Physics
Scientific paper
Jan 1994
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994icar..107..215s&link_type=abstract
Icarus, vol. 107, p. 215
Physics
1
Project Seti, Stellar Spectra, Hyperfine Structure, Line Spectra, Positronium, Technology Assessment, Fourier Transformation, Millimeter Waves
Scientific paper
Results of observations of 40 solar-type stars and of three regions near the galactic center at frequencies near the 203.385-GHz positronium hyperfine resonance, a potential natural reference frequency, are described. While no artificial signals were detected, an upper limit on potential signal flux density is derived, and approaches for quicker, more sensitive searches are presented.
Deboer David Robert
Steffes Paul Gregory
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