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Title: Global warming as a detectable thermodynamic marker of Earth-like extrasolar civilizations: The case for a telescope like Colossus
Authors: Kuhn, Jeff R.Berdyugina, Svetlana V.
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Issue Date: 2015
Published in: International Journal of Astrobiology, Volume 14, Issue 3, Page 401-410
Publisher: Cambridge : Cambridge University Press
Abstract: Earth-like civilizations generate heat from the energy that they utilize. The thermal radiation from this heat can be a thermodynamic marker for civilizations. Here we model such planetary radiation on Earth-like planets and propose a strategy for detecting such an alien unintentional thermodynamic electromagnetic biomarker. We show that astronomical infrared (IR) civilization biomarkers may be detected within an interestingly large cosmic volume using a 70 m-class or larger telescope. In particular, the Colossus telescope with achievable coronagraphic and adaptive optics performance may reveal Earth-like civilizations from visible and IR photometry timeseries’ taken during an exoplanetary orbit period. The detection of an alien heat signature will have far-ranging implications, but even a null result, given 70 m aperture sensitivity, could also have broad social implications.
Keywords: civilization biomarker; extraterrestrial civilizations; global warming; Kardashev Type I civilizations
DDC: 530
License: CC BY 3.0 Unported
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