Results 81 to 90 of about 706 (217)

Projections of Earth’s Technosphere: Strategies for Observing Technosignatures on Terrestrial Exoplanets

The Astrophysical Journal Letters
The search for technosignatures—remotely detectable evidence of extraterrestrial technology—draws upon examples from the recent history of Earth as well as projections of Earth’s technosphere.
Jacob Haqq-Misra, Ravi K. Kopparapu, George Profitiliotis   +2 more
doaj   +1 more source

Captain Cook, the Terrestrial Planet Finder and the Search for Extraterrestrial Intelligence [PDF]

, 2004
Charles Beichman
openalex   +1 more source

Does Intelligence Matter? An Interdisciplinary Guidance Statement on the Search for Extraterrestrial Intersections

, 2023
Matthew D. Lamb, Michele Mekel, Chelsea Haramia, Theresa Fisher   +3 more
openalex   +1 more source

Searching the SN 1987A SETI Ellipsoid with TESS

The Astronomical Journal
The SETI Ellipsoid is a strategy for technosignature candidate selection that assumes that extraterrestrial civilizations who have observed a galactic-scale event—such as supernova 1987A—may use it as a Schelling point to broadcast synchronized signals ...
Bárbara Cabrales, James R. A. Davenport, Sofia Sheikh, Steve Croft, Andrew P. V. Siemion, Daniel Giles, Ann Marie Cody   +6 more
doaj   +1 more source

Time Markers for SETI in Binary Systems: History and Prospects

Astronomy
Contemporary surveys in the search for extraterrestrial intelligence (SETI) typically make one-off “spot scans” across the sky to search planetary systems for narrow-band radio signals that would indicate the presence of intelligent life.
Jacob Haqq-Misra
doaj   +1 more source

Anomaly Detection and Radio-frequency Interference Classification with Unsupervised Learning in Narrowband Radio Technosignature Searches

The Astronomical Journal
The search for radio technosignatures is an anomaly detection problem: Candidate signals represent needles of interest in the proverbial haystack of radio-frequency interference (RFI). Current search frameworks find an enormity of false-positive signals,
Ben Jacobson-Bell, Steve Croft, Carmen Choza, Alex Andersson, Daniel Bautista, Vishal Gajjar, Matthew Lebofsky, David H. E. MacMahon, Caleb Painter, Andrew P. V. Siemion   +9 more
doaj   +1 more source

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

, 2004
Toshimichi Shirai, Tomoaki Oyama, Hiroshi Imai, Shinsuke Abe   +3 more
openalex   +1 more source

Search for extraterrestrial intelligence

, 2017
Howard Isaacson, A. Siemion, Geoffrey W. Marcy, Matt Lebofsky, Danny C. Price, David MacMahon, S. Croft, Dave DeBoer, J. Hickish, Dan Werthimer, Sofia Z. Sheikh, Grégory Hellbourg, J. Emilio Enriquez   +12 more
openalex   +2 more sources

A Radio Technosignature Search of TRAPPIST-1 with the Allen Telescope Array

The Astronomical Journal
Planet–planet occultations (PPOs) occur when one exoplanet occults another exoplanet in the same system, as seen from the Earth’s vantage point. PPOs may provide a unique opportunity to observe radio “spillover” from extraterrestrial intelligences’ radio
Nick Tusay, Sofia Z. Sheikh, Evan L. Sneed, Wael Farah, Alexander W. Pollak, Luigi F. Cruz, Andrew Siemion, David R. DeBoer, Jason T. Wright   +8 more
doaj   +1 more source

Potential Technosignature from Anomalously Low Deuterium/Hydrogen in Planetary Water Depleted by Nuclear Fusion Technology

The Astrophysical Journal
Deuterium–deuterium (DD) fusion is viewed as an ideal energy source for humanity in the far future, given a vast seawater supply of D. Here, we consider long-lived, extraterrestrial, technological societies that develop DD fusion.
David C. Catling, Joshua Krissansen-Totton, Tyler D. Robinson   +2 more
doaj   +1 more source