A 1.1-1.9 GHz SETI SURVEY OF THE KEPLER FIELD. I. A SEARCH FOR NARROW-BAND EMISSION FROM SELECT TARGETS

作者：Siemion Andrew P V^*; Demorest Paul; Korpela Eric; Maddalena Ron J; Werthimer Dan; Cobb Jeff; Howard Andrew W; Langston Glen; Lebofsky Matt; Marcy Geoffrey W; Tarter Jill

来源：Astrophysical Journal, 2013, 767(1): 94.

DOI：10.1088/0004-637X/767/1/94

• astrobiology
• extraterrestrial intelligence
• planets and satellites: detection
• planets and satellites: general
• surveys

We present a targeted search for narrow-band (<5 Hz) drifting sinusoidal radio emission from 86 stars in the Kepler field hosting confirmed or candidate exoplanets. Radio emission less than 5 Hz in spectral extent is currently known to only arise from artificial sources. The stars searched were chosen based on the properties of their putative exoplanets, including stars hosting candidates with 380 K > T-eq > 230 K, stars with five or more detected candidates or stars with a super-Earth (Rp < 3 R.) in a > 50 day orbit. Baseband voltage data across the entire band between 1.1 and 1.9 GHz were recorded at the Robert C. Byrd Green Bank Telescope between 2011 February and April and subsequently searched offline. No signals of extraterrestrial origin were found. We estimate that fewer than similar to 1% of transiting exoplanet systems host technological civilizations that are radio loud in narrow-band emission between 1 and 2 GHz at an equivalent isotropically radiated power (EIRP) of similar to 1.5 x 1021 erg s(-1), approximately eight times the peak EIRP of the Arecibo Planetary Radar, and we limit the number of 1-2 GHz narrow-band-radio-loud Kardashev type II civilizations in the Milky Way to be < 10-6 M-1. Here we describe our observations, data reduction procedures and results.

• 出版日期2013-4-10