 1990, p. 14-22.

Astronomy and Astrophysics

Astrophysics

36

Absorption Spectra, Cn Emission, Interstellar Gas, Line Spectra, Radiation Measurement, Relic Radiation, Atmospheric Correction, Black Body Radiation, Rocket-Borne Instruments

Scientific paper

A precise value of the cosmic background radiation temperature at 1.32 mm has been determined from the interstellar absorption lines of the CN molecule toward HD 154368. Equivalent widths for CN and (C-13)N in the main cloud are reported. A very weak secondary cloud has been discovered. Millimeter observations at 2.64 mm revealed weak CN emission from the main cloud with T-asterisk(R) = 19.0 + or - 5.1 mK. Thus there is some local excitation of CN. Correcting for this yields T(CBR) = 2.832 + or - 0.072 K at 1.32 mm which when combined with the result of Meyer et al. (1989) gives the T(CBR) = 2.831 + or - 0.056 K at 1.32 mm. At 2.64 mm, T(CBR) = 2.834 + or - 0.085 K is found.

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