Cosmic Background Radiation at 1.32 mm

Details Cosmic Background Radiation at 1.32 mm Cosmic Background Radiation at 1.32 mm

Jun 1972

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1972phrvl..28.1541h&link_type=abstract

Physical Review Letters, vol. 28, Issue 23, pp. 1541-1544

Physics

25

Scientific paper

The position of the R(0), R(1), and R(2) lines of the 3874-Å band of interstellar CN in the spectrum of the star ζ Ophiuchi were scanned with a Fabry-Perot interferometer. The Doppler width (full width at half-maximum) of the R(0) line is 28 mÅ. At the expected position of the R(2) line an absorption feature was found with an equivalent width of 0.077 +/- 0.055 mÅ which implies a temperature of 2.9+3.4-2.1 K for the cosmic background radiation at 1.32 mm. A conservative interpretation of the data is simply to give an upper limit (2σ) of 3.8 K to this temperature.

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