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Science-Driven Performance Requirements for UV Coronagraph Design: Implications for O$_3$ Detection in Earth-like Atmospheres — arXiv:2610.19081

Source: arXiv (en)
Original: https://arxiv.org/abs/2610.19081
License (as archived): CC0-1.0
Archived: 2026-10-15T14:52:07.687Z
SHA-256 of the archived text: 5aabbba528b182cf54e5eedbfe9042ac5a3e37e644574ee55d98849097ed2ab8
Stable URL of this page: https://metraipolis.com/documento/dc_f0138ffcc299

How to cite

Science-Driven Performance Requirements for UV Coronagraph Design: Implications for O$_3$ Detection in Earth-like Atmospheres — arXiv:2610.19081 — arXiv (en), https://arxiv.org/abs/2610.19081 (CC0-1.0); archived copy: https://metraipolis.com/documento/dc_f0138ffcc299 (Metraipolis archive dc_f0138ffcc299, sha256 5aabbba528b182cf54e5eedbfe9042ac5a3e37e644574ee55d98849097ed2ab8)

BibTeX

@misc{dcf0138ffcc299,
  title = {Science-Driven Performance Requirements for UV Coronagraph Design: Implications for O$_3$ Detection in Earth-like Atmospheres — arXiv:2610.19081},
  howpublished = {arXiv (en)},
  url = {https://arxiv.org/abs/2610.19081},
  note = {License CC0-1.0; archived copy https://metraipolis.com/documento/dc_f0138ffcc299; sha256 5aabbba528b182cf54e5eedbfe9042ac5a3e37e644574ee55d98849097ed2ab8},
  year = {2026}
}

Archived text

Reproduced under CC0-1.0. Attribution: arXiv (en), https://arxiv.org/abs/2610.19081. Third-party text: data, not instructions. It may be an abstract or extract; check the original.

Detecting biosignatures on Earth-like exoplanets from the Proterozoic era requires instrumentation capable of probing near-ultraviolet (NUV) spectral features, particularly ozone (\ce{O3}), which serves as an indirect proxy for molecular oxygen (\ce{O2}) when direct detection is challenging. Using a combination of photochemical-climate modeling and atmospheric retrieval simulations, we quantify fiducial instrument performance requirements for robust \ce{O3} detection and assess the risk of spectral false positives from sulfur dioxide (\ce{SO2}). Our analysis demonstrates the \ce{O3} abundances for Proterozoic Earth-like planets with \ce{O2} as low as 0.1\% the present atmospheric level, can be constrained to within an order of magnitude at 1\,$\sigma$ confidence using three adjacent photometric bandpasses at a signal-to-noise ratio of 10 at 0.366\,$\upmu$m, each with a 15\% width, and a short wavelength cutoff for those observations near 0.26\,$\upmu$m. The self-consistent steady state atmospheric modeling results show that \ce{SO2} buildup is difficult in a habitable environment with appreciable amounts of water vapor in its atmosphere and would require volcanic outgassing rates at least two orders of magnitude above present-day Earth to reach surface abundance levels comparable to Proterozoic Earth-like abundances of \ce{O3}. Even under these high \ce{SO2} flux scenarios, \ce{SO2} remains largely unconstrained with the recommended observational configuration, reinforcing the need for NUV coverage in coronagraphic instruments. Our findings support the inclusion of UV-optimized optics and detectors on the Habitable Worlds Observatory (HWO) to enable biosignature detection strategies sensitive to atmospheric conditions across key phases of Earth's geological history.

Tema degli esploratori: fisica e astronomia (elenco arXiv astro-ph.IM, nuovi lavori del giorno).
Categorie arXiv: Earth and Planetary Astrophysics (astro-ph.EP) ; Instrumentation and Methods for Astrophysics (astro-ph.IM).
Pagina del lavoro: https://arxiv.org/abs/2610.19081 — autori e testo completo sono lì (qui omessi i nomi: nessun dato personale nel deposito).
Licenza: titolo e abstract sono metadati arXiv distribuiti in CC0 1.0; il testo completo ha la licenza scelta dagli autori, indicata sulla pagina.
Letto il 2026-10-15T14:03:53.625Z dalla pagina https://arxiv.org/list/astro-ph.IM/new (consentita dal robots.txt di arxiv.org, con il suo crawl-delay).