Ben Jacobson-Bell, S. Croft, Vishal Gajjar, Blayne M. Griffin, E. F. Keane, Brian C. Lacki, Matt Lebofsky, David H. E. MacMahon, Andrew Siemion
Abstract LHS 1140b, a rocky exoplanet in its host star’s habitable zone, was recently shown to have an escaping helium atmosphere. We present a search for narrowband radio technosignatures in archival Breakthrough Listen observations toward the LHS 1140 system using the 100 m Robert C. Byrd Green Bank Telescope at 1–12 GHz. We report a nondetection of candidate signals above 300 GW.