Results 1 to 10 of about 836 (165)
A VERITAS/Breakthrough Listen Search for Optical Technosignatures [PDF]
The Astronomical Journal, 2023 The Breakthrough Listen Initiative is conducting a program using multiple telescopes around the world to search for “technosignatures”: artificial transmitters of extraterrestrial origin from beyond our solar system.
A. Acharyya +68 more
doaj +4 more sources
Fully fluorinated non-carbon compounds NF3 and SF6 as ideal technosignature gases. [PDF]
Sci Rep, 2023 Waste gas products from technological civilizations may accumulate in an exoplanet atmosphere to detectable levels. We propose nitrogen trifluoride (NF3) and sulfur hexafluoride (SF6) as ideal technosignature gases.
Seager S +5 more
europepmc +4 more sources
Setigen: Simulating Radio Technosignatures for SETI [PDF]
, 2022 The goal of the search for extraterrestrial intelligence (SETI) is the detection of non-human technosignatures, such as technology-produced emission in radio observations. While many have speculated about the character of such technosignatures, radio SETI fundamentally involves searching for signals that not only have never been detected, but also have
Bryan Brzycki +8 more
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Technosignatures: Frameworks for Their Assessment
The Astrophysical Journal, 2023 In view of the promising advancements in technosignature science, the question of what constitutes a robust technosignature is rendered crucial. In this paper, we first delineate a Bayesian framework for ascertaining the reliability of potential ...
Manasvi Lingam +5 more
doaj +2 more sources
Exoplanet Occultations as Technosignature Targets
, 2021 Recent SETI surveys have increased the fraction of the cosmic haystack that has been analyzed by focusing on increasing the number of studied target systems and the total time each target is observed. However, few of these surveys have considered when is best to observe their targets; often instead relying on the assumption that technosignature targets
Evan L. Sneed
openalex +3 more sources
Detecting Technosignatures from Earth-scale Civilizations
The Astrophysical Journal, 2023 Assuming civilizations have similar interplanetary communications and radar capability to NASA’s Deep Space Network, what is the feasibility of intercepting their communications? Interplanetary conjunctions between Earth-like exoplanets, their stars, and
Reza Ashtari
doaj +2 more sources
The Fermi Paradox Revisited: Technosignatures and the Contact Era [PDF]
The Astrophysical Journal, 2022 Abstract A new solution to the Fermi Paradox is presented: probes or visits from putative alien civilizations have a very low probability until a civilization reaches a certain age (called the “Contact Era”) after the onset of radio communications.
Amri Wandel
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Technosignatures Longevity and Lindy's Law
The Astronomical JournalThe probability of detecting technosignatures (i.e., evidence of technological activity beyond Earth) increases with their longevity, or the time interval over which they manifest.
Amedeo Balbi, Claudio Grimaldi
doaj +4 more sources
Artificial Greenhouse Gases as Exoplanet Technosignatures [PDF]
The Astrophysical JournalAtmospheric pollutants such as chlorofluorocarbons and NO _2 have been proposed as potential remotely detectable atmospheric technosignature gases. Here we investigate the potential for artificial greenhouse gases including CF _4 , C _2 F _6 , C _3 F _8 ,
Edward W. Schwieterman +8 more
doaj +7 more sources
Undetected Past Contacts with Technological Species: Implications for Technosignature Science
The Astronomical JournalIn the search for extraterrestrial intelligence (SETI), the highly incomplete sampling of the technosignature search space is often considered as a plausible explanation for the persistent lack of detections over six decades of searches. If correct, this
Claudio Grimaldi
doaj +2 more sources