Astronomy and Astrophysics – Astronomy
Scientific paper
Apr 1991
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991aipc..222...85s&link_type=abstract
In: After the first three minutes; Proceedings of the 1st Astrophysics Workshop, Univ. of Maryland, College Park, Oct. 15-17, 19
Astronomy and Astrophysics
Astronomy
Astronomical Spectroscopy, Cosmic Background Explorer Satellite, Relic Radiation, Balloon-Borne Instruments, Black Body Radiation, Spaceborne Astronomy
Scientific paper
Two recent measurements of the Cosmic Microwave Radiation (CMR) find a spectrum like that of a blackbody with 1 percent accuracy from lambda = 1 cm to 0.5 mm. Done in space with cold instruments, these experiments closely approximate the ideal conditions of no interfering radiation and thermal equilibrium between instrument and radiation. Future direct measurements of the CMR spectrum will concentrate on longer wavelengths, lambda greater than 1 cm. We expect that the field will develop along two lines: balloon-based experiments for lambda less than 10 cm to avoid atmospheric emission; and ground-based experiments for lambda greater than 20 cm where Galactic emission becomes the dominant source of error. This paper reviews experiments for lambda greater than 1 cm and points out some ways that those experiments can be improved to achieve higher accuracy.
Staggs Suzanne
Wilkinson David
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