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Search for Extraterrestrial Intelligence at 22 GHz with the Very Large Array

Published online by Cambridge University Press:  19 September 2017

Toshimichi Shirai ,
Tomoaki Oyama ,
Hiroshi Imai  and
Shinsuke Abe
Toshimichi Shirai
Affiliation:
Goldman Sachs (Japan) Ltd., Akasaka, Minato-ku, Tokyo, Japan toshimichi.shirai@gs.com
Tomoaki Oyama
Affiliation:
Department of Astronomy, School of Science, University of Tokyo, Hongoh, Bunkyo-ku, Tokyo, Japan
Hiroshi Imai
Affiliation:
Joint Institute for VLBI in Europe, Postbos 2, 7990AA, Dwingeloo, The Netherlands
Shinsuke Abe
Affiliation:
Inst. of Space and Astronautical Science, Sagamihara, Kanagawa, Japan

Abstract

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We have conducted a direct Search for Extraterrestrial Intelligence at the Water Maser frequency, 22.235 GHz, using the Very Large Array. The targets were 13 solar-type stars that were known to host exoplanetary systems. In all cases, the RMS limits of the flux density, 20 mJy (5σ), were sufficient to rule out any omnidirectional transmitters of the same power as terrestrial radars (5 × 1012 W). We discuss the significance of this non-detection.

Type
Search for Extraterrestrial Intelligence (SETI)
Information
Symposium - International Astronomical Union , Volume 213: Bioastronomy 2002: Life Among the stars , 2004 , pp. 423 - 428
Copyright
Copyright © Astronomical Society of the Pacific 2004 

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