2024
DOI: 10.3847/1538-4357/ad4ce8
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Artificial Greenhouse Gases as Exoplanet Technosignatures

Edward W. Schwieterman,
Thomas J. Fauchez,
Jacob Haqq-Misra
et al.

Abstract: Atmospheric pollutants such as chlorofluorocarbons and NO2 have been proposed as potential remotely detectable atmospheric technosignature gases. Here we investigate the potential for artificial greenhouse gases including CF4, C2F6, C3F8, SF6, and NF3 to generate detectable atmospheric signatures. In contrast to passive incidental by-products of industrial processes, artificial greenhouse gases would represent an intentional effort to change the climate of a planet with long-lived, low-toxicity gases and would… Show more

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