Ultraviolet-Driven Atmospheric Degeneracies Challenge Conventional Biosignature Frameworks for Terrestrial Planets with Ultracool M Dwarf Hosts: An Archean-Analog TRAPPIST-1 e Case Study

arXiv:2606.05451 · astro-ph.EP, astro-ph.SR · Submitted 2026-06-03 · Read on arXiv

Evan L. Sneed, Edward W. Schwieterman, Sarah R. Peacock, Nicholas F. Wogan, Timothy W. Lyons

astro-ph.EP, astro-ph.SR

Submitted: 2026-06-03

Comments: 23 pages, 7 figures, 1 table. Submitted to AAS Journals. Comments welcome

License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/

Terminology

• Archean — 33× in this paper · explained in 1 episode
• Abundance — 20× in this paper · explained in 1 episode
• Core — 4× in this paper · explained in 2 episodes
• Trace — 3× in this paper · explained in 2 episodes
• Absorption Cross Section — 2× in this paper · explained in 1 episode
• Spectral Signature — 2× in this paper · explained in 2 episodes
• Benchmark — 1× in this paper · explained in 2 episodes
• HST Cosmic Origins Spectrograph — 1× in this paper
• Interpretability — 1× in this paper · explained in 15 episodes
• Mega-MUSCLES Semi-empirical Model — 1× in this paper
• Space Telescope Imaging Spectrograph — 1× in this paper

Sources

• SpectRes: A Fast Spectral Resampling Tool in Python
• Origins Space Telescope Mission Concept Study Report

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