Results 61 to 70 of about 588 (145)
Developing a Drift Rate Distribution for Technosignature Searches of Exoplanets
The Astronomical Journal, 2023 A stable-frequency transmitter with relative radial acceleration to a receiver will show a change in received frequency over time, known as a “drift rate.” For a transmission from an exoplanet, we must account for multiple components of drift rate: the ...
Megan G. Li +6 more
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NASA and the Search for Technosignatures: A Report from the NASA Technosignatures Workshop
, 2018 This report is the product of the NASA Technosignatures Workshop held at the Lunar and Planetary Institute in Houston, Texas, in September 2018. This workshop was convened by NASA for the organization to learn more about the current field and state of the art of searches for technosignatures, and what role NASA might play in these searches in the ...
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Artificial Greenhouse Gases as Exoplanet Technosignatures
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
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, 2022 In this second installment of SETI in 20xx, we very briefly and subjectively review developments in SETI in 2021. Our primary focus is 93 papers and books published or made public in 2021, which we sort into six broad categories: results from actual ...
Huston, Macy J., Wright, Jason T.
core
A Novel Technosignature Search in the Breakthrough Listen Green Bank Telescope Archive
The Astronomical JournalThe Breakthrough Listen program is, to date, the most extensive search for technological life beyond Earth. Over the past 9 yr, it has surveyed thousands of nearby stars and close to 100 nearby galaxies with telescopes around the world, including the ...
Caleb Painter +7 more
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Searches for Technosignatures: The State of the Profession
, 2019 Submitted as an APC white paper to the Astro2020 Decadal ...
Wright, Jason +126 more
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Radio Technosignature Searches of TESS Targets
, 2021 A practical method to perform a Search for Extraterrestrial Intelligence is to search the sky for extraterrestrial signals, also known as technosignatures. A technosignature search of many nearby systems is currently underway by the Breakthrough Listen Initiative.
Franz, Noah, Croft, Steve
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The Astronomical JournalRadio wave Observations on the Lunar Surface of the photo-Electron Sheath (ROLSES-1) instrument on board Intuitive Machines’ Odysseus lunar lander represents NASA’s first radio telescope on the Moon, and the first United States spacecraft landing on the ...
Joshua J. Hibbard +10 more
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Exo–IPM Scattering as a Hidden Gatekeeper of Narrowband Technosignatures
The Astrophysical JournalNarrowband radio technosignatures can be significantly modulated by the host star’s exoplanetary interplanetary medium (Exo-IPM), where turbulence in stellar winds and coronal mass ejections (CMEs) imprint spectral broadening.
Vishal Gajjar, Grayce C. Brown
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Rotational Doppler Cartography of Technosignatures on Unresolved Planets
The Astrophysical JournalThe discovery of many Earth-like planets has renewed interest in whether life and technological civilizations exist elsewhere. The Search for Extraterrestrial Intelligence (SETI) seeks evidence for technological civilizations via technosignatures across ...
Keitaro Takahashi
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