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- W2057813875 abstract "Abstract The development of advanced millimeter-wave technology has made it possible to construct low-noise receivers and high-power transmitters comparable to those available at much lower frequencies. This technology, plus certain physical characteristics of the millimeter-wave spectrum, suggests possible advantages for use of this wavelength range for interstellar communications. As a result, a SETI (search for extraterrestrial intelligence) type search has been conducted for narrow-bandwidth signals at frequencies near the positronium hyperfine spectral line (203.385 GHz), a potential natural reference frequency. A total of 40 solar-type stars within 23 parsecs were observed, in addition to three locations near the galactic center. No detections were made at the detection threshold of 2.3 × 10 -19 W/m 2 in each of two orthogonal linear polarizations. Future observations will be made with a higher resolution fast Fourier transform spectrum analyzer (FFTSA), which should improve sensitivity by an order of magnitude and reduce required observing time." @default.
- W2057813875 created "2016-06-24" @default.
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- W2057813875 date "1994-01-01" @default.
- W2057813875 modified "2023-09-26" @default.
- W2057813875 title "A SETI Search of Nearby Solar-Type Stars at the 203-GHz Positronium Hyperfine Resonance" @default.
- W2057813875 doi "https://doi.org/10.1006/icar.1994.1019" @default.
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