{"672524":{"#nid":"672524","#data":{"type":"external_news","title":"Inferring chemical disequilibrium biosignatures for Proterozoic Earth-like exoplanets","body":[{"value":"\u003Cp\u003EChemical disequilibrium quantified using the available free energy has previously been proposed as a potential biosignature. However, researchers remotely sensing exoplanet biosignatures have not yet investigated how observational uncertainties impact the ability to infer a life-generated available free energy. This study\u0027s researchers pair an atmospheric retrieval tool to a thermodynamics model to assess the detectability of chemical disequilibrium signatures of Earth-like exoplanets, focusing on the Proterozoic eon when the atmospheric abundances of oxygen\u2013methane disequilibrium pairs may have been relatively high. One of the study\u0027s authors is \u003Ca href=\u0022https:\/\/eas.gatech.edu\/people\/reinhard-dr-chris\u0022\u003EChris Reinhard\u003C\/a\u003E, associate professor in the \u003Ca href=\u0022https:\/\/eas.gatech.edu\u0022\u003ESchool of Earth and Atmospheric Sciences\u003C\/a\u003E.\u0026nbsp;\u003C\/p\u003E\r\n","summary":"","format":"limited_html"}],"field_subtitle":"","field_summary":[{"value":"\u003Cp\u003EChemical disequilibrium quantified using the available free energy has previously been proposed as a potential biosignature. However, researchers remotely sensing exoplanet biosignatures have not yet investigated how observational uncertainties impact the ability to infer a life-generated available free energy. This study\u0027s researchers pair an atmospheric retrieval tool to a thermodynamics model to assess the detectability of chemical disequilibrium signatures of Earth-like exoplanets, focusing on the Proterozoic eon when the atmospheric abundances of oxygen\u2013methane disequilibrium pairs may have been relatively high. One of the study\u0027s authors is \u003Ca href=\u0022https:\/\/eas.gatech.edu\/people\/reinhard-dr-chris\u0022\u003EChris Reinhard\u003C\/a\u003E, associate professor in the \u003Ca href=\u0022https:\/\/eas.gatech.edu\u0022\u003ESchool of Earth and Atmospheric Sciences\u003C\/a\u003E.\u0026nbsp;\u003C\/p\u003E\r\n","format":"limited_html"}],"field_summary_sentence":"","uid":"34434","created_gmt":"2024-01-29 15:39:34","changed_gmt":"2024-01-29 15:39:34","author":"Renay San Miguel","boilerplate_text":"","field_publication":"","publication":"Nature Astronomy ","field_article_url":"","publication_url":"https:\/\/www.nature.com\/articles\/s41550-023-02145-z","dateline":{"date":"2024-01-22T00:00:00-05:00","iso_date":"2024-01-22T00:00:00-05:00","tz":"America\/New_York"},"extras":[],"groups":[{"id":"1278","name":"College of Sciences"},{"id":"364801","name":"EAS"}],"categories":[{"id":"136","name":"Aerospace"},{"id":"146","name":"Life Sciences and Biology"},{"id":"135","name":"Research"},{"id":"134","name":"Student and Faculty"}],"keywords":[{"id":"4896","name":"College of Sciences"},{"id":"166926","name":"School of Earth and Atmospheric Sciences"},{"id":"170504","name":"Chris Reinhard"},{"id":"722","name":"Astrobiology"},{"id":"7579","name":"biomarkers"},{"id":"170509","name":"exoplanets"}],"core_research_areas":[],"news_room_topics":[],"event_categories":[],"invited_audience":[],"affiliations":[],"classification":[],"areas_of_expertise":[],"news_and_recent_appearances":[],"phone":[],"contact":[],"email":[],"slides":[],"orientation":[],"userdata":""}}}