Results 21 to 30 of about 283 (144)

Technosignatures in the Solar System

, 2022
Abstract: NASA has five robotic space probes on escape trajectories from the solar system (Pioneer 11, Pioneer 12, Voyager 1, Voyager 2, and New Horizons), and the Interstellar Probe is a concept likely to be submitted for consideration in the forthcoming Solar & Space Physics Decadal Survey.
Joseph Lazio
openaire   +3 more sources

The Fermi Paradox Revisited: Technosignatures and the Contact Era

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.
Wandel, Amri
openaire   +3 more sources

Evaluation of Several Computer Vision Feature Detectors/Extractors on Ahuna Mons Region in Ceres and Its Implications for Technosignatures Search. [PDF]

Vision (Basel), 2022
Ahuna Mons is a 4 km particular geologic feature on the surface of Ceres, of possibly cryovolcanic origin. The special characteristics of Ahuna Mons are also interesting in regard of its surrounding area, especially for the big crater beside it.
De la Torre GG.
europepmc   +3 more sources

Using Anomaly Detection to Search for Technosignatures in Breakthrough Listen Observations

The Astronomical Journal
We implement a machine learning algorithm to search for extraterrestrial technosignatures in radio observations of several hundred nearby stars, obtained with the Parkes and Green Bank Telescopes by the Breakthrough Listen collaboration.
Snir Pardo, Dovi Poznanski, Steve Croft, Andrew P. V. Siemion, Matthew Lebofsky   +4 more
doaj   +3 more sources

Artificial Greenhouse Gases as Exoplanet Technosignatures [PDF]

The Astrophysical Journal
Atmospheric 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, Thomas J. Fauchez, Jacob Haqq-Misra, Ravi K. Kopparapu, Daniel Angerhausen, Daria Pidhorodetska, Michaela Leung, Evan L. Sneed, Elsa Ducrot   +8 more
doaj   +3 more sources

A deep-learning search for technosignatures from 820 nearby stars [PDF]

, 2023
The goal of the search for extraterrestrial intelligence (SETI) is to quantify the prevalence of technological life beyond Earth via their ‘technosignatures’. One theorized technosignature is narrowband Doppler drifting radio signals.
Vishal Gajjar, Daniel Czech, Hoang, John, Sheikh, Sofia Z., Peter Xiangyuan Ma, Andrew P. V. Siemion, S. Pete Worden, John Hoang, Imke de Pater, Danny C. Price, de Pater, Imke, Howard Isaacson, MacMahon, David H. E., Worden, S. Pete, Jamie Drew, Siemion, Andrew P. V., Gajjar, Vishal, Croft, Steve, Cherry Ng, Ma, Peter Xiangyuan, Isaacson, Howard, Ng, Cherry, Sofia Z. Sheikh, Lebofsky, Matt, Matt Lebofsky, Steve Croft, Leandro Rizk, Drew, Jamie, Rizk, Leandro, Czech, Daniel, Bryan Brzycki, Price, Danny C., David H. E. MacMahon, Brzycki, Bryan   +33 more
core   +1 more source

Life detection in a universe of false positives

BioEssays, Volume 45, Issue 12, December 2023., 2023
The ultimate goal of astrobiology is to determine the distribution and diversity of life in the universe. But there's a big problem: Most of the planets in our universe are outside our reach. For these exoplanets, can we really ever be certain if they contain life or not?
Harrison B. Smith, Cole Mathis
wiley   +1 more source

Technosignatures as a Priority in Planetary Science [PDF]

Bulletin of the AAS, 2021
Are we alone? ​ The study of technosignatures, physical manifestations of technology from extraterrestrial intelligences, is a rigorous astrobiological sub-discipline. The Planetary Science decadal should include searches for technosignatures alongside biosignatures in its recommendations for funding a robust astrobiology research portfolio.
Sheikh, Sofia, Berea, Anamaria, Davis, Ross, Torre, Gabriel G. De la, DeMarines, Julia, Fisher, Theresa, Foote, Searra, Gelino, Dawn, Grinspoon, David, Profitiliotis, George, Sessa, Alexander M., Singam, Caitlyn, Sneed, Evan L., Vidal, Clement, Wright, Jason T.   +14 more
openaire   +2 more sources

The Resilience of Habitable Climates Around Circumbinary Stars

Journal of Geophysical Research: Planets, Volume 125, Issue 9, September 2020., 2020
Abstract Here we use a 3‐D climate system model to study the habitability of Earth‐like planets orbiting in circumbinary systems. In the most extreme cases, Earth‐like planets in circumbinary systems could experience variations in the incident stellar flux of up to ~50% on ~100‐day timescales.
Eric T. Wolf, Jacob Haqq‐Misra, Ravi Kopparapu, Thomas J. Fauchez, William F. Welsh, Stephen R. Kane, Veselin Kostov, Siegfried Eggl   +7 more
wiley   +1 more source

Persistence of Technosignatures: A Comment on Lingam and Loeb [PDF]

Astrobiology, 2019
In a recent article in this journal, Lingam and Loeb developed an excellent heuristic for searches for biosignatures versus technosignatures. We consider two ways in which their approach could be extended and sharpened, with focus on durability of technosignatures.
Ćirković, Milan M., Vukotić, Branislav, Stojanović, Milan   +2 more
openaire   +3 more sources