{
  "abstract": "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\\,$σ$ 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.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": "2610.19081",
  "author_total": 9,
  "authors": [
    {
      "name": "Amber V. Young"
    },
    {
      "name": "Giada Arney"
    },
    {
      "name": "Shawn Domagal-Goldman"
    },
    {
      "name": "Tyler D. Robinson"
    },
    {
      "name": "Roser Juanola-Parramon"
    },
    {
      "name": "Christopher Stark"
    },
    {
      "name": "Renyu Hu"
    },
    {
      "name": "Armen Tokadjian"
    },
    {
      "name": "Mario Damiano"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/f3ycpbn0ambx6.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2610.19081",
  "fulltext_url": null,
  "id": "f3ycpbn0ambx6",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2610.19081",
  "language": null,
  "licence": "LicenseRef-arXiv-nonexclusive-1.0",
  "licence_label": "arXiv licence",
  "licence_source": "article",
  "licence_url": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
  "metadata_licence": "CC0-1.0",
  "native_subjects": [
    [
      "arxiv",
      "astro-ph.EP"
    ],
    [
      "arxiv",
      "astro-ph.IM"
    ],
    [
      "openalex",
      "3103|Stellar, planetary, and galactic studies"
    ]
  ],
  "openalex": "W7222121656",
  "pdf_url": "https://arxiv.org/pdf/2610.19081",
  "pmcid": null,
  "pmid": null,
  "published": "2026-10-13",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/f3ycpbn0ambx6.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:29:31Z",
      "native_id": "2610.19081",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2610.19081"
    }
  ],
  "subjects": [
    {
      "field": "astronomy",
      "origin": "arxiv:astro-ph.IM",
      "subfield": "instrumentation-methods"
    },
    {
      "field": "astronomy",
      "origin": "arxiv:astro-ph.EP",
      "subfield": "planetary"
    }
  ],
  "title": "Science-Driven Performance Requirements for UV Coronagraph Design: Implications for O$_3$ Detection in Earth-like Atmospheres",
  "title_text": "Science-Driven Performance Requirements for UV Coronagraph Design: Implications for O_3 Detection in Earth-like Atmospheres",
  "type": "preprint",
  "updated_at": "2026-10-30T12:29:31Z",
  "url": "https://research.draconitic.com/paper/f3ycpbn0ambx6",
  "venue": "arXiv",
  "versions": []
}